A5100452521- Geochemistry and Geologic Mapping
- Geological and Geochemical Analysis
- High-pressure geophysics and materials
- earthquake and tectonic studies
- Seismic Waves and Analysis
- Geophysical and Geoelectrical Methods
- Heavy metals in environment
- Geochemistry and Geochronology of Asian Mineral Deposits
- Radioactivity and Radon Measurements
- Geochemistry and Elemental Analysis
- Marine and coastal ecosystems
- Marine and coastal plant biology
- Diatoms and Algae Research
- Geophysical Methods and Applications
East China University of Technology
2022-2023
University of Jinan
2022
This study investigated the distribution features of uranium-238 (238U), radium-226 (226Ra), thorium-232 (232Th), and potassium-40 (40K) evaluated associated environmental radiological hazards topsoil river sediments in Jinding lead-zinc (Pb-Zn) mine catchment from Southwest China. The activity concentrations 238U, 226Ra, 232Th, 40K ranged 24.0 ± 2.29–60.3 5.26 Bq.kg-1, 32.5 3.95–69.8 3.39 15.3 2.24–58.3 4.92 203 10.2–1140 27.4 respectively. highest for all these radionuclides were primarily...
The Chengmenshan Cu-Au deposit is a typical porphyry-skarn in the Middle-Lower Yangtze River Valley Metallogenic Belt (MLYRMB), developing abundant oscillatory zoned andradite. However, physiochemical conditions, hydrothermal evolution and age of skarn formation unknown. This paper presents BSE image, EMPA point analyses, LA-ICP-MS analyses mapping, U-Pb isotope data for andradite from deposit. From core to rim, three generations could be identified (Grt-1, Grt-2, Grt-3). Grt-1 (Adr73-88)...
摘要: 东天山黄山东和黄山西镁铁-超镁铁岩是区域早二叠世大规模幔源岩浆作用的产物,赋存有两个大型岩浆铜镍硫化物矿床.黄山东和黄山西矿床的主要矿体均赋存于超镁铁岩中,其含矿超镁铁岩的成因机制研究对揭示区域铜镍硫化物成矿作用机制具有重要意义.本文对黄山东和黄山西含矿超镁铁岩进行了详细的电子背散射图像研究,发现其斜长石斑晶存在显著的不平衡结构,并系统进行了电子探针成分剖面分析.结果显示斜长石具有剧烈变化的成分环带,其中黄山东超镁铁岩斜长石An值介于48.6~75.6,黄山西含矿超镁铁岩斜长石An值介于44.9~79.2,表明两个矿床含矿超镁铁岩的母岩浆在侵位过程中发生过显著的成分变化.结合黄山东和黄山西镁铁-超镁铁杂岩体地质特征,本文认为高分异镁铁质岩浆的加入导致了低分异超镁铁质岩浆成分发生显著变化,致使岩浆硫化物熔离,以及黄山东和黄山西大型铜镍硫化物矿床的形成. 关键词: 斜长石 / 铜镍硫化物矿床 镁铁-超镁铁岩 黄山东 黄山西 东天山 矿床学
Rare-metal granitic pegmatites are commonly considered to be the results of a combination magmatic and hydrothermal processes. Although crystallization fractionation, magmatic-hydrothermal transition have been extensively investigated, processes involving economically valuable mineralization rare-metals strong fractionation geochemical twins remain controversial. This study documents evolution rare‐metal mineralized using mineral chemistry muscovite columbite-group minerals (CGM) in Dangba...
Rare-elements granitic pegmatites are commonly considered as the results of combination between magmatic and hydrothermal processes. Although crystallization fractionation magmatic-hydrothermal transition (immiscibility melt-melt melt-fluid) have been extensively investigated, processes involving in economically valuable mineralization rare-elements strong geochemical twins remain controversial. Here, we present internal evolution during pegmatite-forming with mineralogy chemistry muscovite...