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Geochemical Characteristics and Significance of Major Elements, Trace Elements and REE in Mineralized Altered Rocks of Large-Scale Tsagaan Suvarga Cu-Mo Porphyry Deposit in Mongolia方维萱,杨社锋,刘正桃,韦星林,张宝..., quartz-sericite alteration in the medium phase, and argillization and carbonatization (calcite) in the later phase. Ore-bearing-altered rocks are significantly controlled by the structure and fissure......
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Mineralogical and chemical compositions of glauconite and glauconitic rocks and assumption for the formation of the minerals in the Kyzyltokoy basin, KyrgyzstanTursunai A.Bektemirova1,2,Hu Ruizhong11. State Key Laboratory of Ore Deposit Geochemistry, Institute of Geochemistry摘 要:<正>This study is focused on the mineralogical and chemical......
610059,China;2.School of Environmental Sciences & Engineering,Sichuan University,Chengdu 610065,China) Abstract:Vertisol developed on argillaceous rocks has its special pedogenic processes and properties, and formed some secondary nodules. In study area, contents of rare earth elements (REE) are significantly different in different sedimentary rocks due to varied contents of clay fraction and clay mineral......
Viscoelasto-plastic properties of deep hard rocks under water environment CAO Ping, WAN Lin-hui, WANG Yi-xian, HUANG Yong-heng, ZHANG Xiang-yang School of Resources and Safety Engineering, Central...: water; viscoelasto-plastic property; circular incremental step load and unload; generalized Kelvin model 1 Introduction It is well known that rocks possess viscoelasto- plastic properties and exhibit......
Laser Ablation ICP-MS Titanite U-Th-Pb Dating of the Tonglushan Cu-Fe-Au Skarn Deposit, Southeastern Hubei Province () 摘要: Titanite (CaTi_2SiO_5) is an important accessory mineral not only in magnatic and metamorphic rocks,but also commonly in hydrothermal mineral deposits.It incorporates appreciable amounts (usually 10 ×10~(-6) s to 100 × 10~(-6) s) of U and Th into its structure and has......
Effects of sonic speed ??on location accuracy of acoustic emission source in rocks LI Qi-yue, DONG Long-jun, LI Xi-bing, YIN Zhi-qiang, LIU Xi-ling School of Resources and Safety Engineering... and plane location tests were carried out. A broken pencil was simulated as acoustic emission source in the rocks. The line and plane location tests were carried out in the granite rod using two sensors......
J. Cent. South Univ. (2021) 28: 454-480 DOI: https://doi.org/10.1007/s11771-021-4615-z TBM tunneling in extremely hard and abrasive rocks:Problems, solutions and assisting methods ZHENG Yan-long(郑彦... University Press and Springer-Verlag GmbH Germany, part of Springer Nature 2021 Abstract: Extremely hard and abrasive rocks pose great challenges to the past and ongoing TBM projects by increasing cutter......
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