Geochemical Journal最新文献_第3页

Geochemistry and petrogenesis of Proterozoic granitoids from Central Indian Tectonic Zone (CITZ): elemental and isotopic constraints 中印度构造带元古代花岗岩类的地球化学和岩石成因:元素和同位素约束

IF 0.8 4区地球科学

Geochemical Journal Pub Date : 2022-01-01 DOI: 10.2343/geochemj.gj22016

Meraj Alam, M. Mishra, T. Kaulina, T. Ahmad, A. Choudhary

引用次数: 1

Modification for the matrix effect in SIMS-derived water contents of silicate glasses 硅酸盐玻璃中sims衍生水含量基质效应的修正

IF 0.8 4区地球科学

Geochemical Journal Pub Date : 2022-01-01 DOI: 10.2343/geochemj.gj22019

Kenji Shimizu, T. Ushikubo, T. Kuritani, N. Hirano, Shigeru Yamashita

引用次数: 0

Ryugu particles found outside the Hayabusa2 sample container 隼鸟2号样本容器外发现的龙宫颗粒

IF 0.8 4区地球科学

Geochemical Journal Pub Date : 2022-01-01 DOI: 10.2343/geochemj.gj22017

A. Nakato, Shiori Inada, S. Furuya, M. Nishimura, T. Yada, M. Abe, T. Usui, Hideto Yoshida, T. Mikouchi, K. Sakamoto, H. Yano, Yayoi N. Miura, Y. Takano, S. Yamanouchi, R. Okazaki, H. Sawada, S. Tachibana

{"title":"Ryugu particles found outside the Hayabusa2 sample container","authors":"A. Nakato, Shiori Inada, S. Furuya, M. Nishimura, T. Yada, M. Abe, T. Usui, Hideto Yoshida, T. Mikouchi, K. Sakamoto, H. Yano, Yayoi N. Miura, Y. Takano, S. Yamanouchi, R. Okazaki, H. Sawada, S. Tachibana","doi":"10.2343/geochemj.gj22017","DOIUrl":"https://doi.org/10.2343/geochemj.gj22017","url":null,"abstract":"Introduction: Samples returned from C-type near-Earth asteroid (162173) Ryugu by the Hayabusa2 spacecraft are reported to be in close relation to CI chondrites [1-6]. They were collected at two different touchdown sites and separately stored in the sample catcher, which was transported into the sample container inside the reentry capsule to seal with a metal-to-metal sealing system [7-9]. The reentry capsule was transported from the capsule landing site (the Woomera Prohibited Area in South Australia) to the curation facility in JAXA, where the sample container was opened by the container opening devise. During this operation before installation of the sample container into the clean chamber [11], the sample container was cleaned to remove any particles present outside of the metal-to-metal sealing. In the cleaning operation, two millimeter-sized black particles (hereafter Q001 and Q002) were removed from the gap between the inner lid and the sample container (outside of the container sealing). In this study, we investigated mineralogical, petrographical, and chemical characteristics of Q001 and Q002 to relate them to Ryugu grains and/or potential contaminants [12].","PeriodicalId":12682,"journal":{"name":"Geochemical Journal","volume":"77 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90974848","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Errata: Watershed analysis for geochemical mapping in Japan based on a hydrologic model: The concentrations of 53 elements and the dominant lithology in a drainage basin [GEOCHEMICAL JOURNAL Vol. 55 (2021) No. 2 p. 59-88] 勘误:基于水文模型的日本地球化学制图流域分析:流域流域53种元素的浓度和主要岩性[地球化学杂志Vol. 55 (2021) No. 2 p. 59-88]

IF 0.8 4区地球科学

Geochemical Journal Pub Date : 2022-01-01 DOI: 10.2343/geochemj.2.0618_errata

Atsuyuki Ohta, N. Imai, Takashi Okai, M. Manaka, Ran Kubota, A. Nakamura, Yoshiko Tachibana

引用次数: 0

Mineralogy and geochemistry of pitchblende in the Changjiang U ore field, Guangdong Province, South China: Implications for its mineralization 广东长江U矿田沥青铀矿的矿物学地球化学特征及其成矿意义

IF 0.8 4区地球科学

Geochemical Journal Pub Date : 2022-01-01 DOI: 10.2343/geochemj.gj22006

Fujun Zhong, Jie Yan, Kai‐Xing Wang, Jiayong Pan, F. Xia, Guoqi Liu, Wenquan Liu

引用次数: 2

Petrographic characteristics in the pumice clast deposited along the Gulf of Thailand, drifted from Fukutoku-Oka-no-Ba 从福德冈野坝漂流而来的泰国湾浮石碎屑的岩石学特征

IF 0.8 4区地球科学

Geochemical Journal Pub Date : 2022-01-01 DOI: 10.2343/geochemj.gj22011

Kenta Yoshida, Y. Tamura, Tomoki Sato, C. Sangmanee, R. Puttapreecha, S. Ono

引用次数: 5

Isoprene production in the water column and sediment in Funka Bay, Hokkaido, Japan 日本北海道丰卡湾水柱和沉积物中异戊二烯的生成

IF 0.8 4区地球科学

Geochemical Journal Pub Date : 2022-01-01 DOI: 10.2343/geochemj.gj22013

A. Ooki, Naoya Miyashita, S. Umezawa, Manami Tozawa, Yuichi Nosaka, Daiki Nomura, H. Onishi, H. Abe, T. Takatsu

{"title":"Isoprene production in the water column and sediment in Funka Bay, Hokkaido, Japan","authors":"A. Ooki, Naoya Miyashita, S. Umezawa, Manami Tozawa, Yuichi Nosaka, Daiki Nomura, H. Onishi, H. Abe, T. Takatsu","doi":"10.2343/geochemj.gj22013","DOIUrl":"https://doi.org/10.2343/geochemj.gj22013","url":null,"abstract":"We conducted shipboard observations in Funka Bay, Hokkaido, Japan, in 2015, 2016 and 2019 to observe temporal variations of isoprene (C 5 H 8 ) concentration in water and sediment. We found increases in C 5 H 8 concentrations below and within the euphotic zone, which were associated with chl-a peaks and changes in nutrient and dissolved oxygen (DO). We found a C 5 H 8 peak in the subsurface layer within the euphotic zone at 20–30 m depth in May–June 2019 that coincided with a decrease in DO, suggesting that there was net oxygen consumption. We hypothesize that the rapid cycle of regenerated production in the subsurface layer in early summer resulted in C 5 H 8 production (1.00–1.75 pmol (μg chl-a) d –1 at 30 m), decreased DO, relatively high chl-a levels, and nutrient depletion. We propose that C 5 H 8 can be used as a new chemical parameter reflecting primary production, in addition to the common parameters of chlorophyll-a, nutrients, and oxygen. We attributed a C 5 H 8 peak at the surface in May–June 2019 to photosynthetic production of C 5 H 8 associated with new production, likely stimulated by the sporadic input of nutrients to the sea surface. In addition, this is the first study to report the presence of C 5 H 8 in seafloor sediments. We found very high C 5 H 8 concentrations in the sediment from the surface to 5 cm depth. We propose that C 5 H 8 production and degradation by the bacterial community in coastal marine sediments are approximately in balance.","PeriodicalId":12682,"journal":{"name":"Geochemical Journal","volume":"63 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85005729","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

EDITORIAL ACKNOWLEDGMENTS, REVIEWERS 编辑致谢，审稿人

IF 0.8 4区地球科学

Geochemical Journal Pub Date : 2022-01-01 DOI: 10.2343/geochemj.gj22_acknowledgments

引用次数: 0

Unique behavior of marine conditions in the Java Sea reconstructed from a 70 yr coral δ18O and Sr/Ca record from the Seribu Islands, Indonesia 根据印度尼西亚塞里布群岛70年珊瑚δ18O和Sr/Ca记录重建爪哇海海洋条件的独特行为

IF 0.8 4区地球科学

Geochemical Journal Pub Date : 2022-01-01 DOI: 10.2343/geochemj.gj22007

A. Genda, M. Ikehara, A. Suzuki, W. Hantoro, M. Inoue

引用次数: 1

Salinity, oxygen isotope, hydrogen isotope, and radiocarbon of coastal seawater of North Japan 日本北部沿海海水的盐度、氧同位素、氢同位素和放射性碳

IF 0.8 4区地球科学