Faculty Profiles - MINAMI, Masayo

Papers - MINAMI, Masayo

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Marine reservoir effect deduced from C-14 dates on marine shells and terrestrial remains at archeological sites in Japan Reviewed

Toshio Nakamura, Iwao Nishida, Hideki Takada, Mitsuru Okuno, Masayo Minami, Hirotaka Oda

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS Vol. 259 ( 1 ) page： 453 - 459 2007.6

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：ELSEVIER SCIENCE BV

Paired marine and terrestrial samples were collected at archeological shell mounds in Kagoshima, Saga and Aichi prefectures and selected from sediment samples bored at the Mawaki archeological site in Ishikawa prefecture, to evaluate the local marine reservoir effect in Japan. The local reservoir corrections, Delta R, were evaluated to be 8 +/- 110 and - 178 +/- 113 C-14 years for Miyasaka shell mound, - 125 +/- 50 to -45 +/- 49 and -86 +/- 48 to -21 +/- 50 C-14 years for Higashimyo shell mound, -46 +/- 52, 40 +/- 44, -136 +/- 44 and 100 + 44 14C years for Yoshigo shell mound, -255 +/- 38 and - 146 +/- 46 C-14 years for Kuzubasama shell mound, -71 +/- 33, -30 +/- 85 and -78 +/- 74 C-14 years on average for C4, C5 and C6 cores, respectively, from the Mawaki site. The existing data along with the present results suggest that the Delta R values obtained for central to southern part of Japan are consistent with zero or a bit negative, but are different from the Delta R values of 200 to 500 C-14 years for the northern parts of the Japanese archipelago. (c) 2007 Elsevier B.V. All rights reserved.

DOI： 10.1016/j.nimb.2007.01.186

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Scopus

An improved extraction system to measure carbon-14 terrestrial ages of meteorites and pairing of the Antarctic Yamato-75097 group chondrites(Proceedings of the 19^<th> Symposium on Chronological Studies at the Nagoya University Center for Chronological Research in 2006,Part1)

Minami Masayo, Terui Atsushi, Takaoka Nobuo, Nakamura Toshio

名古屋大学加速器質量分析計業績報告書 ( 18 ) page： 55 - 55 2007.3

Publisher：名古屋大学年代測定資料研究センター

第19回名古屋大学年代測定総合研究センターシンポジウム平成18(2006)年度報告<第1部> Proceedings of the 19th symposiumon on Chronological Studies at the Nagoya University Center for Chronological Research\in 2006 日時:平成19 (2007)年1月15日(月)～17日(水) 会場:名古屋大学シンポジオン Date:January15th-17th, 2007 Venue:Nagoya Uhiversity Symposion Hall

DOI： 10.18999/sumrua.18.55

Present Status of AMS ^<14>C facility of Nagoya University and its applications to archeology and geology(Proceedings of the 19^<th> Symposium on Chronological Studies at the Nagoya University Center for Chronological Research in 2006,Part1)

NAKAMURA Toshio, MINAMI Masayo, ODA Hirotaka, IKEAD Akiko, WATANABE Takahiro, MIYAHARA Hiroko, OHTA Tomoko, YOSHIOKA Shigeo, NISHIDA Masami

名古屋大学加速器質量分析計業績報告書 ( 18 ) page： 31 - 32 2007.3

Publisher：名古屋大学年代測定資料研究センター

DOI： 10.18999/sumrua.18.31

Estimation of paleotemperature from racemization of aspartic acid in combination with radiocarbon age(Proceedings of the 19^<th> Symposium on Chronological Studies at the Nagoya University Center for Chronological Research in 2006,POSTER SESSION)

MINAMI Masayo, TAKEYAMA Masami, MURANAKA Yasushi, NAKAMURA Toshio

名古屋大学加速器質量分析計業績報告書 ( 18 ) page： 83 - 83 2007.3

Publisher：名古屋大学年代測定資料研究センター

第19回名古屋大学年代測定総合研究センターシンポジウム平成18(2006)年度報告<POSTER SESSION> Proceedings of the 19th symposiumon on Chronological Studies at the Nagoya University Center for Chronological Research\in 2006 日時:平成19 (2007)年1月15日(月)～17日(水) 会場:名古屋大学シンポジオン Date:January15th-17th, 2007 Venue:Nagoya Uhiversity Symposion Hall

DOI： 10.18999/sumrua.18.83

Diurnal variation of CO_2 concentration, Δ^<14>C and δ^<13>C in an urban forest : Estimate of the anthropogenic and biogenic CO_2 contributions(Proceedings of the 19^<th> Symposium on Chronological Studies at the Nagoya University Center for Chronological Research in 2006,Part1)

TAKAHASHI HIROSHI A., KONOHIRA EIICHI, HIYAMA TETSUYA, MINAMI MASAYO, NAKAMURA TOSHIO, YOSHIDA NAOHIRO

Summaries of Researches using AMS at Nagoya University Vol. 18 ( 18 ) page： 53 - 53 2007.3

Variations of C/N ratios, δ^<13>C and δ^<15>N values in human bone sections(Proceedings of the 19^<th> Symposium on Chronological Studies at the Nagoya University Center for Chronological Research in 2006,POSTER SESSION)

TAKIGAMI Mai, MINAMI Masayo, NAKAMURA Toshio

Summaries of Researches using AMS at Nagoya University Vol. 18 ( 18 ) page： 73 - 82 2007.3

Language：Japanese Publisher：Nagoya University

Prehistrical human bone is used for ^<14>C dating and isotope palaeodietary analysis. Fossil bone tends to be suffered from exogenous contaminants and diagenetic alteration during burial, especially in tropical and wet areas, and the state of bone collagen preservation differs with each bone sample. Since bone sections in an individual have different internal structures, such as density, thickness, amount of spongins and compact bone, different sections could have various levels of diagenesis. In this study, we investigated whether collagen extracted from different sections of an individual has variations of C/N ratios, δ^<13>C and δ^<15>N values for different sections of an individual, and whether we can estimate its palaeodietary by analyzing one bone section of a whole individual. The samples used are eleven bone sections (cranium, sphenoid, tooth, rib, humerus, radius or ulna, the lower femur, the central femur, tibia and two back-bones) in an individual, nine sections in another, and seven sections in the other, collected from the Yuigahama-minami archealogical site, Kamakura, Japan. The surface of fossil samples were shaved and ultrasonicated repeatedly in distilled water, followed by HCl and NaOH treatments; then samples were lyophilized and pulverized. The powdered bone sample was treated with 0.6M-HCl in a cellulose tube in a beaker over 20h at 4℃. The decalcified bone sample was treated by 0.6M-NaOH followed by 1.2M-HCl and 0.6M-HCl. Gelatin was extracted from acid/alkali-insoluble residue by heating in distilled water for 12h at 80-90℃. Combusted gelatin was refined into N_2 and CO_2. These gases were used for carbon and nitrogen isotopic measurement by using an isotope ratio mass spectrometer (Finnigan, MAT252). Gelatin was wrapped into a Sn cup and measured for C/N ratios by using an elemental analyzer (Euro Vector, Euro EA 3000). To estimate sample preparation-induced variation, seven gelatins were extracted from a bone section, and each measured for C/N ratios, δ^<13>C and δ^<15>N values. The deviations of δ^<13>C and δ^<15>N values for seven gelatins are ±0.1‰ and ±0.2‰, respectively. Most bone sections have gelatin yield of more than 0.7 wt%, and carbon yield of the combusted gelatin between 42 and 46 wt%. Bone with more than 0.7 wt% gelatin is generally well preserved, and collagens with around 40 wt% C are intact. The bone samples in this study, therefore, are well preserved and regarded as suitable for analysis. The C/N ratios of gelatins varied from 3.1 to 3.4 with different sections in an individual. The values show quality of the gelatin extractions because the good collagens have C/N ratios between 2.9 and 3.6. The δ^<13>C values of gelatins have variations of about 1‰, between -19.3 and -18.2‰, for different bone sections in an individual. The other two individuals have variations between -19.3 and -18.4‰, and -18.3 and -17.7‰. The δ^<15>N values have variations of about 1.5‰ (12.6〜14.0‰, 12.4〜13.1‰ and 12.6〜14.1‰, respectively) for different sections of each individual. There is a positive correlation betweenδ^<13>C andδ^<15>N values. The back-bones tend to have highest values, and the rib and tooth have a little higher values than the others.

DOI： 10.18999/sumrua.18.73

CiNii Books

Status and applications of Tandetron AMS system-II at Nagoya University in 2006(Proceedings of the 19^<th> Symposium on Chronological Studies at the Nagoya University Center for Chronological Research in 2006,Part 2)

NAKAMURA Toshio, MINAMI Masayo, ODA Hirotaka, IKEDA Akiko, WATANABE Takahiro, MIYAHARA Hiroko, OHTA Tomoko, YOSHIOKA Shigeo, NISHIDA Masami

Summaries of Researches using AMS at Nagoya University Vol. 18 ( 18 ) page： 91 - 97 2007.3

Language：Japanese Publisher：Nagoya University

A second ^<14>C-AMS system (Model 4130-AMS), built by High Voltage Engineering Europe (HVEE), B.V, The Netherlands, was delivered to Nagoya University in 1996/97. Acceptance tests were completed in January of 1999, and routine measurements began in mid-2000. Since completion of the acceptance tests in early 1999, we have encountered a lot of troubles with the machine, in particular in 2002 (see Fig.1). Since 2002, the machine has relatively worked well, expect for minor problems. However, it should be stressed that even a minor malfunction, ^<14>C measurements are not possible with the system. In fact, the AMS machine was in good condition in the early half of 2006. However, since June in 2006, we had a serious problem with the high voltage generation system. We opened the accelerator tank in October and replaced totally 154 diodes and 5 resistors for the high-voltage generator system used to rectify the AC power source and stabilize the DC current. Thus the number of targets measured was 1115 in 2006, which is almost the half of that in normal year. We also encountered a trouble with a cooling system of the power generator for the analyzing magnets both for high energy and low energy beams. The cooling-water flow for the power generator was disturbed by chemical deposits in the water tube, and was not enough to cool down the generator. Thermo-switch stopped the generator for safety and thus we could not operate the analyzing magnets. We replaced the damaged tubes to new ones. This trouble also limited the number of targets measured.

DOI： 10.18999/sumrua.18.91

CiNii Books

Geochemical study on human and animal bones excavated from the Yuigahama site, Kamakura, Japan(Proceedings of the 19^<th> Symposium on Chronological Studies at the Nagoya University Center for Chronological Research in 2006,Part 2)

Minami Masayo, Nakamura Toshio, Hirata Kazuaki, Nagaoka Tomohito, Hoshino Keigo

Summaries of Researches using AMS at Nagoya University ( 18 ) page： 134 - 143 2007.3

Publisher：Nagoya University

During the past several decades, many medieval skeletons were excavated from archaeological sites in the Yuigahama area, Kamakura, Japan. The excavations yielded more than 5,000 individuals in varying states of preservation from the Zaimokuza, Seiyokan, Yuigahama-minami and Chusei Shudan Bochi sites. Medieval Kamakura was an ancient capital of the Kamakura Shogunate, and a lot of people lived in Kamakura with high population density. The human skeletons excavated from the Zaimokuza site are reported to be humans dead by competition at the end of the Kamakura Shogunate, but a detailed study on dating of the human skeletons has not made yet. In this study, we measured ^<14>C ages, together with carbon and nitrogen isotope ratios, of human skeletal remains excavated from the Yuigahama-minami site and Chusei Shudan Bochi site. The δ^<13>C and δ^<15>N were not different between human skeletal samples of both sites, while the ^<14>C ages were different between them: The human bones of the Yuigahama-minami site are 100 year younger than those of the medieval collective-cemetery site. All of ages of human skeletons from both of the sites are older than the latest Kamakura period. The δ^<13>C and δ^<15>N values of the medieval Kamakura people are higher than those of terrestrial mammals, indicating that they exploited some amount of marine fish and/or mammals with higher δ^<13>C and δ^<15>N as protein sources. Therefore, the ^<14>C ages obtained for human skeletons could be order than the true ages. ^<87>Sr/^<86>Sr isotopic ratios of human skeletons of the Yuigahama-minami site tend to be higher than those of the Chusei Shudan Bochi site. Soils, plants and animals feeding on them in a given locality have ^<87>Sr/^<86>Sr values that generally mirror underlying bedrock composition, and thus ^<87>Sr/^<86>Sr ratios of human skeletons are useful tools for assessing migration in prehistory. The result obtained in this study suggests that Yuigahama-minami humans and Chusei Shudan Bochi humas lived in different areas. More skeleton samples should be analyzed for determining detailed ^<14>C ages of humans excavated from the Yuigahama sites, and for estimating migration of prehistory of the medieval Kamakura humans.

DOI： 10.18999/sumrua.18.134

鎌倉由比ヶ浜埋葬人骨および獣骨の地球化学的研究

南　雅代・中村俊夫・平田和明・長岡朋人・鵜澤和宏

名古屋大学加速器質量分析計業績報告書 Vol. XVIII page： 134-143 2007

Estimation of paleotemperature from racemization of aspartic acid in combination with radiocarbon age. Reviewed

Minami, M., Takeyama, M., Mimura, K. and Nakamura, T.

Nucl. Instr. and Meth. in Phys. Res. Vol. B259 page： 547-551 2007

Application of (14C) Wggle-matching to support dendrochronological analysis in Japan

Nakamura T., Okuno M., Kimura K., Mitsutani T., Moriwaki H., Ishizuka Y., Kim K. H., Jing B. L., Oda H., Minami M., Takada H.

TREE-RING RESEARCH Vol. 63 ( 1 ) page： 37 - 46 2007

Reconstruction of migration and mobility using strontium isotope analysis of archaeological human skeletons -Do 87Sr/86Sr ratios of animal bones reflect 87Sr/86Sr ratios of the birth- and growth-places?-

Minami Masayo, Suzuki Kazuhiro, Goto Akiko, Kato Takenori, Watanabe Ken-ichi, Hasegawa Takuya

Abstracts of Annual Meeting of the Geochemical Society of Japan Vol. 54 ( 0 ) page： 203 - 203 2007

Publisher：GEOCHEMICAL SOCIETY OF JAPAN

To evaluate whether 87Sr/86Sr ratio of a bone reflects 87Sr/86Sr ratio of the birth- and growth-places, two bone samples, together with the geological samples in their birth- and growth-places, were measured for 87Sr/86Sr ratios by TIMS. The samples used are a boar collected at Asuke, Toyota City, Aichi prefecture, and a black bass collected from Lake Biwa. The 87Sr/86Sr ratio of the boar bone was 0.71001±0.00002, while those of stream sediments in the Asuke area was around 0.710. The 87Sr/86Sr ratio of the black bass bone was 0.71215±0.00002, while those of surface water at the southern basin in Lake Biwa was 0.71233±0.00002. The similar 87Sr/86Sr ratios between bone and its provenance geology indicates that the 87Sr/86Sr ratio of bone reflects the isotopic ratios of the birth- and growth-places.

DOI： 10.14862/geochemproc.54.0.203.0

CiNii Research

Origin Determination of Fossil Bone using Resonance Ionization Mass Spectrometry

SASADA SEIJI, HIGUCHI YUKI, TOMITA HIDEKI, Watanabe Kenichi, Kawarabayasi Jyun, Iguchi Tetsuo, Minami Masayo, Suzuki Kazuhiro, Katou Takenori, Goto Syouko, Hasegawa Takuya

Proceedings of Annual / Fall Meetings of Atomic Energy Society of Japan Vol. 2007s ( 0 ) page： 66 - 66 2007

Application of (14C) Wggle-matching to support dendrochronological analysis in Japan

Nakamura T, Okuno M, Kimura K, Mitsutani T, Moriwaki H, Ishizuka Y, Kim K. H, Jing B. L, Oda H, Minami M, Takada H

TREE-RING RESEARCH Vol. 63 ( 1 ) page： 37 - 46 2007

Geochemistry of heavily altered Archean volcanic and volcaniclastic rocks of the Warrawoona Group, at Mt. Goldsworthy in the Pilbara Craton, Western Australia : Implications for alteration and origin

Sugitani Kenichiro, Yamashita Fumiaki, Nagaoka Tsutomu, MINAMI MASAYO, YAMAMOTO KOSHI

Geochemical journal : journal of the Geochemical Society of Japan Vol. 40 ( 5 ) page： 523 - 535 2006.10

Geochemistry and sedimentary petrology of Archean clastic sedimentary rocks at Mt. Goldsworthy, Pilbara Craton, Western Australia: Evidence for the early evolution of continental crust and hydrothermal alteration Reviewed

K Sugitani, F Yamashita, T Nagaoka, K Yamamoto, M Minami, K Mimura, K Suzuki

PRECAMBRIAN RESEARCH Vol. 147 ( 1-2 ) page： 124 - 147 2006.6

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：ELSEVIER SCIENCE BV

Geochemical and petrological analyses of Archean clastic metasedimentary rocks at Mt. Goldsworthy in the Pilbara Craton, Western Australia reveal the early evolution of continental crust and the Earth's surface environment. The succession correlative to the ca. 3.4 Ga Strelley Pool Chert is composed dominantly of silicified medium-grained to very coarse-grained sandstone, siltstone and shale, with minor chert and precipitative beds of nahcolite and barite. The sandstone is generally rich in detrital quartz, with the coarse-grained sandstone containing abundant, very well rounded mono-crystalline quartz that is assumed to be derived from older sedimentary rocks. The recycled detritus is mixed with first-cycle detrital material such as feldspar and barite that is sourced from reworked precipitative beds. The sandstone also contains zircon, Fe-Ti oxides, sulfides and lithic fragments of various origins including mafic-ultramafic volcanic rocks, sedimentary and possibly metamorphic rocks.
Al-Ti-Zr systematics indicates that the source area for the Mt. Goldsworthy clastic metasedimentary rocks was locally subjected to hydrothermal alteration. Reaction with the acid solution resulted in Al-dissolution and the formation of Zr- and Ti-enriched residual detrital material. The enrichment in heavy rare earth elements and low Al2O3/TiO2 values of Mt. Goldsworthy samples reflects the inflow of the residual zircon- and Ti-oxides-enriched detritus. Th/Sc, La/Sc and Eu/Eu-* ratios that are unaffected by contamination by the residual detritus indicate a mixed provenance with a significant contribution from granitoid rocks. The presence of detrital zircon older than 3.5 Ga was also demonstrated in this study. (c) 2006 Elsevier B.V. All rights reserved.

DOI： 10.1016/j.precamres.2006.02.006

Web of Science

Scopus

Geochemistry of heavily altered Archean volcanic and volcaniclastic rocks of the Warrawoona Group, at Mt. Goldworthy in the Pilbara Craton, Western Australia: Implications for alteration and origin. Reviewed

Sugitani, K., Yamashita, F., Nagaoka T., Minami, M. and Yamamoto, K.

Geochemical Journal Vol. 40 page： 523-535 2006

INAA trace element analysis of stream sediments collected from the northeastern areas of Aichi Prefecture, central Japan. Reviewed

Minami, M., Shibata, S. and Tanaka, T.

J. Earth Planet. Sci. Nagoya Univ. Vol. 53 page： 15-32 2006

INAA trace element analysis of stream sediments collected from the nortearstern areas of Aichi Prefecture, central Japan

MINAMI M., SHIBATA Shin-nosuke, TANAKA Tsuyoshi

The Journal of Earth and Planetary Sciences, Nagoya University ( 53 ) page： 15 - 32 2006

Publisher：名古屋大学

Geochemistry and Cosmochemistry Laboratory, Nagoya University, started a geochemical mapping project in 1994 to make environmental assessment of the Chubu area in Japan. During ten years from 1994 to 2004, stream sediment samples of 1,563 were collected in the northeastern parts of Aichi Prefecture. Major element data of these samples by X-ray fluorescence spectrometry (XRF) and the discussion on their regional spatial distributions have been published. Here we report 22 element analysis (Sc, Cr, Fe, Co, Zn, As, Rb, Sb, Cr, Ba, La, Ce, Sm, Eu, Tb, Yb, Lu, Hf, Ta, Au, Th and U) of the sediment samples by instrumental neutron activation analysis (INAA), together with discussion on the accuracy and precision of our analytical method by INAA. A new automated γ-ray counting and data processing system for INAA and postaldelivery system of irradiated samples from Japan Atomic Energy Research Institute were utilized. The INAA system enables us simple and rapid INAA analysis of a large number of samples. By using this system, nine GSJ rock reference samples (JB-1a, JB-2, JA-1, JG-1a, JG-2, JLk-1, JSd-1, JSd-2 and JSd-3) and one USGS rock standard G-2 were analyzed to examine accuracy and precision of analytical results. The results show good agreement with the reference values, indicating that our analytical system is effective for analysis of stream sediments with various bedrock geology. On the other hand, in order to evaluate accruracy of the values obtained by INAA, comparison of analytical results of stream sediments by INAA with the previously analyzed data by inductively coupled plasma atomic emission spectrometry (ICP-AES), atomic absorption spectrometry (AAS) and XRF was made. The result indicates that the data by the ICP-AES and AAS methods, which need HF digestion of samples, could be lower than the true values for some elements due to partly incomplete decomposition of samples. The INAA method, which needs no HF digestion, is suitable for accurate analysis for a large number of samples in the geochemical mapping project. We have collected stream sediments collected at the same site every year since 1994 to 2004. The samples were used to evaluate sample heterogeneity of the sediment collected at the same site. Most of trace elements, except for Cr, Zn, Hf and Au, of the samples show the concentrations with ±(30～50)% deviations, a little larger than the analytical errors. The Cr, Zn, Hf and Au concentrations have larger deviations, indicating the heterogeneous distribution of small accessory minerals at the sampling site and even in sample aliquots of 100 mg.国立情報学研究所で電子化したコンテンツを使用している。

DOI： 10.18999/joueps.53.15

Behavior of arsenic and gold in Mesozoic and Paleozoic areas, Inuyama-city,Aichi Prefecture;studies by geochemical mapping

Ito Tomoko, Tanaka Tsuyoshi, Minami Masayo

Abstracts of Annual Meeting of the Geochemical Society of Japan Vol. 53 ( 0 ) page： 136 - 136 2006

Publisher：GEOCHEMICAL SOCIETY OF JAPAN

Gold, arsenic and antimony appear together in hydrothermally altered area. However, Au exists very little in the eastern part of Inuyama-city, although high As concentrations are observed. There might be different mechanism of elemental concentration in As and Au from hydrothermally altered area. In this study, we collected 101 stream sediments in Inuyama-city, Aichi Prefecture, and determine major elements and trace elements that included As ,Sb and Au. We drew the geochemical map of these elements and discuss mobility of elements in Mesozoic and Paleozoic area.

DOI： 10.14862/geochemproc.53.0.136.0

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Papers - MINAMI, Masayo