GEOCHEMICAL

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Petrography and Geochemical Studies of Granitoids from Iro Lake South-East of Moyen Chari in Chad and Geodynamic Implication
《Open Journal of Geology》2025年第2期87-108,共22页Leontine Tekoum Djatibeye Barnabe Jean Claude Doumnang Mbaigane 
Located in Southeastern Chad. The Iro lake offers a great opportunity for the study of Precambrian formations and their Phanerozoic cover. Pluton is a Cal-alkaline granite. Due to its geographical location and geologi...
关键词：PETROGRAPHY GEOCHEMICAL GRANITOIDS Iro Lake Moyen-Chari CHAD 
Exploring emerald global geochemical provenance through fingerprinting and machine learning methods
《Artificial Intelligence in Geosciences》2024年第1期202-219,共18页Raquel Alonso-Perez James M.D.Day D.Graham Pearson Yan Luo Manuel A.Palacios Raju Sudhakar Aaron Palke 
Emeralds-the green colored variety of beryl-occur as gem-quality specimens in over fifty deposits globally.While digital traceability methods for emerald have limitations,sample-based approaches offer robust alterna-t...
关键词：BERYL PROVENANCE LA-ICP-MS Machine learning Multivariate analysis Trace elements 
Evaluation of environmental geochemical signatures due to RO rejects on arid agricultural farms and tangible solutions
《Geoscience Frontiers》2024年第6期494-515,共22页Harish Bhandary Chidambaram Sabarathinam Adnan Akber Tariq Rashid Dhanu Radha Samayamanthula Yogeesha Jayaramu Bedour Alsabti 
the Kuwait Foundation for the Advancement of Sciences(KFAS)for funding the study(Grant No.PN20-25EV-01).
The impact of reverse osmosis(RO)rejects in the groundwater presents a significant challenge in arid regions.This study collected groundwater samples,product water,and reverse osmosis brine(ROB)from evaporation ponds ...
关键词：Brine disposal Groundwater GEOCHEMISTRY Monitoring Modeling RECOMMENDATION 
Geochemical and Hydrogeochemical Processes Determining Arsenic Presence in Rocks and Groundwater in the Southeastern Portion of El Bajío Guanajuatense,Guanajuato,Mexico
《Journal of Earth Science》2024年第6期2099-2118,共20页JoséIvan Morales-Arredondo María A.Armienta Hernández Eduardo A.Lugo-Dorantes Fátima Juárez-Aparicio Francisco Romero Zaknite I.Flores-Ocampo 
financed partially by PAPIIT-DGAPA(Contribution IN-105023)。
Several aquifers located in North-Central Mexico have natural arsenic(As)concentrations higher than those allowed by national and international regulations;these aquifers are usually located in fractured volcanic envi...
关键词：arsenic mobilization GROUNDWATER volcanic rocks geothermal aquifer CO_(2) geochemistry HYDROGEOLOGY 
Geochemical Behavior and Enrichment Mechanisms of Arsenic in Low-Rank Coal,Baiyinhua Depression,Erlian Basin
《Acta Geologica Sinica(English Edition)》2024年第6期1574-1585,共12页DAI Guobiao TANG Yuegang LIU Ao WANG Xiaoshuai LI Ruiqing 
financially supported by the State Key Program of the National Natural Science Foundation of China(Grant No.42030807).
In this study,the abundance of trace elements in the Baiyinhua depression coal and its relationship with the coal depositional environment was examined.(1)The content of arsenic in the Baiyinhua depression coal is tha...
关键词：arsenic-rich coal Baiyinhua Depression trace elements geochemical origin 
Spatio-temporal variability in microfossil and geochemical records of Cenomanian-Turonian oceanic anoxic event-2:a review
《Journal of Palaeogeography》2024年第4期646-674,共29页C.P.Sooraj Shweta Gupta Jahnavi Punekar 
supported by The Department of Science and Technology (DST,India)SERB Grant CRG/2018/002202。
The Cenomanian-Turonian boundary oceanic anoxic event(OAE-2;Bonarelli event;~94 Ma)is associated with a species turnover in the marine calcareous microfossil record,widespread marine anoxia,black shale deposition and ...
关键词：Oceanic anoxic Event-2 Global organic carbon distribution Geochemical proxies Marine calcifiers PALAEOCEANOGRAPHY 
Progress and Prospect of Rare Earth Elements Stable Isotope Analysis Techniques
《Journal of Earth Science》2024年第6期2129-2132,共4页Xibin Lu Jianghao Bai Feng Ye Gangjian Wei 
supported by the National Natural Science Foundation of China(Nos.92358301,42403001);the Key Laboratory of Marine Mineral Resources,Ministry of Natural and Resources,Guangzhou(No.KLMMR-2022-G08);China National Postdoctoral Program for Innovative Talents(No.BX20240377);China Postdoctoral Science Foundation(No.2023M743501);Director's Fund of Guangzhou Institute of geochemistry,CAS(No.2023SZJJ-1)。
0 INTRODUCTION Rare earth elements(REEs)are integral to geochemical tracing systems due to their unique geochemical properties.Their distribution patterns,fractionation,anomalies,and radiogenic isotope characteristics...
关键词：GEOCHEMICAL EARTH ISOTOPE 
Sedimentary environment and organic matter accumulation of Wufeng-Longmaxi shales,southwest Yangtze Plate,China:Insights from geochemical and petrological evidence
《China Geology》2024年第4期747-761,共15页An-kun Zhao Dong Wang Qian Zhang Zi-hui Lei Qian Yu Di Zhang Ye-xin Zhou 
jointly funded by the National Key Laboratory of Oil and Gas Reservoir Geology and Exploitation(PLC20210104);China Geological Survey(DD20221661);China National Science and Technology Major Project“Test and Application of Shale Gas Exploration and Evaluation Technology(2016ZX05034004)”。
Upper Ordovician-Lower Silurian Wufeng-Longmaxi Formation is the most developed strata of shale gas in southern China.Due to the complex sedimentary environment adjacent to the Kangdian Uplift,the favorable area for o...
关键词：SHALES Shale gas Sedimentary environment Graptolite Upper Ordovician‒Lower Silurian Organic matter accumulation Radiolarian Geochemical and petrographic evidence Wufeng-Longmaxi Formation Oil-gas exploration engineering Suboxic environment Sichuan Basin Reduced environment Yangtze Plate 
Zircon U-Pb geochronologic,geochemical and Sr-Nd-Pb isotope characteristics of the Beidaban granites in the North Qilian Orogenic Belt:Petrogenesis and tectonic implications
《Acta Geochimica》2024年第6期1087-1104,共18页Tao Yang Zhi-yuan Sun Ming-liang Wang Xiao-qiang Zhu Jing-yu Zhao 
This study was fi nancially supported by the Youth Science and Technology Talent Recruitment Project of Gansu Province(2022-19);Technological Innovation Project of Gansu Provincial Department of Natural Resources(2022-3,2022-4,2022-28);National Natural Science Foundation of China(Nos.42073059 and 42303034);Outstanding Youth Fund of Anhui Provincial Department of Education(No.2022AH020084);Doctoral Startup Foundation of Suzhou University(2021BSK038)。
The tectonic evolution and crustal accretion process of the North Qilian Orogenic Belt(NQOB)are still under debate because of a lack of integrated constraints,especially the identifi cation of the tectonic transition ...
关键词：GRANITOIDS Zircon U-Pb dating Sr-Nd-Pb-isotopes PETROGENESIS North Qilian Orogenic Belt 
Catagenetic type of manganese ores:REE and isotope(δ^(13)C,δ^(18)O)geochemical features(on the example of the Usa deposit,Russia)
《Acta Geochimica》2024年第6期1133-1152,共20页Vladimir N.Kuleshov Andrey Yu.Bychkov Irina Yu.Nikolaeva Maria E.Tarnopolskaia 
accomplished in accordance with the Research Program of the Geological Institute of the Russian Academy of Sciences。
Chemical(REE and major elements)and isotope(δ^(13)C,δ^(18)O)composition of carbonate manganese ores and manganese-bearing carbonates of the Usa deposit(Siberia,Russia)were studied.Received data on the composition of...
关键词：Manganese ore REE Isotope composition CATAGENESIS CAMBRIAN Siberia 
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