نتایج جستجو برای: greenschist
تعداد نتایج: 222 فیلتر نتایج به سال:
Gasht metamorphic complex is situated in the Talesh mountains of western Alborz range. This metamorphic complex consists mainly of metapelite and metabasite. Metabasites display metamorphic conditions of amphibolite and greenschist facies. Mineralogical paragenesis of greenschists are amphibole, feldspar and epidot and clinopyroxene occures as accessory minerals. The amphibolites of Gasht metam...
Apatite is the most common phosphate mineral in the Esfordi ore body. Euhedral crystal (2-20 cm) of the apatite occurs as an intergrowth in magnetite and hematite, vein and dike. There are two types of apatite in the Esfordi deposit, based on Petrographic studies: primary and secendary. Fresh and altered parts of primary apatite display dark and light color respectively using BSE images. EMP an...
Amphibolites are one of the major rock units in the Posht-e-Badam ophiolite that are formed by metamorphism of basalts. There are tow types of amphibolite in the Posht -e- Badam ophiolite: 1) amphibolites with intermediate plagioclase (first type), amphibole, plagioclase, quartz, sphene, ilmenite, apatite, sericite and epidote, 2) amphibolites with high content of anorthite (second type), amphi...
The pressure–temperature (P–T) evolution of a deformed garnet-bearing granite La Virgen hill, located 25 km south the town Azul, Argentina, was studied as an example slightly peraluminous and granites widespread in Paleoproterozoic Tandilia Belt Rio de la Plata Craton. An early isobaric magmatic–submagmatic cooling path followed by exhumation derived appraisal microstructures, chemical composit...
The mantle rocks from Kadaboura and Madara areas represent sections of dismembered ophiolitic complexes developed during the Neoproterozoic in Eastern Desert Egypt, which is located northwestern corner Arabian–Nubian Shield. comprise serpentinites serpentinized dunites, whereas those consist pyroxenites.Despite serpentinization studied rocks, few relicts primary chromite, olivine pyroxene are p...
Abstract The Dinaric–Hellenic mountain belt bends where two fault systems transect the orogen: (1) dextral Shkoder-Peja Transfer Zone (SPTZ), active sometime between Late Cretaceous and middle Eocene; (2) Normal Fault (SPNF), which accommodated NW–SE directed orogen-parallel extension. SPTZ dextrally offsets nappes by ~ 75 km, a displacement attributed to reactivation of an Early Mesozoic rift ...
The Gol-Gohar metamorphic complex, a part of east Sanandaj-Sirjan zone, is located 55 km southwest of Sirjan. This complex consists of metapelitic, metapsammitic and metacarbonatic rocks. Field and geochemical evidence indicate that these sedimentary protolith sequences were composed of shale and sandstone alternation with carbonate layers in the upper parts. In the studied metapelites, garnets...
The Gol-Gohar metamorphic complex, a part of east Sanandaj-Sirjan zone, is located 55 km southwest of Sirjan. This complex consists of metapelitic, metapsammitic, and metacarbonatic rocks. Field and geochemical evidences indicate that these sedimentary protolith sequences are composed of shale and sandstone with alternation of carbonate layers in the upper parts. In the studied metapelites, gar...
The Anjir Khajeh area is located in the southern part of Sanandaj-Sirjan metamorphic belt in northwest of Golgohar iron mine. The rock units of the region include metabasites, metasediments, igneous and sedimentary rocks. Metasedimentary rocks containing mica-schist, garnet schist, and garnet staurolite schist, having metamorphosed into greenschist facies and amphibolite facies. Garnet mineral ...
metagabbro, metadiabase and metabasalt of the chah palang and me'raji mountains associated with lower paleozoic metamorphites are situated in the south of arousan. metabasites of these areas are relatively similar in terms of mineralogy and geochemical characteristics. rock-forming minerals of the me'raji metabasites are feldspar, amphibole, biotite, sphene, epidote, chlorite ± calcite. metagab...
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