نتایج جستجو برای: phyllite

تعداد نتایج: 124  

Journal: :Remote Sensing 2017
Shengwen Qi Yu Zou Faquan Wu Changgen Yan Jinghui Fan Mingdong Zang Shishu Zhang Ruyi Wang

Forty-six ancient Tibetan star-shaped towers and a village are located on a giant slope, which would be partially flooded by a nearby reservoir currently under construction. Ground survey, boreholes, and geophysical investigations have been carried out, with results indicating that the slope consists of loose deposit with a mean thickness of approximately 80 m in addition to an overlying bedroc...

2009
N. Janardhana Raju Sangita Dey Kaushik Das

Fluoride (F ̄) concentration over and above the permissible limits (1.5 mg/l) in drinking water leads to human health hazards, such as dental and skeletal fluorosis affecting millions of people in many parts of India. Preliminary investigations indicate that severe health disorders have been identified in parts of the Kachnarwa region, which is in the upper Panda river basin, Sonbhadra District,...

Journal: :Remote Sensing 2022

Understanding the spatiotemporal evolution and driving mechanisms of landslides following a mega-earthquake at catchment scale can lead to improved landslide hazard assessment reduced related risk. However, little effort has been made undertake such research in Wenchuan earthquake-affected region, outside Sichuan Province, China. In this study, we used Goulinping valley Bailong River basin sout...

Journal: :Minerals 2022

Hydrothermal gold mineralization is commonly associated with metasomatic processes resulting from interaction of hostrock infiltrating hot aqueous fluids. Understanding the alteration mechanism requires quantification element changes in altered rock, relative to unaltered or least-altered representing protolith. Balanced mineral reactions are used gain quantitative insight into process at Awak ...

2007
H P. TAYLOR

O's/O •6 ratios of thirteen tektites from Czechoslovakia, Libya, Texas, Indochina, Philippine Islands, Australia, Java, and Peru have been determined by the fluorine-extraction technique. All but one of these lie in relatively restricted range of Oas/O •6 ratio, with $ -9.6 to 10.4 per mil relative to the ocean-water standard. Tektites are therefore 0.5 to 1.5 per mil heavier than average grani...

2002
Christian Koeberl Cambria Denison Richard A. Ketcham Wolf Uwe Reimold

[1] High-resolution X-ray computed tomography (HRXCT) is a nondestructive method used to study the interiors of opaque solid objects. Here we present the results of a first application of the HRXCT method to imaging the interior of impactites, in particular, suevites (glass-bearing impact breccias) from the Bosumtwi (Ghana) and Ries (Germany) craters and a Muong Nong–type tektite from Thailand....

Journal: :Frontiers in Earth Science 2023

Many studies are currently focusing on the mechanical properties of granite from macroscopic and microscopic perspectives, but only several influence rock mineral composition using a combined macro-micro assessment. The biotite in Gaoligong Mountains was selected as research object, variation strength characteristics at 20–130°C were obtained through uniaxial compression experiments. rock’s com...

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