نتایج جستجو برای: phyllite
تعداد نتایج: 124 فیلتر نتایج به سال:
This paper is a study of the dynamic mechanics and energy dissipation saturated layered phyllite. Using Split-Hopkinson pressure bar system, mechanical properties law sample during loading in test were analyzed. The results show that weakening effect water on phyllite rock body will have great impact its properties, strain rate sensitivity damage mode, fracture dissipation. values parameters su...
A detailed geological study has been carried out in the Lesser Himalayan rocks distributed Panchkhal-Dolalghat- Sukute area Kavre Palanchowk and Sindupalchowk districts. The belongs to Kuncha Formation of Lower Nawakot Group, Benighat Slate Upper Complex; Raduwa Formation, Bhaisedobhan Marble, Kalitar Chisapani Quartzite, Kulikhani Markhu Bhimphedi Group Tistung Phulchauki Kathmandu Complex. Th...
The Xinjiazui gold deposit, a newly discovered is situated in the northwestern margin of Yangtze Block, China. source and genesis mineralization are poorly understood. It urgent to use H–O isotopic composition quartz geochemistry pyrite evaluate origins Au ore-forming fluids this deposit. Three types were identified, including synsedimentary framboidal pyrites (Py0), directional arrangement pre...
Phyllite and quartzite, probably Precambrian, trend meridionally and dip steeply in the New River Gorge above the junction with the Salisbury River in southern Tasmania. Further upstream an association of silty dolomite and conglomerate is less deformed and may be younger. Siliceous conglomerate boulders occur in the New River below the gorge. Late Ordovician carbonates of the Gordon Group are ...
کانی شناسی بخش رس و ژئوشیمی خاکهای تشکیل شده از سنگ های مادری دگرگون و آذرین قلیایی در ناحیه لاهیجان
The mineralogical and geochemical composition of the soils of three representat ive pedons fanned on basaltic andesite, andes itic basalt and phyllite were investigated. Results by XRF showed that progressive weathering of rocks have been marked by gradual accumulation of AI, Fe, Ti, Mg. H30+ and depletion of Na, K, Ca and Si in the soi l; although, predominant clay, loss and gain trend of...
The tectonic significance of the Muness Phyllite, which overlies Unst–Fetlar ophiolite in Shetland, Scottish Caledonides, is poorly understood. U–Pb analyses detrital zircons show that it was deposited after c . 469 Ma. Early Paleozoic grains have εHf values −0.3 to +12.3 and were probably derived from extension Midland Valley arc. Psammite clasts matrix Phyllite contain Proterozoic Archean wit...
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