Hiroyuki Matsuzaki
Biographic Data
| ID | 141268 |
|---|---|
| NAME | Hiroyuki Matsuzaki |
| GIVEN NAMES | Hiroyuki |
| FAMILY NAME | Matsuzaki |
| SIGNATURE | MATSUZAKI H |
| AFFILIATIONS | The University of Tokyo |
| ORCID | 0000-0001-8521-3029 |
| VERIFIED | Yes |
| TOTAL WORKS | 31 |
| TOTAL CITATIONS | 129 |
| AUTHOR COUNT | 31 |
| EDITOR COUNT | 0 |
| FIRST PUBLICATION YEAR | 2004 |
| LATEST PUBLICATION YEAR | 2025 |
| H-INDEX | 7 |
Massive Rock Avalanche Deposits at the Glaciated Tanbosawa Basin, East Face of Mount Tateyama (Oyama), Northern Japanese Alps, Central Japan
A thick mass of and unsorted debris is located in a valley-head cirque in the Tateyama area of the Northern Japanese Alps. The debris shows a characteristic deformation structure with jigsaw cracks, dike-like injections of fines, and shearing. Therefore it is judged to be composed of massive rock avalanche materials that are not of glacial or fluvial origin. Based on the cosmogenic nuclide exposure ages of granitic boulders, the debris is covered…
Blockslopes Caused by Large to Meso-scale Rock Slope Failures in the Upper Okumatajirodani Valley on the Eastern Side of Mount Maehotaka-dake North Ridge, Northern Japanese Alps
The geomorphological and geological characteristics, distributions, and ages of block slopes that developed at two alluvial cones (Bentenzawa valley and Okumatazirodani valley) along the Azusa River in the Kamikochi area, northern Japanese Alps, are clarified. These block slopes were believed to be of Pleistocene glacial origin in previous studies. A field survey was conducted, applying microtremor array observations to estimate subsurface geolog…
New Radiocarbon Evidence for Human Occupation in Central Argentina During the Middle and Late Holocene
The Ongamira Valley (Córdoba, Argentina) shows a persistent occupational history of its territory. Even one of the first Argentinian radiocarbon ( 14 C) dates was calculated in this valley; for 70 years, the chronology was based on relative dates (stratigraphy and its cultural content). For this reason, since 2010 a 14 C dating program has been developed focusing on the chronology of eight of the 60 sites identified so far for the valley. This wo…
Anthropogenic 129I in the South China Sea and coastal waters around Taiwan
In this article, we present a study of seawater 129I/127I time-series data from several coastal sites in Taiwan, including Yehliu Geopark (north–northeast coast), Kaohsiung (southwest coast), and Zhuwei Fishing Village (northwest coast). The objective of this study was to document how 129I/127I responds to known seasonal variations in the surface ocean currents that carry 129I to each of these sites. The responses were shown to be quite distinct.…
First results on diet and mobility of the agropastoral societies of western Catamarca, Argentina
Novopetrovka III—an Early Neolithic Site in the Western Amur Basin and Its Chronology
This article discusses the chronology of Novopetrovka III—a Neolithic settlement in the Western Amur basin, evaluated by the radiocarbon analysis of charred remains on pottery. The Novopetrovka culture as a whole, represented by Novopetrovka I-III and Konstantinovka sites, which had been excavated in the early 1960s, was dated to the 5th (possibly 6th) to early 4th millennia BC on the basis of the typology of the blade industry. The overview of d…
Pre- and Post-Accident 14 C Activities in tree rings near the Fukushima Dai-Ichi Nuclear Power Plant
Areas affected by routine radiocarbon ( 14 C) discharges from the Fukushima Dai-ichi Nuclear Power Plant (FDNPP) and accidental releases in March 2011 were investigated by analysis of cores from Japanese cypress and cedar trees growing at sites 9 and 24 km northwest of the plant. 14 C concentrations in tree rings from 2008–2014 (before and after the accident) were determined by accelerator mass spectrometry, with 14 C activities in the range 231–…
Radiocarbon dating and dietary reconstruction of the Early Neolithic Houtaomuga and Shuangta sites in the Song-Nen Plain, Northeast China
Climatic change and its influence on human society in western Japan during the Holocene
Dating and Stable Isotope Analysis of Charred Residues from Neolithic Sites in the Primorye, Russian Far East
This study attempts to reconstruct food habits through carbon (C) and nitrogen (N) isotope analysis and C/N analysis of charred residues inside pottery from the Primorye in the Russian Far East (Luzanova Sopka 2, Sergeyevka 1, Boisman 2, and Vetka 2 sites). Dates were obtained that were from the later stages of the Rudnaya culture (6980–6485 BP, 7800–7400 cal BP), proto-Boisman type (6760–6330 BP, 7600–7300 cal BP), Boisman culture (6155–4720 BP,…
New Data on the Chronology of the Initial Neolithic Gromatukha Culture, Western Amur Region
Since its discovery in the early 1960s, the chronology of the Neolithic Gromatukha culture in the Western Amur Region has undergone radical changes. After the appearance of a series of carbon dates based on charcoal and organic remains in clay texture, its initial attribution to the Early and Middle Neolithic (second half of the 5th to 4th millennia BC) was replaced by a much earlier estimate (from 15–16 to 8 cal ka BP). As a result, Gromatukha b…
Reappraisal of sea-level lowstand during the Last Glacial Maximum observed in the Bonaparte Gulf sediments, northwestern Australia
Weak monsoon event at 4.2 ka recorded in sediment from Lake Rara, Himalayas
Radiocarbon dating of one human and two dog burials from the Kamikuroiwa rock shelter site, Ehime Prefecture
Two complete dog skeletons were recovered during archeological excavations from 1961 to 1970 at the Kamikuroiwa rock shelter, a site that yielded a series of cultural entities from the Late Pleistocene, Incipient Jomon, and Early Jomon periods. Since two dogs were buried close to human skeletons, it was thought that these dogs had been buried by Jomon people, and hence provided the oldest direct evidence of Canis domestication in Japan. However, …
Compound-Specific 14 C Dating of Iodp Expedition 318 Core U1357A Obtained Off the Wilkes Land Coast, Antarctica
This study applied compound-specific radiocarbon analysis (CSRA) to a 186-m-long sediment core (U1357A) taken from Adélie Basin located on the continental shelf off Wilkes Land, East Antarctica. The CSRA targeted C 16 fatty acid as well as C 16 ., fatty acid and cyclopheophorbide- a -enol isolated from the sediment. Due to their high degradation rate, these compounds are expected to occur in low abundances in relict organic matter deposited at th…
Assessing the Chronology and Rewrapping of Funerary Bundles at the Prehispanic Religious Center of Pachacamac, Peru
Over 30 funerary bundles were excavated in 2005 from a large chamber tomb at the prehispanic religious center of Pachacamac on the central coast of Peru. The largest and most elaborate bundle was found in the innermost part of the tomb, tightly surrounded by other bundles. We hypothesized that this bundle contained the deceased leader of a social group whose members collectively cared for their ancestor's bundle (for example, by rewrapping it) an…
Dating and Stable Isotope Analysis of Charred Residues on the Incipient Jomon Pottery (Japan)
This study reports radiocarbon dates of more than 30 samples of charred residues on pottery sherds of the Incipient Jomon period. The ages of Linear-relief (Ryukisenmon) pottery were 15,300–13,700 cal BP, with great differences among the samples. The pitted decoration (Enkomon), Nail-impressed (Tsumegatamon), and pressing and dragging (Oshibikimon) types date to 13,800–12,400 cal BP. For pottery of the same type, differences among sites were larg…
Comparison of 14 C and U-Th Ages in Corals from Iodp #310 Cores Offshore Tahiti
Shallow-water tropical corals can be used to calibrate the radiocarbon timescale. In this paper, we present a new data set based on the comparison between 14 C ages and U-Th ages measured in fossil corals collected offshore the island of Tahiti during the Integrated Oceanic Drilling Program (IODP) Expedition 310. After applying strict mineralogical and geochemical screening criteria, the Tahiti record provides new data for 2 distinct time windows…
Dating Charred Remains on Pottery and Analyzing Food Habits in the Early Neolithic Period in Northeast Asia
This study reconstructs food habits through carbon and nitrogen isotope analysis, and C/N analysis of charred residues inside pottery from Amur River sites in Russia (Goncharka 1 site, Novotroitskoe 10 site, Kondon 1 site) and in Hokkaido, Japan (Taisho 3 site, Yachiyo A site). We obtained dates from 12,330 to 7920 BP for these sites. There are major differences in the carbon and nitrogen isotope ratios between the Taisho 3 site (δ 13 C: -21.7 to…
Water Column Profiles of Dissolved Inorganic Radiocarbon for the Kuroshio Region, Offshore of the Southern Japanese Coast
We present the water column profiles (surface to 2000 m depth) for dissolved inorganic radiocarbon ( 14 C DIC ) from 2 stations in the Kuroshio region including the Kuroshio large meander (LM) of 2004–2005. Surprisingly, the Δ 14 C DIC value varied up to 125‰ in the intermediate layer, especially near 600 m depth. In addition, the Δ 14 C DIC value was approximately − 150‰ at 200 m depth at the northern station of Kuroshio in August 2005. This val…
Precise Comparison of 14 C Ages from Choukai Jindai Cedar with IntCal04 Raw Data
We measured the radiocarbon ages of 165 single-year tree rings from a Japanese Choukai Jindai cedar using accelerator mass spectrometry (AMS). By wiggle-matching the Choukai_AMS data set to the IntCal04 calibration data using OxCal v 3.10 and using the variation of the correlation coefficients between the Choukai_AMS and IntCal04 data sets, we precisely re-estimated that the 321 Choukai Jindai cedar tree rings range from 780 to 460 cal BC with an…
Developing Ultra Small-Scale Radiocarbon Sample Measurement at the University of Tokyo
We have developed accelerator mass spectrometry (AMS) measurement techniques for ultra small-size samples ranging from 0.01 to 0.10 mg C with a new type of MC-SNICS ion source system. We can generate 4 times higher ion beam current intensity for ultra-small samples by optimization of graphite position in the target holder with the new ionizer geometry. CO 2 gas graphitized in the newly developed vacuum line is pressed to a depth of 1.5 mm from th…
Comparison of Depth Profiles of 129 I and 14 C Concentration in the Surface Layer of Soils Collected from Northeastern Japan
129 I/ 127 I and 14 C/ 12 C depth profiles were compared for the surface 30-cm layer of soil samples (Andisols) collected from Shimokita Peninsula, northeastern Japan, in November 2005. The 129 I/ 127 I and 14 C/ 12 C profiles have a clear correlation, even taking into account that the data include samples collected from different sites with different surface histories. These results, and considering that 14 C/ 12 C can be regarded as a proxy of …
Pre-Bomb Marine Reservoir Ages in the Western Pacific
In this study, molluscan shells housed at the University Museum, the University of Tokyo, provided a new set of region-specific correction values (ΔR) for the western Pacific, in particular for the central part of the main islands in the Japanese Archipelago and the southwest islands of Japan. The values of 40 total samples were calculated from 11 regions. North of the main islands and in the Ryukyu Islands, the mean ΔR values showed comparativel…
Excavations at Daram and Tevsh sites
Preface[Kazuo MIYAMOTO] / Chapter 1. Excavations at Daram Site[Kazuo MIYAMOTO, Hiroki OBATA, Tsend AMGALANTUGS, Nasan-Ochir ERDENE-OCHIR] / Chapter 2. Excavations at Tevsh Site[Kazuo MIYAMOTO, Tsend AMGALANTUGS] / Chapter 3. The analysis on the human skeletal remains of the Bronze Age unearthed from the both sites of Daram in the Khentii province and Tevsh in the southern Khangai, Mongol[Kenji OKAZAKI, Shiori YONEMOTO, and Takahiro NAKAHASHI] / C…
Pleistocene human remains from Shiraho-Saonetabaru Cave on Ishigaki Island, Okinawa, Japan, and their radiocarbon dating
Nine human remains were recovered from Shiraho-Saonetabaru Cave on Ishigaki Island, Okinawa Prefecture, Japan, between 2007 and 2009. Six of the nine samples produced well-preserved biogenic collagen, which was submitted to radiocarbon dating by accelerator mass spectrometry. Three human samples (Nos. 2, 4, and 8) from the fossil chamber were dated to between 16 and 20 ka BP, and can clearly be assigned to the Late Pleistocene. One animal bone fr…
Developing Ultra Small-Scale Radiocarbon Sample Measurement at the University of Tokyo
We have developed accelerator mass spectrometry (AMS) measurement techniques for ultra small-size samples ranging from 0.01 to 0.10 mg C with a new type of MC-SNICS ion source system. We can generate 4 times higher ion beam current intensity for ultra-small samples by optimization of graphite position in the target holder with the new ionizer geometry. CO 2 gas graphitized in the newly developed vacuum line is pressed to a depth of 1.5 mm from th…
Dating and Stable Isotope Analysis of Charred Residues on the Incipient Jomon Pottery (Japan)
This study reports radiocarbon dates of more than 30 samples of charred residues on pottery sherds of the Incipient Jomon period. The ages of Linear-relief (Ryukisenmon) pottery were 15,300–13,700 cal BP, with great differences among the samples. The pitted decoration (Enkomon), Nail-impressed (Tsumegatamon), and pressing and dragging (Oshibikimon) types date to 13,800–12,400 cal BP. For pottery of the same type, differences among sites were larg…
Comparison of 14 C and U-Th Ages in Corals from Iodp #310 Cores Offshore Tahiti
Shallow-water tropical corals can be used to calibrate the radiocarbon timescale. In this paper, we present a new data set based on the comparison between 14 C ages and U-Th ages measured in fossil corals collected offshore the island of Tahiti during the Integrated Oceanic Drilling Program (IODP) Expedition 310. After applying strict mineralogical and geochemical screening criteria, the Tahiti record provides new data for 2 distinct time windows…
Radiocarbon in 9th to 5th Century BC Tree-Ring Samples from the Ouban 1 Archaeological Site, Hiroshima, Japan
In order to investigate the regional atmospheric radiocarbon offset, accelerator mass spectrometry (AMS) 14 C measurements were made on 5-yr increments of a Japanese wood sample dendrochronologically dated to 820–436 BC. The 14 C data from the Japanese tree-ring samples were compared with the IntCal04 calibration curve (Reimer et al. 2004). In most parts, the differences between IntCal04 and 14 C dates in the Japanese tree-ring samples were withi…
Radiocarbon dating of one human and two dog burials from the Kamikuroiwa rock shelter site, Ehime Prefecture
Two complete dog skeletons were recovered during archeological excavations from 1961 to 1970 at the Kamikuroiwa rock shelter, a site that yielded a series of cultural entities from the Late Pleistocene, Incipient Jomon, and Early Jomon periods. Since two dogs were buried close to human skeletons, it was thought that these dogs had been buried by Jomon people, and hence provided the oldest direct evidence of Canis domestication in Japan. However, …
Dating Charred Remains on Pottery and Analyzing Food Habits in the Early Neolithic Period in Northeast Asia
This study reconstructs food habits through carbon and nitrogen isotope analysis, and C/N analysis of charred residues inside pottery from Amur River sites in Russia (Goncharka 1 site, Novotroitskoe 10 site, Kondon 1 site) and in Hokkaido, Japan (Taisho 3 site, Yachiyo A site). We obtained dates from 12,330 to 7920 BP for these sites. There are major differences in the carbon and nitrogen isotope ratios between the Taisho 3 site (δ 13 C: -21.7 to…
Assessing the Chronology and Rewrapping of Funerary Bundles at the Prehispanic Religious Center of Pachacamac, Peru
Over 30 funerary bundles were excavated in 2005 from a large chamber tomb at the prehispanic religious center of Pachacamac on the central coast of Peru. The largest and most elaborate bundle was found in the innermost part of the tomb, tightly surrounded by other bundles. We hypothesized that this bundle contained the deceased leader of a social group whose members collectively cared for their ancestor's bundle (for example, by rewrapping it) an…
Precise Comparison of 14 C Ages from Choukai Jindai Cedar with IntCal04 Raw Data
We measured the radiocarbon ages of 165 single-year tree rings from a Japanese Choukai Jindai cedar using accelerator mass spectrometry (AMS). By wiggle-matching the Choukai_AMS data set to the IntCal04 calibration data using OxCal v 3.10 and using the variation of the correlation coefficients between the Choukai_AMS and IntCal04 data sets, we precisely re-estimated that the 321 Choukai Jindai cedar tree rings range from 780 to 460 cal BC with an…
Radiocarbon Analysis of Tree Rings from a 15.5-Cal kyr BP Pyroclastically Buried Forest
We have determined the radiocarbon ages for 40-yr-interval tree rings in 2 fossil trees of the Towada Hachinohe buried forest, northeastern Honshu Island, Japan. The 14 C ages range from 13.0 to 13.3 kyr BP (about 15.5 cal kyr BP). The weighted average of the 14 C age of the outermost 5 rings is 13,133 ± 33 BP, which can be calibrated to 15,363–15,679 cal BP by using the IntCal04 standard curve (Reimer et al. 2004). The estimated δ 14 C values ra…
C Concentrations of Single-Year Tree Rings from About 22,000 Years Ago Obtained Using A Highly Accurate Measuring Method
We have measured the radiocarbon concentrations in single-yr tree rings of old wood by accelerated mass spectrometry (AMS) using a multicathode. The 14 C concentrations of 10 single-yr tree rings were measured in 100 tree rings at intervals of 10. For each single-yr tree-ring sample, typically 80 measurements of the 14 C concentrations were carried out using multicathodes. The sample standard deviations indicated that there are other fluctuations…
New Data on the Chronology of the Initial Neolithic Gromatukha Culture, Western Amur Region
Since its discovery in the early 1960s, the chronology of the Neolithic Gromatukha culture in the Western Amur Region has undergone radical changes. After the appearance of a series of carbon dates based on charcoal and organic remains in clay texture, its initial attribution to the Early and Middle Neolithic (second half of the 5th to 4th millennia BC) was replaced by a much earlier estimate (from 15–16 to 8 cal ka BP). As a result, Gromatukha b…
Compound-Specific 14 C Dating of Iodp Expedition 318 Core U1357A Obtained Off the Wilkes Land Coast, Antarctica
This study applied compound-specific radiocarbon analysis (CSRA) to a 186-m-long sediment core (U1357A) taken from Adélie Basin located on the continental shelf off Wilkes Land, East Antarctica. The CSRA targeted C 16 fatty acid as well as C 16 ., fatty acid and cyclopheophorbide- a -enol isolated from the sediment. Due to their high degradation rate, these compounds are expected to occur in low abundances in relict organic matter deposited at th…
New Radiocarbon Evidence for Human Occupation in Central Argentina During the Middle and Late Holocene
The Ongamira Valley (Córdoba, Argentina) shows a persistent occupational history of its territory. Even one of the first Argentinian radiocarbon ( 14 C) dates was calculated in this valley; for 70 years, the chronology was based on relative dates (stratigraphy and its cultural content). For this reason, since 2010 a 14 C dating program has been developed focusing on the chronology of eight of the 60 sites identified so far for the valley. This wo…
Dating and Stable Isotope Analysis of Charred Residues from Neolithic Sites in the Primorye, Russian Far East
This study attempts to reconstruct food habits through carbon (C) and nitrogen (N) isotope analysis and C/N analysis of charred residues inside pottery from the Primorye in the Russian Far East (Luzanova Sopka 2, Sergeyevka 1, Boisman 2, and Vetka 2 sites). Dates were obtained that were from the later stages of the Rudnaya culture (6980–6485 BP, 7800–7400 cal BP), proto-Boisman type (6760–6330 BP, 7600–7300 cal BP), Boisman culture (6155–4720 BP,…
Excavations at Daram and Tevsh sites
Preface[Kazuo MIYAMOTO] / Chapter 1. Excavations at Daram Site[Kazuo MIYAMOTO, Hiroki OBATA, Tsend AMGALANTUGS, Nasan-Ochir ERDENE-OCHIR] / Chapter 2. Excavations at Tevsh Site[Kazuo MIYAMOTO, Tsend AMGALANTUGS] / Chapter 3. The analysis on the human skeletal remains of the Bronze Age unearthed from the both sites of Daram in the Khentii province and Tevsh in the southern Khangai, Mongol[Kenji OKAZAKI, Shiori YONEMOTO, and Takahiro NAKAHASHI] / C…
Novopetrovka III—an Early Neolithic Site in the Western Amur Basin and Its Chronology
This article discusses the chronology of Novopetrovka III—a Neolithic settlement in the Western Amur basin, evaluated by the radiocarbon analysis of charred remains on pottery. The Novopetrovka culture as a whole, represented by Novopetrovka I-III and Konstantinovka sites, which had been excavated in the early 1960s, was dated to the 5th (possibly 6th) to early 4th millennia BC on the basis of the typology of the blade industry. The overview of d…
Pre-Bomb Marine Reservoir Ages in the Western Pacific
In this study, molluscan shells housed at the University Museum, the University of Tokyo, provided a new set of region-specific correction values (ΔR) for the western Pacific, in particular for the central part of the main islands in the Japanese Archipelago and the southwest islands of Japan. The values of 40 total samples were calculated from 11 regions. North of the main islands and in the Ryukyu Islands, the mean ΔR values showed comparativel…
Comparison of 14 C Ages Between LSC and AMS Measurements of Choukai Jindai Cedar Tree Rings at 2600 cal BP
Radiocarbon ages of Choukai Jindai cedar tree rings growing in the excess era of 14 C concentrations during 2757–2437 cal BP were measured using 2 types of 14 C measurement methods, i.e. liquid scintillation counting (LSC) and accelerator mass spectrometry (AMS). The difference between the 2 methods is 3.7 ± 5.2 14 C yr on average for 61 single-year tree rings, indicating good agreement between the methods. The Choukai data sets show a small shar…
C Ages of 43 Consecutive Single-Year Tree Rings Between 2710 and 2655 cal BP Using Accelerator Mass Spectrometry
We have measured the radiocarbon ages of 43 consecutive single-year tree rings using accelerator mass spectrometry (AMS) with a statistical accuracy of ∼2.3%. AMS 14 C ages of the 36 viable samples are between 2708 and 2666 cal BP, a period in which the Δ 14 C of the IntCal04 curve (Reimer et al. 2004) shows an enhancement. The 14 C ages of the samples are scattered with a Gaussian distribution around the interpolated IntCal04 calibration curve. …
C Concentrations of Single-Year Tree Rings from About 22,000 Years Ago Obtained Using A Highly Accurate Measuring Method
We have measured the radiocarbon concentrations in single-yr tree rings of old wood by accelerated mass spectrometry (AMS) using a multicathode. The 14 C concentrations of 10 single-yr tree rings were measured in 100 tree rings at intervals of 10. For each single-yr tree-ring sample, typically 80 measurements of the 14 C concentrations were carried out using multicathodes. The sample standard deviations indicated that there are other fluctuations…
C Ages of 43 Consecutive Single-Year Tree Rings Between 2710 and 2655 cal BP Using Accelerator Mass Spectrometry
We have measured the radiocarbon ages of 43 consecutive single-year tree rings using accelerator mass spectrometry (AMS) with a statistical accuracy of ∼2.3%. AMS 14 C ages of the 36 viable samples are between 2708 and 2666 cal BP, a period in which the Δ 14 C of the IntCal04 curve (Reimer et al. 2004) shows an enhancement. The 14 C ages of the samples are scattered with a Gaussian distribution around the interpolated IntCal04 calibration curve. …
Radiocarbon in 9th to 5th Century BC Tree-Ring Samples from the Ouban 1 Archaeological Site, Hiroshima, Japan
In order to investigate the regional atmospheric radiocarbon offset, accelerator mass spectrometry (AMS) 14 C measurements were made on 5-yr increments of a Japanese wood sample dendrochronologically dated to 820–436 BC. The 14 C data from the Japanese tree-ring samples were compared with the IntCal04 calibration curve (Reimer et al. 2004). In most parts, the differences between IntCal04 and 14 C dates in the Japanese tree-ring samples were withi…
Radiocarbon Analysis of Tree Rings from a 15.5-Cal kyr BP Pyroclastically Buried Forest
We have determined the radiocarbon ages for 40-yr-interval tree rings in 2 fossil trees of the Towada Hachinohe buried forest, northeastern Honshu Island, Japan. The 14 C ages range from 13.0 to 13.3 kyr BP (about 15.5 cal kyr BP). The weighted average of the 14 C age of the outermost 5 rings is 13,133 ± 33 BP, which can be calibrated to 15,363–15,679 cal BP by using the IntCal04 standard curve (Reimer et al. 2004). The estimated δ 14 C values ra…
Precise Comparison of 14 C Ages from Choukai Jindai Cedar with IntCal04 Raw Data
We measured the radiocarbon ages of 165 single-year tree rings from a Japanese Choukai Jindai cedar using accelerator mass spectrometry (AMS). By wiggle-matching the Choukai_AMS data set to the IntCal04 calibration data using OxCal v 3.10 and using the variation of the correlation coefficients between the Choukai_AMS and IntCal04 data sets, we precisely re-estimated that the 321 Choukai Jindai cedar tree rings range from 780 to 460 cal BC with an…
Developing Ultra Small-Scale Radiocarbon Sample Measurement at the University of Tokyo
We have developed accelerator mass spectrometry (AMS) measurement techniques for ultra small-size samples ranging from 0.01 to 0.10 mg C with a new type of MC-SNICS ion source system. We can generate 4 times higher ion beam current intensity for ultra-small samples by optimization of graphite position in the target holder with the new ionizer geometry. CO 2 gas graphitized in the newly developed vacuum line is pressed to a depth of 1.5 mm from th…
Comparison of Depth Profiles of 129 I and 14 C Concentration in the Surface Layer of Soils Collected from Northeastern Japan
129 I/ 127 I and 14 C/ 12 C depth profiles were compared for the surface 30-cm layer of soil samples (Andisols) collected from Shimokita Peninsula, northeastern Japan, in November 2005. The 129 I/ 127 I and 14 C/ 12 C profiles have a clear correlation, even taking into account that the data include samples collected from different sites with different surface histories. These results, and considering that 14 C/ 12 C can be regarded as a proxy of …
Pre-Bomb Marine Reservoir Ages in the Western Pacific
In this study, molluscan shells housed at the University Museum, the University of Tokyo, provided a new set of region-specific correction values (ΔR) for the western Pacific, in particular for the central part of the main islands in the Japanese Archipelago and the southwest islands of Japan. The values of 40 total samples were calculated from 11 regions. North of the main islands and in the Ryukyu Islands, the mean ΔR values showed comparativel…
Comparison of 14 C Ages Between LSC and AMS Measurements of Choukai Jindai Cedar Tree Rings at 2600 cal BP
Radiocarbon ages of Choukai Jindai cedar tree rings growing in the excess era of 14 C concentrations during 2757–2437 cal BP were measured using 2 types of 14 C measurement methods, i.e. liquid scintillation counting (LSC) and accelerator mass spectrometry (AMS). The difference between the 2 methods is 3.7 ± 5.2 14 C yr on average for 61 single-year tree rings, indicating good agreement between the methods. The Choukai data sets show a small shar…
Pleistocene human remains from Shiraho-Saonetabaru Cave on Ishigaki Island, Okinawa, Japan, and their radiocarbon dating
Nine human remains were recovered from Shiraho-Saonetabaru Cave on Ishigaki Island, Okinawa Prefecture, Japan, between 2007 and 2009. Six of the nine samples produced well-preserved biogenic collagen, which was submitted to radiocarbon dating by accelerator mass spectrometry. Three human samples (Nos. 2, 4, and 8) from the fossil chamber were dated to between 16 and 20 ka BP, and can clearly be assigned to the Late Pleistocene. One animal bone fr…
Water Column Profiles of Dissolved Inorganic Radiocarbon for the Kuroshio Region, Offshore of the Southern Japanese Coast
We present the water column profiles (surface to 2000 m depth) for dissolved inorganic radiocarbon ( 14 C DIC ) from 2 stations in the Kuroshio region including the Kuroshio large meander (LM) of 2004–2005. Surprisingly, the Δ 14 C DIC value varied up to 125‰ in the intermediate layer, especially near 600 m depth. In addition, the Δ 14 C DIC value was approximately − 150‰ at 200 m depth at the northern station of Kuroshio in August 2005. This val…
Dating and Stable Isotope Analysis of Charred Residues on the Incipient Jomon Pottery (Japan)
This study reports radiocarbon dates of more than 30 samples of charred residues on pottery sherds of the Incipient Jomon period. The ages of Linear-relief (Ryukisenmon) pottery were 15,300–13,700 cal BP, with great differences among the samples. The pitted decoration (Enkomon), Nail-impressed (Tsumegatamon), and pressing and dragging (Oshibikimon) types date to 13,800–12,400 cal BP. For pottery of the same type, differences among sites were larg…
Comparison of 14 C and U-Th Ages in Corals from Iodp #310 Cores Offshore Tahiti
Shallow-water tropical corals can be used to calibrate the radiocarbon timescale. In this paper, we present a new data set based on the comparison between 14 C ages and U-Th ages measured in fossil corals collected offshore the island of Tahiti during the Integrated Oceanic Drilling Program (IODP) Expedition 310. After applying strict mineralogical and geochemical screening criteria, the Tahiti record provides new data for 2 distinct time windows…
Dating Charred Remains on Pottery and Analyzing Food Habits in the Early Neolithic Period in Northeast Asia
This study reconstructs food habits through carbon and nitrogen isotope analysis, and C/N analysis of charred residues inside pottery from Amur River sites in Russia (Goncharka 1 site, Novotroitskoe 10 site, Kondon 1 site) and in Hokkaido, Japan (Taisho 3 site, Yachiyo A site). We obtained dates from 12,330 to 7920 BP for these sites. There are major differences in the carbon and nitrogen isotope ratios between the Taisho 3 site (δ 13 C: -21.7 to…
Compound-Specific 14 C Dating of Iodp Expedition 318 Core U1357A Obtained Off the Wilkes Land Coast, Antarctica
This study applied compound-specific radiocarbon analysis (CSRA) to a 186-m-long sediment core (U1357A) taken from Adélie Basin located on the continental shelf off Wilkes Land, East Antarctica. The CSRA targeted C 16 fatty acid as well as C 16 ., fatty acid and cyclopheophorbide- a -enol isolated from the sediment. Due to their high degradation rate, these compounds are expected to occur in low abundances in relict organic matter deposited at th…
Assessing the Chronology and Rewrapping of Funerary Bundles at the Prehispanic Religious Center of Pachacamac, Peru
Over 30 funerary bundles were excavated in 2005 from a large chamber tomb at the prehispanic religious center of Pachacamac on the central coast of Peru. The largest and most elaborate bundle was found in the innermost part of the tomb, tightly surrounded by other bundles. We hypothesized that this bundle contained the deceased leader of a social group whose members collectively cared for their ancestor's bundle (for example, by rewrapping it) an…
Radiocarbon dating of one human and two dog burials from the Kamikuroiwa rock shelter site, Ehime Prefecture
Two complete dog skeletons were recovered during archeological excavations from 1961 to 1970 at the Kamikuroiwa rock shelter, a site that yielded a series of cultural entities from the Late Pleistocene, Incipient Jomon, and Early Jomon periods. Since two dogs were buried close to human skeletons, it was thought that these dogs had been buried by Jomon people, and hence provided the oldest direct evidence of Canis domestication in Japan. However, …
Reappraisal of sea-level lowstand during the Last Glacial Maximum observed in the Bonaparte Gulf sediments, northwestern Australia
Weak monsoon event at 4.2 ka recorded in sediment from Lake Rara, Himalayas
Radiocarbon dating and dietary reconstruction of the Early Neolithic Houtaomuga and Shuangta sites in the Song-Nen Plain, Northeast China
Climatic change and its influence on human society in western Japan during the Holocene
Dating and Stable Isotope Analysis of Charred Residues from Neolithic Sites in the Primorye, Russian Far East
This study attempts to reconstruct food habits through carbon (C) and nitrogen (N) isotope analysis and C/N analysis of charred residues inside pottery from the Primorye in the Russian Far East (Luzanova Sopka 2, Sergeyevka 1, Boisman 2, and Vetka 2 sites). Dates were obtained that were from the later stages of the Rudnaya culture (6980–6485 BP, 7800–7400 cal BP), proto-Boisman type (6760–6330 BP, 7600–7300 cal BP), Boisman culture (6155–4720 BP,…
New Data on the Chronology of the Initial Neolithic Gromatukha Culture, Western Amur Region
Since its discovery in the early 1960s, the chronology of the Neolithic Gromatukha culture in the Western Amur Region has undergone radical changes. After the appearance of a series of carbon dates based on charcoal and organic remains in clay texture, its initial attribution to the Early and Middle Neolithic (second half of the 5th to 4th millennia BC) was replaced by a much earlier estimate (from 15–16 to 8 cal ka BP). As a result, Gromatukha b…
Pre- and Post-Accident 14 C Activities in tree rings near the Fukushima Dai-Ichi Nuclear Power Plant
Areas affected by routine radiocarbon ( 14 C) discharges from the Fukushima Dai-ichi Nuclear Power Plant (FDNPP) and accidental releases in March 2011 were investigated by analysis of cores from Japanese cypress and cedar trees growing at sites 9 and 24 km northwest of the plant. 14 C concentrations in tree rings from 2008–2014 (before and after the accident) were determined by accelerator mass spectrometry, with 14 C activities in the range 231–…
Anthropogenic 129I in the South China Sea and coastal waters around Taiwan
In this article, we present a study of seawater 129I/127I time-series data from several coastal sites in Taiwan, including Yehliu Geopark (north–northeast coast), Kaohsiung (southwest coast), and Zhuwei Fishing Village (northwest coast). The objective of this study was to document how 129I/127I responds to known seasonal variations in the surface ocean currents that carry 129I to each of these sites. The responses were shown to be quite distinct.…
Geology (28 works) · Geography (22 works) · Archaeology and ancient environmental studies (20 works) · Radiocarbon dating (19 works) · Geology and Paleoclimatology Research (17 works) · Archaeology (15 works) · Paleontology (14 works) · Isotope Analysis in Ecology (11 works) · Oceanography (10 works) · Pacific and Southeast Asian Studies (9 works)