نتایج جستجو برای: quartz veins

تعداد نتایج: 29821  

Journal: :Geology 2021

Many crystalline rocks of the continental crust contain coarse-grained quartz as a main mineral (e.g., granitoids). Incipient deformation coarse quartz, which likely controls accumulation bulk strain in heterogeneously deformed crustal rock volumes, commonly develops microshear zones (MSZs) localized recrystallization. At mid-crustal conditions, where is mostly accomplished by subgrain rotation...

Journal: :Ore Geology Reviews 2021

The Suyoc prospect is an epithermal vein-type mineralization located at the southern part of Mankayan Mineral District, Northern Luzon, Philippines. prospect’s veins are hosted in volcaniclastic rocks and conglomerate, which belong to Late Oligocene Early Miocene Balili Formation Middle Conglomerate, respectively. These classified into three major types: quartz vein, quartz-sulfide quartz-carbo...

Journal: :Journal of Structural Geology 2021

Exhumation and cooling of upper crustal plutons is generally assumed to develop in the brittle domain, thus determining an abrupt passage from crystallization faulting. To challenge this general statement, we applied integrated approach involving meso- micro-structural studies, thermochronology, geochronology rheological modeling Miocene syn-tectonic Porto Azzurro pluton on Elba (Tuscan archipe...

Journal: :acta medica iranica 0
s. h. mousavi bahar

renal vein thrombosis (rvt) is the most frequent vascular abnormality in newborns, but rarely seen in adults. rvt is an acute problem, and diagnostic and therapeutic approaches should be done immediately. surgical thrombectomy is not a rational approach and the treatment of choice is conservative management and thrombolytic therapy. we present a 45 years old male patient with chronic renal vein...

بومری, محمد, بیابانگرد, حبیب , تیموری, خسرو , محمدپور, فاطمه ,

Roshtkhar Iron deposit is located in southeast of Khorasan Razavi Province about 48 Km east of Roshtkhar. This deposit is geologically located in the northeast of the Lut block in the Khaf-Bardaskan volcanic- plutonic belt. Intermediate igneous rocks such as stock, dyke, lava and pyroclastic deposits are host rock. Igneous rocks are dioritic porphyry, monzosyenitic porphyry, andesite, basalt an...

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