نتایج جستجو برای: silicification

تعداد نتایج: 299  

Journal: :Nanophotonics 2023

Abstract Moulding the flow of phononic waves in three-dimensional (3D) space plays a critical role controlling sound and thermal properties matter. To this end, 3D crystals (PnCs) have been considered gold standard because their complete bandgap (PnBG) enables omnidirectional inhibition wave propagation. Nevertheless, achieving PnBG high-frequency regime is still challenging, as attaining corre...

Journal: :Minerals 2023

The Heihaibei gold deposit is located in the Eastern Kunlun Orogen Northwest China. mineralization here occurs predominantly quartz veins within faulted granite zones. sulfide mineral assemblage dominated by pyrite and arsenopyrite, with minor chalcopyrite, galena, sphalerite, tetrahedrite, micro-native gold. Weak alterations granites include silicification sericitization, chloritization carbon...

Journal: :Remote Sensing 2021

The Pulang porphyry copper deposit (PCD), one of the main potential areas for resource exploration in China, exhibits typical alteration zoning. However, further investigation indicative significance minerals, additional insight into metallogenic characteristics, and prospecting guidelines continue to be challenging. In this study, ASTER WorldView-3 data were used map hydrothermal minerals by e...

انتظاری هرسینی, اعظم, سعادت, سعید, مظاهری, سید احمد,

The study area is located about 220 km southwest of Mashhad and 80 km south of Neyshabur, at 54° 42' 15" to 54° 43' 40" longitude. Initially, remote sensing is carried out based on the SAM method and it denotes propylitic, carbonitization, silicification and argillic alterations. This area comprises of outcrops of Paleocen-Eocene volcanics. Golcheshmeh area also shows copper mineralization at s...

غلامی, نرگس, مظاهری, سید احمد, کریم‌پور, محمدحسن ,

The study area is located about 45 km of southwest Neyshabour and east of Arghash village. Both intrusive and volcanic rocks are exposed in the study area and they are intensively altered due to hydrothermal fluid. The alteration zoning in the study area consists of potassic, sericitic, carbonatization, silicification and propylitic. More than 10 intrusive rocks with composition in the range of...

کریمی , مهرداد ,

The variety of lithologies from Late Precambrian to Quaternary and suitable conditions for mineralization caused formation of Zarshuran gold and arsenic deposit in black schists, shale, limestone and dolomite. The ore paragenesis include As, Sb, Fe, Pb, Zn, Hg sulfides and gold along with fluorite, barite and quartz. The most important alteration is silicification which is more obvious in the o...

Journal: :Advanced Functional Materials 2021

The manipulation of cell surfaces in anchorage-dependent cells can help overcome difficulties presented during handling and application. Silica-based protective mechanisms existing free-floating microorganisms may be used as inspiration for sustaining human survival suspension. Gathering on this, herein adipose-derived mesenchymal stem (hASCs) are partially coated with a hard silica layer that ...

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