نتایج جستجو برای: alteration index

تعداد نتایج: 439976  

Journal: :journal of mining and environment 2015
kh. maroufi naghadehi a. hezarkhani k. seifpanahi shabani

taknar deposit is located about 28 km to the north-west of bardaskan in the khorasan-e-razavi province, which is situated in the north-eastern part of iran. this deposit is unique, formed within the taknar formation in the ordovician time. as a result, it is of much interest to many researchers working in this field. by choosing the lithogeochemical study performed to recognize new exploration ...

جبارزاده, زهره , حسین‌زاده, محمدرضا , فرامرزی, رزگار , مؤید, محسن ,

The Yaralujeh vein index is located about 40 km NW of Ahar, East Azarbaijan. The host rock of mineralized vein is an altered subvolcanic body, intermediate in composition. The mineralization of sphalerite-galen-chlcopyrite recognized as intersected veinlets. Based on field observations, textural and mineralogical evidences, the mineralization occurred in 4 stages. The subvolcanic rocks are affe...

Khodami, , Tajbakhsh, ,

Altered quartz feldspathic rocks and associated soils with the felsic source rock crops out in different areas of the Yazd Province, and are used as ceramic, porcelain and glass raw materials. Alteration products in the igneous rocks of the Cambrian Rizo series (Zarrin and Tut), Precambrian metagranites (Saghand), post-Jurassic leucogranites (Khezrabad) and Neogene Dacites (Abdolah) were invest...

Journal: :Journal of the Japanese Association for Petroleum Technology 1996

Journal: :The Journal of clinical investigation 1966
M B Mathews S Glagov

Journal: :زمین شناسی اقتصادی 0
محسن علیخانی غلامحسین شمعانیان محمد جعفری زنگلانلو

the tajroud vein system is located 190 km southwest of mashhad, and in the southern part of the sabzevar zone. the vein host rocks consist of eocene intermediate to silicic volcanic rocks. the mineralization occurs as open space filling, taking place as veins, veinlets and hydrothermal breccias. based on field geology and textural evidence, three main stages of mineralization were identified. s...

The Haft-Savaran Pb-Zn mineralization zone with the lower Jurassic age is located in the southern basin of Arak and Malayer-Isfahan metallogenic belt of Iran. Based upon the geological map of the Haft-Savaran area, the sandstone and shale of lower Jurassic are the main rocks of Pb-Zn deposit. In this area, 170samples were taken from 33 boreholes, and44 elements were measured by the ICP-MS metho...

2009
E. E. Palmer

Introduction: Kamacite grains corrode into tochilinite, an iron sulfide-hydroxide, if exposed to S-bearing water [1]. We evaluated this reaction in CM chondrites in order to determine the extent of aqueous alteration in these meteorites. Method: We looked at thin sections of Murchison, Cold Bokkeveld, Nogoya and Murray using optical microscopy and electron microprobe analysis (EMPA). We collect...

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