S. Takano, Mao Tsuchiya, S. Imai, Yuhei Yamamoto, Y. Fukami, Katsuhiko Suzuki, Y. Sohrin
Nickel (Ni), copper (Cu), and zinc (Zn) are commonly used in human activities and pollute aquatic environments including rivers and oceans. Recently, Ni, Cu, and Zn isotope ratios have been measured to identify their sources and cycles in environments. We precisely determined the Ni, Cu, and Zn isotope ratios in rain, snow, and rime collected from Uji City and Mt. Kajigamori in Japan, and investigated the potential of isotopic ratios as tracers of anthropogenic materials. The isotope and elemental ratios suggested that road dust is the main source of Cu in most rain, snow, and rime samples and that some of the Cu may originate from fossil fuel combustion. Zinc in the rain, snow, and rime samples may be partially attributed to Zn in road dust. Zinc isotope ratios in the Uji rain samples are lower than those in the road dust, which would be emitted via high temperature processes. Nickel isotope ratios are correlated with V/Ni ratios in the rain, snow, and rime samples, suggesting that their main source is heavy oil combustion. Furthermore, we analyzed water samples from the Uji and Tawara Rivers and the Kakita River spring in Japan. Nickel and Cu isotope ratios in the river water samples were significantly heavier than those in rain, snow, and rime samples, while Zn isotope ratios were similar. This is attributed to isotopic fractionation of Cu and Ni between particulate-dissolved phases in river water or soil.
{"title":"Isotopic analysis of nickel, copper, and zinc in various freshwater samples for source identification","authors":"S. Takano, Mao Tsuchiya, S. Imai, Yuhei Yamamoto, Y. Fukami, Katsuhiko Suzuki, Y. Sohrin","doi":"10.2343/GEOCHEMJ.2.0627","DOIUrl":"https://doi.org/10.2343/GEOCHEMJ.2.0627","url":null,"abstract":"Nickel (Ni), copper (Cu), and zinc (Zn) are commonly used in human activities and pollute aquatic environments including rivers and oceans. Recently, Ni, Cu, and Zn isotope ratios have been measured to identify their sources and cycles in environments. We precisely determined the Ni, Cu, and Zn isotope ratios in rain, snow, and rime collected from Uji City and Mt. Kajigamori in Japan, and investigated the potential of isotopic ratios as tracers of anthropogenic materials. The isotope and elemental ratios suggested that road dust is the main source of Cu in most rain, snow, and rime samples and that some of the Cu may originate from fossil fuel combustion. Zinc in the rain, snow, and rime samples may be partially attributed to Zn in road dust. Zinc isotope ratios in the Uji rain samples are lower than those in the road dust, which would be emitted via high temperature processes. Nickel isotope ratios are correlated with V/Ni ratios in the rain, snow, and rime samples, suggesting that their main source is heavy oil combustion. Furthermore, we analyzed water samples from the Uji and Tawara Rivers and the Kakita River spring in Japan. Nickel and Cu isotope ratios in the river water samples were significantly heavier than those in rain, snow, and rime samples, while Zn isotope ratios were similar. This is attributed to isotopic fractionation of Cu and Ni between particulate-dissolved phases in river water or soil.","PeriodicalId":12682,"journal":{"name":"Geochemical Journal","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79581125","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}
highly fractionated granite is geologically related to postorogenic events and also to mineralization of rare-metals such as W, Sn, Sb, REEs etc. Another one of the geochemical characteristics of such highly fractionated granite is chondrite-normalized REE pattern with large Eu negative anomaly. In addition, the rhyolite is the most evolved volcanic rock. Since the chemical composition of major elements and chondrite-normalized REE patterns in rhyolite are similar to those of highly fractionated granites, rhyolite was considered highly fractionated igneous rock for comparison of Eu isotope ratio in highly fractionated granite. Eu is a very interesting element of REEs because it has two oxidation states (Eu2+ and Eu3+) whereas most of the rare earth elements exist as the trivalent state (3+) in the nature. The divalent oxidation state of Eu becomes a cause of elemental fractionation during magma evolution in the Earth and planetary system and can be used as an indicator of oxygen fugacity of magma system (Burnham et al., 2015). Eu has only two isotopes, 151Eu and 153Eu. Though Belli et al. (2007) reported that 151Eu decayed to 147Pm by α decay with the half-life T1/2 = 5 × 10 18 yr, apparently, 151Eu can be considered as a stable isotope in earth and solar system. In addition, Eu isotope ratio in geological rocks may vary due to redox condition in Earth system (Dauphas et al., 2014). Europium isotope fractionation in highly fractionated igneous rocks with large Eu negative anomaly
高分选花岗岩在地质上与造山事件有关，也与W、Sn、Sb、ree等稀有金属的成矿作用有关。高分异花岗岩的另一个地球化学特征是球粒陨石归一化稀土模式，具有较大的Eu负异常。流纹岩是演化最成熟的火山岩。由于流纹岩主要元素化学组成和球粒陨石归一化稀土模式与高分馏花岗岩相似，因此在比较高分馏花岗岩Eu同位素比值时，流纹岩被认为是高分馏火成岩。Eu是一种非常有趣的稀土元素，因为它有两个氧化态(Eu2+和Eu3+)，而大多数稀土元素在自然界中以三价态(3+)存在。Eu的二价氧化态成为地球和行星系统岩浆演化过程中元素分馏的原因，可以作为岩浆系统氧逸度的指标(Burnham et al.， 2015)。Eu只有两种同位素，151Eu和153Eu。虽然Belli et al.(2007)报道151Eu通过α衰变衰变为147Pm，半衰期T1/2 = 5 × 10 18 yr，但显然151Eu可以被认为是地球和太阳系中的稳定同位素。此外，地质岩石中的Eu同位素比值可能会因地球系统的氧化还原条件而变化(Dauphas et al.， 2014)。具有大Eu负异常的高分选火成岩中铕同位素分选
{"title":"Europium isotope fractionation in highly fractionated igneous rocks with large Eu negative anomaly","authors":"Seung-Gu Lee, Tsuyoshi Tanaka","doi":"10.2343/geochemj.2.0631","DOIUrl":"https://doi.org/10.2343/geochemj.2.0631","url":null,"abstract":"highly fractionated granite is geologically related to postorogenic events and also to mineralization of rare-metals such as W, Sn, Sb, REEs etc. Another one of the geochemical characteristics of such highly fractionated granite is chondrite-normalized REE pattern with large Eu negative anomaly. In addition, the rhyolite is the most evolved volcanic rock. Since the chemical composition of major elements and chondrite-normalized REE patterns in rhyolite are similar to those of highly fractionated granites, rhyolite was considered highly fractionated igneous rock for comparison of Eu isotope ratio in highly fractionated granite. Eu is a very interesting element of REEs because it has two oxidation states (Eu2+ and Eu3+) whereas most of the rare earth elements exist as the trivalent state (3+) in the nature. The divalent oxidation state of Eu becomes a cause of elemental fractionation during magma evolution in the Earth and planetary system and can be used as an indicator of oxygen fugacity of magma system (Burnham et al., 2015). Eu has only two isotopes, 151Eu and 153Eu. Though Belli et al. (2007) reported that 151Eu decayed to 147Pm by α decay with the half-life T1/2 = 5 × 10 18 yr, apparently, 151Eu can be considered as a stable isotope in earth and solar system. In addition, Eu isotope ratio in geological rocks may vary due to redox condition in Earth system (Dauphas et al., 2014). Europium isotope fractionation in highly fractionated igneous rocks with large Eu negative anomaly","PeriodicalId":12682,"journal":{"name":"Geochemical Journal","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86205278","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":"10Be/9Be ratios of phenakite and beryl measured via direct Cs sputtering: Implications for selecting suitable Be carrier minerals for the measurement of low-level 10Be","authors":"Atsunori Nakamura, Atsuyuki Ohta, Hiroyuki Matsuzaki, Takashi Okai","doi":"10.2343/geochemj.2.0630","DOIUrl":"https://doi.org/10.2343/geochemj.2.0630","url":null,"abstract":"","PeriodicalId":12682,"journal":{"name":"Geochemical Journal","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84197848","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}
Thomas Ferrini, Olivier Grandjouan, O. Pourret, R. Martinez
{"title":"Does carbon dioxide storage by cyanobacteria induce biomineralization in presence of basaltic glass?","authors":"Thomas Ferrini, Olivier Grandjouan, O. Pourret, R. Martinez","doi":"10.2343/GEOCHEMJ.2.0617","DOIUrl":"https://doi.org/10.2343/GEOCHEMJ.2.0617","url":null,"abstract":"","PeriodicalId":12682,"journal":{"name":"Geochemical Journal","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2020-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85299497","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}
M. Tsujisaka, Shinsuke Nishida, S. Takano, M. Murayama, Y. Sohrin
{"title":"Constraints on redox conditions in the Japan Sea in the last 47,000 years based on Mo and W as palaeoceanographic proxies","authors":"M. Tsujisaka, Shinsuke Nishida, S. Takano, M. Murayama, Y. Sohrin","doi":"10.2343/geochemj.2.0606","DOIUrl":"https://doi.org/10.2343/geochemj.2.0606","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":"73460038","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}
Miguel Ángel Martínez, E. Lorenzo, A. Morato, Adriana Gamboa
{"title":"Distribution and geochemical significance of biphenyls and related bicyclic aromatic structures in oils from Ancon oilfield (Tertiary Progreso Basin), Ecuador","authors":"Miguel Ángel Martínez, E. Lorenzo, A. Morato, Adriana Gamboa","doi":"10.2343/geochemj.2.0598","DOIUrl":"https://doi.org/10.2343/geochemj.2.0598","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":"82283459","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":"Comparison of S-type/I-type (Australia) and Ilmenite-series/Magnetite-series (Japan) in terms of gas features occluded in granitoids","authors":"Koichiro Nagamine, M. Araki","doi":"10.2343/geochemj.2.0591","DOIUrl":"https://doi.org/10.2343/geochemj.2.0591","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":"78457792","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}
Y. Orihashi, R. Anma, S. Machida, M. Sasaki, Kaishi Nakao, Y. Takaku, N. Abe
{"title":"U-Pb dating of granitic cobble (dropstone) recovered from inner slope of the Chile Trench (48°S): Constraint for its provenance","authors":"Y. Orihashi, R. Anma, S. Machida, M. Sasaki, Kaishi Nakao, Y. Takaku, N. Abe","doi":"10.2343/geochemj.2.0602","DOIUrl":"https://doi.org/10.2343/geochemj.2.0602","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":"89652293","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":"Influence of dual sulfate reduction pathways on pore-fluid chemistry and occurrences of methane hydrate in sediment cores (IODP-353) off Mahanadi basin, Bay of Bengal","authors":"A. Peketi, A. Mazumdar, S. Pillutla, D. J. Patil","doi":"10.2343/geochemj.2.0576","DOIUrl":"https://doi.org/10.2343/geochemj.2.0576","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":"80047080","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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