Geochemical Journal最新文献_第5页

Application of B and Li isotope systematics for detecting chemical disturbance in groundwater associated with large shallow inland earthquakes in Kumamoto, Japan B、Li同位素系统在熊本内陆大浅层地震地下水化学扰动探测中的应用

IF 0.8 4区地球科学

Geochemical Journal Pub Date : 2021-01-01 DOI: 10.2343/geochemj.2.0633

M. Tanimizu, N. Sugimoto, T. Hosono, C. Kuribayashi, T. Morimoto, A. Ito, R. Umam, Y. Nishio, K. Nagaishi, T. Ishikawa

{"title":"Application of B and Li isotope systematics for detecting chemical disturbance in groundwater associated with large shallow inland earthquakes in Kumamoto, Japan","authors":"M. Tanimizu, N. Sugimoto, T. Hosono, C. Kuribayashi, T. Morimoto, A. Ito, R. Umam, Y. Nishio, K. Nagaishi, T. Ishikawa","doi":"10.2343/geochemj.2.0633","DOIUrl":"https://doi.org/10.2343/geochemj.2.0633","url":null,"abstract":"Copyright © 2021 by The Geochemical Society of Japan. caused by such contamination is sometimes enhanced by anthropogenic activities such as excessive pumping of groundwater (Smith et al., 2018; Jasechko et al., 2020). In addition, natural disasters such as large earthquakes can also trigger these problems. By analyzing the major ion concentrations, trace element concentrations, and stable isotope ratios of water molecules, several studies have described changes in the natural composition of groundwater in response to seismotectonic activities (Tsunogai and Wakita, 1995; Manga and Rowland, 2009; Barberio et al., 2017; Skelton et al., 2019). However, these changes have been rarely described using stable isotope ratios of dissolved trace elements (Poitrasson et al., 1999; Schuessler et al., 2016). The detailed mechanisms and processes of hydrochemical changes in the regional groundwater system of Kumamoto region of southern Japan in response to the Mw 7.0 Kumamoto crustal earthquake of 2016 were previously investigated using a high-resolution well monitoring network. The results suggested that a co-seismic groundwater drawdown surrounding the epicenter was Application of B and Li isotope systematics for detecting chemical disturbance in groundwater associated with large shallow inland earthquakes in Kumamoto, Japan","PeriodicalId":12682,"journal":{"name":"Geochemical Journal","volume":"60 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75541744","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

Spatio-temporal changes in the depositional environment of Miocene organic rich mudstones in the Akita Basin deduced from biomarker analysis 基于生物标志物分析的秋田盆地中新世富有机质泥岩沉积环境时空变化

IF 0.8 4区地球科学

Geochemical Journal Pub Date : 2021-01-01 DOI: 10.2343/geochemj.gj22001

Kenta Asahina, T. Nakajima, Koji U. Takahashi, Miyuki Kobayashi, Y. Hanamura

引用次数: 0

Constraints of the geochemical characteristics of apatite on uranium mineralization in a uraninite-rich quartz vein in the Haita area of the Kangdian region, China 康店地区海塔地区富铀矿石英脉磷灰石地球化学特征对铀矿化的制约

IF 0.8 4区地球科学

Geochemical Journal Pub Date : 2021-01-01 DOI: 10.2343/geochemj.2.0638

Minghui Yin, Zhengqi Xu, Hao Song, Chengjiang Zhang, Suheng Zhang, Jianmin Tian, Hu Guo

引用次数: 3

Gold-coated silver capsule for elemental analyzer-isotope ratio mass spectrometer: Robust against pretreatment of rock material for organic carbon and δ13C analyses 用于元素分析仪-同位素比质谱仪的金包银胶囊:对岩石材料预处理有机碳和δ13C分析具有强大的抗氧化能力

IF 0.8 4区地球科学

Geochemical Journal Pub Date : 2021-01-01 DOI: 10.2343/geochemj.2.0626

Y. Matsui, Wataru Fujisaki, J. Torimoto, Keiko Tanaka, M. Nishizawa, M. Yamamoto, S. Kawagucci, Y. Shimane, Mika Tei, K. Uematsu, Akihiro Tame, Y. Kawahito, T. Kameda

{"title":"Gold-coated silver capsule for elemental analyzer-isotope ratio mass spectrometer: Robust against pretreatment of rock material for organic carbon and δ13C analyses","authors":"Y. Matsui, Wataru Fujisaki, J. Torimoto, Keiko Tanaka, M. Nishizawa, M. Yamamoto, S. Kawagucci, Y. Shimane, Mika Tei, K. Uematsu, Akihiro Tame, Y. Kawahito, T. Kameda","doi":"10.2343/geochemj.2.0626","DOIUrl":"https://doi.org/10.2343/geochemj.2.0626","url":null,"abstract":"Fujisaki et al., 2016, 2018, 2019). To prepare the samples for OC analysis with EA-IRMS, coexisting carbonate minerals need to be removed to ensure accurate and precise quantification. For example, for a sediment sample that contains 1 wt% OC and 1 wt% carbonate derived C, the total C would be 2 wt% and the δCtotal C of the non-acidified (non-decalcified) sample would be about –11‰, since the δCorg of a typical pelagic sediment is about –22‰ while the δCcarbonate of benthic foraminifera is about 0‰. In this case, the δCtotal C value cannot be used as a proxy for the δCorg. Several approaches have been proposed for removing carbonate minerals, such as acid treatment using either hydrochloric, phosphoric, or sulfurous acid (Al-Aasm et al., 1990; Brodie et al., 2011) and the stepwise combustion method (Uchida et al., 2008). Acid treatment can be Gold-coated silver capsule for elemental analyzer-isotope ratio mass spectrometer: Robust against pretreatment of rock material for organic carbon and δ13C analyses","PeriodicalId":12682,"journal":{"name":"Geochemical Journal","volume":"1 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86478997","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: 1

Geochemical characteristics of paleotsunami deposits from the Shizuoka plain on the Pacific coast of middle Japan 日本中部太平洋沿岸静冈平原古海啸沉积地球化学特征

IF 0.8 4区地球科学

Geochemical Journal Pub Date : 2021-01-01 DOI: 10.2343/geochemj.2.0641

Takahiro Watanabe, N. Tsuchiya, A. Kitamura, S. Yamasaki, Fumiko Nara W.

{"title":"Geochemical characteristics of paleotsunami deposits from the Shizuoka plain on the Pacific coast of middle Japan","authors":"Takahiro Watanabe, N. Tsuchiya, A. Kitamura, S. Yamasaki, Fumiko Nara W.","doi":"10.2343/geochemj.2.0641","DOIUrl":"https://doi.org/10.2343/geochemj.2.0641","url":null,"abstract":"Copyright © 2021 by The Geochemical Society of Japan. (Mw) of past earthquakes have been previously estimated using geological records (Minoura et al., 1994; Nanayama et al., 2003; Goto et al., 2014; Chagué-Goff et al., 2015; Sawai et al., 2009, 2012, 2015). An event deposit is preliminarily found using grain size changes in a geologic stratum along with multiple other proxies for environmental changes (Watanabe et al., 2020). Additionally, geochemical analysis is widely used to estimate the source of the sediments (Minoura and Nakaya, 1991; Chagué-Goff et al., 2017). Following recent major subduction zone earthquakes, the analysis of tsunami deposits has been increasing to help clarify such geochemical features (Chagué-Goff et al., 2017; Watanabe et al., 2020). The geochemical signatures of tsunami deposits from the southwestern coasts of Spain, New Zealand, the Hawaiian Islands, Mexico and northeastern Japan have also been studied (Minoura et al., 1994; ChaguéGoff, 2010; Roy et al., 2012; Kuwatani et al., 2014; Yamasaki et al., 2015; Goff et al., 2020). Recently, geochemical characteristics of tsunami deposits have been well documented on the Pacific coast in the Tohoku Geochemical characteristics of paleotsunami deposits from the Shizuoka plain on the Pacific coast of middle Japan","PeriodicalId":12682,"journal":{"name":"Geochemical Journal","volume":"149 5 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91127077","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: 2

High-throughput isotope analysis of sub-nanogram sized lead using MC-ICP-MS with on-line thallium doping technique and desolvating nebulizer system 利用MC-ICP-MS在线铊掺杂技术和脱溶雾化系统对亚纳克级铅进行高通量同位素分析

IF 0.8 4区地球科学

Geochemical Journal Pub Date : 2021-01-01 DOI: 10.2343/geochemj.2.0612

K. Nagaishi, R. Nakada, T. Ishikawa

{"title":"High-throughput isotope analysis of sub-nanogram sized lead using MC-ICP-MS with on-line thallium doping technique and desolvating nebulizer system","authors":"K. Nagaishi, R. Nakada, T. Ishikawa","doi":"10.2343/geochemj.2.0612","DOIUrl":"https://doi.org/10.2343/geochemj.2.0612","url":null,"abstract":"Copyright © 2021 by The Geochemical Society of Japan. Hattori et al., 2017). However, both the ion detection yield and gain of the MIC detector can change through the long term continuous detection of analytes, and thus, careful monitoring and calibration of gain are necessary to achieve accurate analyses (Paul et al., 2005; Kent, 2008). The development of more convenient, precise isotope analysis of small-sized Pb samples still has great significance in terms of analyses of a large number of samples in geological, geochemical, and environmental studies. The MC-ICP-MS method with thallium (Tl) doping technique (e.g., Hirata, 1996; Collerson et al., 2002; Kamenov et al., 2004; Tanimizu and Ishikawa, 2006) has excellent potential to be used for this purpose. In this method, Pb sample solution doped with a standard Tl is used, and the measured 205Tl/203Tl ratios are utilized for the correction of mass discrimination effects for Pb isotopes during MC-ICP-MS analyses. Precise isotope analysis of sub-nanogram sized Pb sample is potentially achievable by the use of amplifiers with higher resistor and desolvating nebulizer system, which increases electrical signal/noise ratios and sample introduction efficiency, respectively. However, combined use of Tl doping technique and desolvating nebulizer system is not well established. This is because gradual oxidation of Tl+ to Tl3+ occurs under the presence of Pb2+, which causes a change of mass bias factor for Tl isotopes mainly due to preferential transmission of Tl isotopes through the desolvating process (Kamenov et al., 2004). To prevent this effect, Pb isotope measurement must be carried out within an hour after the Tl doping (Kamenov et al., 2004). OtherHigh-throughput isotope analysis of sub-nanogram sized lead using MC-ICP-MS with on-line thallium doping technique and desolvating nebulizer system","PeriodicalId":12682,"journal":{"name":"Geochemical Journal","volume":"4 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74812774","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

Role of viscous swirling in the formation of magnetite ocelli or fleck structure in the migmatites of Shillong Plateau Gneissic Complex, eastern India 黏性旋流在印度东部西隆高原片麻岩杂岩中磁铁矿ococelli或斑点结构形成中的作用

IF 0.8 4区地球科学

Geochemical Journal Pub Date : 2021-01-01 DOI: 10.2343/geochemj.2.0643

Bibhuti Gogoi, G. Hazarika, H. Chauhan, Sowrav Saikia

引用次数: 1

Application of handheld XRF on Ta-Nb-Sn-W ore: Factory calibration or user calibration? 手持式XRF在Ta-Nb-Sn-W矿石上的应用:工厂校准还是用户校准?

IF 0.8 4区地球科学

Geochemical Journal Pub Date : 2021-01-01 DOI: 10.2343/geochemj.2.0624

A. Somarin, Li Zhou, Ingo Steinhage

引用次数: 2

Characteristics in trace elements compositions of tephras (B-Tm and To-a) for identification tools 用于鉴定工具的麻黄微量元素组成特征(B-Tm和To-a)

IF 0.8 4区地球科学

Geochemical Journal Pub Date : 2021-01-01 DOI: 10.2343/geochemj.2.0619

Fumiko Watanabe Nara, T. Yokoyama, S. Yamasaki, M. Minami, Y. Asahara, Takahiro Watanabe, Kazuyoshi Yamada, N. Tsuchiya, Y. Yasuda

{"title":"Characteristics in trace elements compositions of tephras (B-Tm and To-a) for identification tools","authors":"Fumiko Watanabe Nara, T. Yokoyama, S. Yamasaki, M. Minami, Y. Asahara, Takahiro Watanabe, Kazuyoshi Yamada, N. Tsuchiya, Y. Yasuda","doi":"10.2343/geochemj.2.0619","DOIUrl":"https://doi.org/10.2343/geochemj.2.0619","url":null,"abstract":"Copyright © 2021 by The Geochemical Society of Japan. lacustrine and marine sediments can be preserved well when undisturbed by postdeposition erosion. Multiple dating studies using tephrochronology have been performed on lacustrine and marine sediments (Hopkins et al., 2015; Matsu’ura and Komatsubara, 2017; Sirocko et al., 2013). In order to establish the tephra layer as a robust chronological tool, it is essential to characterize each tephra using multiple approaches, such as morphology, mineralogy and geochemistry. The absolute date of the Millennium Eruption (ME) of Changbaishan Volcano (also referred to as Mt. Paektu, Baekdusan or Tianchi), located at the border between China and North Korea (Fig. 1a), has been defined as AD 946 analyzed by dendrochronological approaches (Hakozaki et al., 2018; Oppenheimer et al., 2017). This date is based on 14C contents in tree rings collected at the foot of Changbaishan Volcano by matching the observed 14C variations against the AD 774–775 14C spike (Miyake Characteristics in trace elements compositions of tephras (B-Tm and To-a) for identification tools","PeriodicalId":12682,"journal":{"name":"Geochemical Journal","volume":"19 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84588628","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: 6

Origin of porphyritic texture by magma mixing in the andesitic rocks of Ghansura Rhyolite Dome from the Bathani volcano-sedimentary sequence, Eastern India 印度东部巴塔尼火山-沉积层序中Ghansura流纹岩丘安山岩中岩浆混合形成的斑岩结构成因

IF 0.8 4区地球科学

Geochemical Journal Pub Date : 2021-01-01 DOI: 10.2343/geochemj.2.0613

Bibhuti Gogoi, G. Hazarika, H. Chauhan

引用次数: 2