نتایج جستجو برای: type granite
تعداد نتایج: 1345298 فیلتر نتایج به سال:
The Jiajika rare metal deposit contains the largest area of granitic pegmatite-type deposits in China. X03 vein is an immense dominated by lithium, which was found recent years. contact metamorphic belt tourmalinization and petrochemistry widely developed its wall rocks, altered rocks formed contain Li other mineralization. In this paper, tourmaline different divided into four types: two-mica q...
The gold-bearing prospect area at Gharehchay is located in about 2 km south of Tikmehdash, East-Azarbaidjan, NW Iran. The host rocks of the gold-bearing quartz veins/veinlets are principally Eocene andesites and upper Eocene-Oligocene felsic intrusive body (granite to alkali granite). Wall rocks alteration haloes developed around the veins/veinlets are mainly of silicic, phyllic, phyllic-argill...
We examined differences in the radioactive characteristics among the main minerals forming granite materials. Using a non-toxic high-density agent, minerals were separated from rock (granite-gneiss) and soil (weathered granite) samples. The natural radioactivity ((238)U and (226)Ra) and radon emanation fraction of the minerals were then studied by gamma-ray spectrometry. The radon emanation fra...
11 Abstract 12 13 Coating building materials with anti-graffiti treatments hinders or prevents spray paint 14 adherence by generating low energy surfaces. This paper describes the effect of coating 15 cement paste, lime mortar, granite, limestone and brick with two anti-graffiti agents (a 16 water-base fluoroalkylsiloxane, “Protectosil Antigraffiti®”, and a Zr ormosil) on the 17 dispersive comp...
Petrographical studies examining the development and variations of sub-solidus reactions recorded in the Toki granite represent the three-dimensional cooling pattern of this zoned pluton in Central Japan. Samples collected from 19 boreholes in the Toki granite show characteristics indicative of spatial variations in the extent of the sub-solidus reactions. Exsolution coarsening has produced mic...
The Precambrian rocks in western Ethiopia consist of highand low-grade terranes intruded by granitoids with a wide compositional spectrum. The formation ages of these granitoid rocks are, so far, poorly understood. Single-grain zircon Pb/Pb evaporation and conventional U/Pb dating conducted on four granitoids places time constraints on their emplacement and tectonothermal events. Three granitoi...
Reports of radiation from granite counter tops generated public interest in the potential exposures to external gamma radiation and internal exposure from radon decay products created by building materials. The gamma radiation, radionuclide content and surface dose rates were measured in 322 slabs of 254 named stone types (area ~50 ft per slab) and 14 smaller samples (area ~1 ft). Average surfa...
Controversy surrounds the genetic relationship between gold mineralization and magmatism, especially in deposits granite. Jiaodong Peninsula is leading province China, most are Mesozoic granites; moreover, debate on genesis persists. In eastern Jiaodong, Muping–Rushan belt produces mainly quartz–sulfide vein-type gold, Upper Jurassic Kunyushan granite Late Lower Cretaceous Sanfoshan wall rock. ...
Within the framework of responsible mining, a SOLSA project (www.solsa-mining.eu) to develop an in-situ tool allowing a quick mineralogical identification of site drill cores has been recently launched. Its objective is to develop new or improved highly-efficient and cost-effective, sustainable exploration technologies. It combines and integrates nondestructive sensors: X-ray fluorescence, X-ra...
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