Yao-Ping Wang, Tao Luo, Yuan Gao, Shuang Yu, Sibo Wang, Y. Zou
{"title":"Pearson correlation analysis of factors controlling the high abundance of rearranged hopanes in crude oils from the Southwest Depression of the Tarim Basin, China","authors":"Yao-Ping Wang, Tao Luo, Yuan Gao, Shuang Yu, Sibo Wang, Y. Zou","doi":"10.2343/geochemj.2.0592","DOIUrl":"https://doi.org/10.2343/geochemj.2.0592","url":null,"abstract":"","PeriodicalId":12682,"journal":{"name":"Geochemical Journal","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75870629","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}
H. Azizi, Ali Maghsoudloo, F. Nouri, Y. Asahara, Koshi Yamamoto, M. Minami, M. Tsuboi
{"title":"Investigation of rare earth elements (REEs) as exploration potential in Intrusive bodies in the northern Sanandaj-Sirjan zone (Kurdistan area), western Iran","authors":"H. Azizi, Ali Maghsoudloo, F. Nouri, Y. Asahara, Koshi Yamamoto, M. Minami, M. Tsuboi","doi":"10.2343/geochemj.2.0584","DOIUrl":"https://doi.org/10.2343/geochemj.2.0584","url":null,"abstract":"","PeriodicalId":12682,"journal":{"name":"Geochemical Journal","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72803314","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}
H. Iwamori, Hitomi Nakamura, Q. Chang, N. Morikawa, S. Haraguchi
1Earthquake Research Institute, The University of Tokyo, Japan 2Research Institute for Marine Geodynamics, Japan Agency for Marine-Earth Science and Technology (JAMSTEC), Japan 3Department of Earth and Planetary Sciences, Tokyo Institute of Technology, Japan 4Research Institute of Earthquake and Volcano Geology, Geological Survey of Japan, National Institute of Advanced Industrial Science and Technology (AIST), Japan 5Ocean Resources Research Center for Next Generation, Chiba Institute of Technology, Japan
{"title":"Multivariate statistical analyses of rare earth element compositions of spring waters from the Arima and Kii areas, Southwest Japan","authors":"H. Iwamori, Hitomi Nakamura, Q. Chang, N. Morikawa, S. Haraguchi","doi":"10.2343/geochemj.2.0583","DOIUrl":"https://doi.org/10.2343/geochemj.2.0583","url":null,"abstract":"1Earthquake Research Institute, The University of Tokyo, Japan 2Research Institute for Marine Geodynamics, Japan Agency for Marine-Earth Science and Technology (JAMSTEC), Japan 3Department of Earth and Planetary Sciences, Tokyo Institute of Technology, Japan 4Research Institute of Earthquake and Volcano Geology, Geological Survey of Japan, National Institute of Advanced Industrial Science and Technology (AIST), Japan 5Ocean Resources Research Center for Next Generation, Chiba Institute of Technology, Japan","PeriodicalId":12682,"journal":{"name":"Geochemical Journal","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78787894","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}
The late Triassic Baolun gold deposit hosted by Silurian phyllites is a large-scale gold deposit in Hainan Island, South China. In order to discuss the source of ore-forming material and deposit type, H-O isotope analyses of fluid inclusion, He-Ar isotopic and S isotopic studies of pyrite have been analyzed from auriferous quartz veins. The oxygen and hydrogen isotopic compositions ( d 18 O = 4.1–6.5‰, d D = –77.7 to –60.5‰) of ore-forming fluid, which are incompatible with metamorphic fluid, coincide with the characteristics of magmatic fluid. The He-Ar isotopic compositions from pyrite imply that the metallogenic material is derived from a crustal component and a mantle component. The d 34 S values of pyrite and pyrrhotite from mineralized quartz veins range from 2.3‰ to 6.3‰ and 1.5‰ to 7.1‰ respectively, which are lower than d 34 S values of pyrite from ore-hosting rocks and other gold deposits in Hainan Island. The values are higher than that derived from the mantle and are similar to magmatic rocks in nearby, which suggest that the sulfur is mainly derived from magmatic rocks of Hainan Island. Hence, the ore-forming fluid is primarily the product of magmatic differentiation, but the contribution of meteoric water could not be excluded. Based on the close spatial and temporal relationship with the Jianfnegling granite pluton ( ca . 240 Ma), which are alkali granites containing mantle components, the Baolun gold deposit is proposed to be an intrusion-related gold deposit instead of presupposed orogenic gold deposit. Based on structures, ore-hosting rocks, and isotope characteristics, the Baolun gold deposit was identified as a sediment-hosted intrusion-related gold deposit. Combined with contemporary Gezhen-type gold deposits ( ca . 228 Ma) that are a series of similar gold deposits hosted by the Baoban Group along the Gezhen ductile shear zone in Hainan Island, it is concluded that an identical gold metallogenic event occurred in Hainan Island during middle-late Triassic.
{"title":"H-O, S, He-Ar isotopes constrain on the genesis of the Baolun Gold Deposit in Hainan Island, South China","authors":"Liangliang Yu, L. Tian, Deru Xu, Q. Shan, M. Hou","doi":"10.2343/geochemj.2.0577","DOIUrl":"https://doi.org/10.2343/geochemj.2.0577","url":null,"abstract":"The late Triassic Baolun gold deposit hosted by Silurian phyllites is a large-scale gold deposit in Hainan Island, South China. In order to discuss the source of ore-forming material and deposit type, H-O isotope analyses of fluid inclusion, He-Ar isotopic and S isotopic studies of pyrite have been analyzed from auriferous quartz veins. The oxygen and hydrogen isotopic compositions ( d 18 O = 4.1–6.5‰, d D = –77.7 to –60.5‰) of ore-forming fluid, which are incompatible with metamorphic fluid, coincide with the characteristics of magmatic fluid. The He-Ar isotopic compositions from pyrite imply that the metallogenic material is derived from a crustal component and a mantle component. The d 34 S values of pyrite and pyrrhotite from mineralized quartz veins range from 2.3‰ to 6.3‰ and 1.5‰ to 7.1‰ respectively, which are lower than d 34 S values of pyrite from ore-hosting rocks and other gold deposits in Hainan Island. The values are higher than that derived from the mantle and are similar to magmatic rocks in nearby, which suggest that the sulfur is mainly derived from magmatic rocks of Hainan Island. Hence, the ore-forming fluid is primarily the product of magmatic differentiation, but the contribution of meteoric water could not be excluded. Based on the close spatial and temporal relationship with the Jianfnegling granite pluton ( ca . 240 Ma), which are alkali granites containing mantle components, the Baolun gold deposit is proposed to be an intrusion-related gold deposit instead of presupposed orogenic gold deposit. Based on structures, ore-hosting rocks, and isotope characteristics, the Baolun gold deposit was identified as a sediment-hosted intrusion-related gold deposit. Combined with contemporary Gezhen-type gold deposits ( ca . 228 Ma) that are a series of similar gold deposits hosted by the Baoban Group along the Gezhen ductile shear zone in Hainan Island, it is concluded that an identical gold metallogenic event occurred in Hainan Island during middle-late Triassic.","PeriodicalId":12682,"journal":{"name":"Geochemical Journal","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85115319","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}
Jie Li, Jingjing Fan, Shengjie Sun, Jing Zhang, Hong-Yan Li
{"title":"An investigation of Re and Os contamination by materials used in rock and mineral powdering","authors":"Jie Li, Jingjing Fan, Shengjie Sun, Jing Zhang, Hong-Yan Li","doi":"10.2343/geochemj.2.0608","DOIUrl":"https://doi.org/10.2343/geochemj.2.0608","url":null,"abstract":"","PeriodicalId":12682,"journal":{"name":"Geochemical Journal","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91115455","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}
H. Yoshioka, M. Takeuchi, S. Sakata, Hiroshi A Takahashi, Manabu Takahashi, S. Tanabe, Takeshi Hayashi, A. Inamura, M. Yasuhara
{"title":"Microbial methane production and oxidation in the Holocene mud beneath the Kanto Plain of central Japan","authors":"H. Yoshioka, M. Takeuchi, S. Sakata, Hiroshi A Takahashi, Manabu Takahashi, S. Tanabe, Takeshi Hayashi, A. Inamura, M. Yasuhara","doi":"10.2343/geochemj.2.0597","DOIUrl":"https://doi.org/10.2343/geochemj.2.0597","url":null,"abstract":"","PeriodicalId":12682,"journal":{"name":"Geochemical Journal","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87287641","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}
Yutao Sun, Xiaocheng Zhou, Jianguo Du, Zhengfu Guo
{"title":"CO diffusive emission in the co-seismic rupture zone of the Wenchuan MS 8.0 earthquake","authors":"Yutao Sun, Xiaocheng Zhou, Jianguo Du, Zhengfu Guo","doi":"10.2343/geochemj.2.0586","DOIUrl":"https://doi.org/10.2343/geochemj.2.0586","url":null,"abstract":"","PeriodicalId":12682,"journal":{"name":"Geochemical Journal","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84374092","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}
{"title":"Constraints on the thermal history of the Allende (CV3) meteorite by gradual and stepwise pyrolyses of insoluble organic matter","authors":"K. Mimura, Fumiaki Okumura, N. Harada","doi":"10.2343/geochemj.2.0589","DOIUrl":"https://doi.org/10.2343/geochemj.2.0589","url":null,"abstract":"","PeriodicalId":12682,"journal":{"name":"Geochemical Journal","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84252030","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}
Hiroshi A Takahashi, H. Handa, Ayumi Sugiyama, M. Matsushita, M. Kondo, Hiroyuki Kimura, M. Tsujimura
{"title":"Filtration and exposure to benzalkonium chloride or sodium chloride to preserve water samples for dissolved inorganic carbon analysis","authors":"Hiroshi A Takahashi, H. Handa, Ayumi Sugiyama, M. Matsushita, M. Kondo, Hiroyuki Kimura, M. Tsujimura","doi":"10.2343/geochemj.2.0570","DOIUrl":"https://doi.org/10.2343/geochemj.2.0570","url":null,"abstract":"","PeriodicalId":12682,"journal":{"name":"Geochemical Journal","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72734814","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}
{"title":"Petrogenesis and tectonic setting of the Wulong two-mica monzogranite on Liaodong Peninsula, NE China: Constraints from zircon U-Pb and Hf-O isotopic data","authors":"Yongbin Wang, Bing Yu, Qingdong Zeng, Weikang Guo, Jin-Hui Yang, Q. Meng","doi":"10.2343/GEOCHEMJ.2.0564","DOIUrl":"https://doi.org/10.2343/GEOCHEMJ.2.0564","url":null,"abstract":"","PeriodicalId":12682,"journal":{"name":"Geochemical Journal","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76874579","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}
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