Goldschmidt Abstracts最新文献_第7页

Characteristics of Bayern Fluid Inclusions Bayern流体包裹体的特征

Goldschmidt Abstracts Pub Date : 2020-01-01 DOI: 10.46427/gold2020.3024

R. Ye, Y. Bai

引用次数: 0

Distribution of Natural Uranium in Subsurface Sediment and Groundwater Resources in Southwest Parts of Punjab State, India 印度旁遮普邦西南部地下沉积物和地下水资源中天然铀的分布

Goldschmidt Abstracts Pub Date : 2020-01-01 DOI: 10.46427/gold2020.523

D. Das, R. Bala

{"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}

引用次数: 0

Source to Sink Dynamics in the Southern Neotethys: Exemplified by a Chemical Study of Triassic-Miocene Sandstones from Cyprus 新特提斯南部源汇动力学:以塞浦路斯三叠纪-中新世砂岩化学研究为例

Goldschmidt Abstracts Pub Date : 2020-01-01 DOI: 10.46427/gold2020.380

Guohui Chen, A. Robertson

引用次数: 0

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 500 ~ 300℃、50 ~ 20 Mpa半开放流动体系的流-岩反应实验:对斑岩铜矿床钾成矿带形成及矿化共存的启示

Goldschmidt Abstracts Pub Date : 2020-01-01 DOI: 10.46427/gold2020.1487

Jianping Li, Huayong Chen, Long Su

引用次数: 0

Climate Forcing on Millennial, Orbital and Million Year Scales: A Case Study from the Toarcian Oceanic Anoxic Event 千禧年、轨道和百万年尺度上的气候强迫:以托瓦西安海洋缺氧事件为例

Goldschmidt Abstracts Pub Date : 2020-01-01 DOI: 10.46427/gold2020.1274

D. Kemp, K. Izumi, Wenhan Chen, S. Jin, Wesley T. Fraser

引用次数: 0

Metamorphic Evolution and Exhumation Processes of the Newly Discovered Xilang Eclogite in Tibet—constraints from Phase Equilibrium Modeling and Raman Microspectroscopy 西藏新发现西朗榴辉岩的变质演化与发掘过程——来自相平衡模型和拉曼显微光谱的约束

Goldschmidt Abstracts Pub Date : 2020-01-01 DOI: 10.46427/gold2020.3089

Cong Zhang, T. Bader, H. V. van Roermund, Jingsui Yang

{"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}

引用次数: 0

Catalytic Hydrogenation Effect of Deep Derived Fluid on over-Mature Kerogen: Evidence from Closed System Pyrolysis 深源流体对过熟干酪根的催化加氢作用:来自封闭体系热解的证据

Goldschmidt Abstracts Pub Date : 2020-01-01 DOI: 10.46427/gold2020.1100

Xiaowei Huang, Zhijun Jin, Quanyou Liu, Q. Meng, Jiayi Liu

引用次数: 0

Insights from Olivine Oxygen Isotope Compositions into the Mantle Sources of Picrites from the Karoo LIP 卡鲁LIP橄榄石氧同位素组成对苦橄辉岩地幔来源的启示

Goldschmidt Abstracts Pub Date : 2020-01-01 DOI: 10.46427/gold2020.1132

Kieran A. Iles, A. Luttinen, M. Whitehouse

引用次数: 0

Arsenic Sequestration by Pyrite Framboids 黄铁矿对砷的固存作用

Goldschmidt Abstracts Pub Date : 2020-01-01 DOI: 10.46427/gold2020.971

Y. Hashimoto