{"title":"Characteristics of Bayern Fluid Inclusions","authors":"R. Ye, Y. Bai","doi":"10.46427/gold2020.3024","DOIUrl":"https://doi.org/10.46427/gold2020.3024","url":null,"abstract":"","PeriodicalId":12817,"journal":{"name":"Goldschmidt Abstracts","volume":"24 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74215408","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Keeping in view the toxicity of uranium and to reduce exposure to uranium and avoid high doses, it is essential to examine on routine bases the concentration of natural radionuclide uranium (U) in surface and groundwater resources [1]. Uranium contamination of groundwater is a rising issue in northern India [2]. In this approach, the concentrations of U (total U) were measure in subsurface alluvium soil and groundwater resources of Southwest Parts of Punjab State, Northern India. The objectives of this study were to (1) show the processes leading to uranium distribution in the subsurface sediment and groundwater to the relative influence of reduction and oxidation changes and role of agriculture on the dispersion of particulate Uranium, and (2) to identify primary/secondary U minerals and the associated alteration products. Analysis of hydrogeochemical and geochemical parameters revealed a strong correlation between U and bicarbonate and strontium in groundwater and moderately strong relation between U and Te, Au, Ni, Pb in subsurface sediment. Relatively higher concentrations of Au, V, Ni, V, Th and REE (Nd, Ce, Pr, Eu) have been associated with uraniferous mineral in shallow subsoil. The groundwater uranium content in the study area varied from 35 µg/L to 260 µg/L in different level of aquifers. Th/U ratio was calculated to know the sedimentary processes in the region and its reveal strong oxidizing environment in subsoil with Th/U ratio range from 3.84- 5.89. A rare secondary uranium mineral Cliffordite (very rare tellurium mineral) found with low concentration in the clay layer associated with lead, barite, quartz and limonite Uranium is solubilised from the sediment sample in both carbonate and bicarbonate leaching systems. Secondary uranium species are eventually adsorbs interstitial iron oxide forms as reducing conditions were re-established
{"title":"Distribution of Natural Uranium in Subsurface Sediment and Groundwater Resources in Southwest Parts of Punjab State, India","authors":"D. Das, R. Bala","doi":"10.46427/gold2020.523","DOIUrl":"https://doi.org/10.46427/gold2020.523","url":null,"abstract":"Keeping in view the toxicity of uranium and to reduce exposure to uranium and avoid high doses, it is essential to examine on routine bases the concentration of natural radionuclide uranium (U) in surface and groundwater resources [1]. Uranium contamination of groundwater is a rising issue in northern India [2]. In this approach, the concentrations of U (total U) were measure in subsurface alluvium soil and groundwater resources of Southwest Parts of Punjab State, Northern India. The objectives of this study were to (1) show the processes leading to uranium distribution in the subsurface sediment and groundwater to the relative influence of reduction and oxidation changes and role of agriculture on the dispersion of particulate Uranium, and (2) to identify primary/secondary U minerals and the associated alteration products. Analysis of hydrogeochemical and geochemical parameters revealed a strong correlation between U and bicarbonate and strontium in groundwater and moderately strong relation between U and Te, Au, Ni, Pb in subsurface sediment. Relatively higher concentrations of Au, V, Ni, V, Th and REE (Nd, Ce, Pr, Eu) have been associated with uraniferous mineral in shallow subsoil. The groundwater uranium content in the study area varied from 35 µg/L to 260 µg/L in different level of aquifers. Th/U ratio was calculated to know the sedimentary processes in the region and its reveal strong oxidizing environment in subsoil with Th/U ratio range from 3.84- 5.89. A rare secondary uranium mineral Cliffordite (very rare tellurium mineral) found with low concentration in the clay layer associated with lead, barite, quartz and limonite Uranium is solubilised from the sediment sample in both carbonate and bicarbonate leaching systems. Secondary uranium species are eventually adsorbs interstitial iron oxide forms as reducing conditions were re-established","PeriodicalId":12817,"journal":{"name":"Goldschmidt Abstracts","volume":"12 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74235225","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Source to Sink Dynamics in the Southern Neotethys: Exemplified by a Chemical Study of Triassic-Miocene Sandstones from Cyprus","authors":"Guohui Chen, A. Robertson","doi":"10.46427/gold2020.380","DOIUrl":"https://doi.org/10.46427/gold2020.380","url":null,"abstract":"","PeriodicalId":12817,"journal":{"name":"Goldschmidt Abstracts","volume":"25 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74364312","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"A Fluid-Rock Reaction Experiment in Semi-Open Flowing System at 500-300 ℃ and 50-20 Mpa: Implications for the Formation of Potassic Zone and Coexisting Mineralization in Porphyry Copper Deposits","authors":"Jianping Li, Huayong Chen, Long Su","doi":"10.46427/gold2020.1487","DOIUrl":"https://doi.org/10.46427/gold2020.1487","url":null,"abstract":"","PeriodicalId":12817,"journal":{"name":"Goldschmidt Abstracts","volume":"54 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72739730","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
D. Kemp, K. Izumi, Wenhan Chen, S. Jin, Wesley T. Fraser
{"title":"Climate Forcing on Millennial, Orbital and Million Year Scales: A Case Study from the Toarcian Oceanic Anoxic Event","authors":"D. Kemp, K. Izumi, Wenhan Chen, S. Jin, Wesley T. Fraser","doi":"10.46427/gold2020.1274","DOIUrl":"https://doi.org/10.46427/gold2020.1274","url":null,"abstract":"","PeriodicalId":12817,"journal":{"name":"Goldschmidt Abstracts","volume":"25 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74787878","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Cong Zhang, T. Bader, H. V. van Roermund, Jingsui Yang
Due to the high density at mantle depths, subducted oceanic crust rarely exhumes to the surface of Earth, making it hard to acknowledge the evolution and dynamic behavior of oceanic crust. The Sumdo eclogite-bearing metamorphic belt, lying between the north and south Lhasa terranes, is a natural laboratory to study the metamorphic evolution of oceanic eclogites. For the newly discovered Xilang eclogite in the Sumdo metamorphic belt, Tibet, we combined phase equilibrium modeling with detailed petrological investigations and obtained near-peak metamorphic conditions of 539 °C at 1.84 GPa and a fast exhumation P-T path with a steep slope, which is much lower than the eclogites in the other areas of the Sumdo metamorphic belt. Quartz inclusions sealed in garnet from high-pressure rocks are known to preserve residual pressures during fast exhumation, which can be used as an indicator of the peak metamorphic conditions of eclogites. Quartz from four different areas in the belt, including Xilang, Sumdo, Jilang, and Xindaduo, have been measured by laser Raman micro spectroscopy. Xilang eclogite preserved the highest residual pressure of 0.53 ± 0.07 GPa in the quartz stability field. A comparison of the residual pressures between eclogites from different areas reveals a positive relationship of the residual pressure and the peak metamorphic conditions for the areas with similar exhumation processes. The exhumation duration of the host rocks also controls the residual pressures, which confirmed the previous numerically modeling of the mechanical solutions of viscous relaxation in the host mineral. It indicates that the systematic investigation of residual pressures may be a new way to get geochronological information in addition to isotopic investigations.
{"title":"Metamorphic Evolution and Exhumation Processes of the Newly Discovered Xilang Eclogite in Tibet—constraints from Phase Equilibrium Modeling and Raman Microspectroscopy","authors":"Cong Zhang, T. Bader, H. V. van Roermund, Jingsui Yang","doi":"10.46427/gold2020.3089","DOIUrl":"https://doi.org/10.46427/gold2020.3089","url":null,"abstract":"Due to the high density at mantle depths, subducted oceanic crust rarely exhumes to the surface of Earth, making it hard to acknowledge the evolution and dynamic behavior of oceanic crust. The Sumdo eclogite-bearing metamorphic belt, lying between the north and south Lhasa terranes, is a natural laboratory to study the metamorphic evolution of oceanic eclogites. For the newly discovered Xilang eclogite in the Sumdo metamorphic belt, Tibet, we combined phase equilibrium modeling with detailed petrological investigations and obtained near-peak metamorphic conditions of 539 °C at 1.84 GPa and a fast exhumation P-T path with a steep slope, which is much lower than the eclogites in the other areas of the Sumdo metamorphic belt. Quartz inclusions sealed in garnet from high-pressure rocks are known to preserve residual pressures during fast exhumation, which can be used as an indicator of the peak metamorphic conditions of eclogites. Quartz from four different areas in the belt, including Xilang, Sumdo, Jilang, and Xindaduo, have been measured by laser Raman micro spectroscopy. Xilang eclogite preserved the highest residual pressure of 0.53 ± 0.07 GPa in the quartz stability field. A comparison of the residual pressures between eclogites from different areas reveals a positive relationship of the residual pressure and the peak metamorphic conditions for the areas with similar exhumation processes. The exhumation duration of the host rocks also controls the residual pressures, which confirmed the previous numerically modeling of the mechanical solutions of viscous relaxation in the host mineral. It indicates that the systematic investigation of residual pressures may be a new way to get geochronological information in addition to isotopic investigations.","PeriodicalId":12817,"journal":{"name":"Goldschmidt Abstracts","volume":"240 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74902387","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Insights from olivine oxygen isotope compositions into the mantle sources of picrites from the Karoo LIP KIERAN A. ILES*, ARTO V. LUTTINEN, MARTIN J. WHITEHOUSE 1 Finnish Museum of Natural History, Univeristy of Helsinki, P.O. Box 64, 00014 Helsinki, Finland (*correspondence: kieran.iles@helsinki.fi) 2Department of Geosciences, Swedish Museum of Natural History, P.O. Box 50 077, 10405 Stockholm, Sweden
KIERAN A. ILES*， ARTO V. LUTTINEN, MARTIN J. WHITEHOUSE 1芬兰自然历史博物馆，赫尔辛基大学，邮政信箱64,00014(*通信:kieran.iles@helsinki.fi) 2瑞典自然历史博物馆，邮政信箱50 077,10405，斯德哥尔摩
{"title":"Insights from Olivine Oxygen Isotope Compositions into the Mantle Sources of Picrites from the Karoo LIP","authors":"Kieran A. Iles, A. Luttinen, M. Whitehouse","doi":"10.46427/gold2020.1132","DOIUrl":"https://doi.org/10.46427/gold2020.1132","url":null,"abstract":"Insights from olivine oxygen isotope compositions into the mantle sources of picrites from the Karoo LIP KIERAN A. ILES*, ARTO V. LUTTINEN, MARTIN J. WHITEHOUSE 1 Finnish Museum of Natural History, Univeristy of Helsinki, P.O. Box 64, 00014 Helsinki, Finland (*correspondence: kieran.iles@helsinki.fi) 2Department of Geosciences, Swedish Museum of Natural History, P.O. Box 50 077, 10405 Stockholm, Sweden","PeriodicalId":12817,"journal":{"name":"Goldschmidt Abstracts","volume":"82 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78241181","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
N. Easton, M. Cooper, S. Bray, F. Bulot, S. Cox, Steven J. Ossont, Gavin Foster, M. Loxham
of mediators from exposed 16HBE cells. Across all samples there was significant association between PM V and Ni concentrations, and the release of multiple inflammatory mediators, and an inverse association with cell viability. These results show port-derived PM has source-related elemental profiles, enabling a future source apportionment study. Toxicological results suggest the UF fraction of shipping PM may pose a heightened risk to health.
{"title":"Source Specific Chemical and Toxicological Profiles of Port-Derived Particulate Matter","authors":"N. Easton, M. Cooper, S. Bray, F. Bulot, S. Cox, Steven J. Ossont, Gavin Foster, M. Loxham","doi":"10.46427/gold2020.638","DOIUrl":"https://doi.org/10.46427/gold2020.638","url":null,"abstract":"of mediators from exposed 16HBE cells. Across all samples there was significant association between PM V and Ni concentrations, and the release of multiple inflammatory mediators, and an inverse association with cell viability. These results show port-derived PM has source-related elemental profiles, enabling a future source apportionment study. Toxicological results suggest the UF fraction of shipping PM may pose a heightened risk to health.","PeriodicalId":12817,"journal":{"name":"Goldschmidt Abstracts","volume":"32 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78415833","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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