نتایج جستجو برای: actinolite
تعداد نتایج: 166 فیلتر نتایج به سال:
Lower Paleozoic metabasites of south Chah Palang are located in north of the Yazd block in Central Iran with limited distribution and are associated with Doshakh metamorphites. Metabasites divided in to two portions: metavolcanics, and metagabbro, amphibolite and metadiabase masses. Metavolcanic with basaltic composition are presented by foliation and vesicles filled by calcite. Amphibole, plag...
The results of microprobe analysis indicate four different kinds of amphiboles in Astaneh pluton and its subvolcanic rocks in the Sanandaj-Sirjan zone. The composition of these amphiboles in this area are magnesio hornblende in tonalite and quartz dioritic enclaves, actinolite in granodiorite and monzogranite, pargasite in dacititc enclaves and anthophillite in one tonalitic sample formed by re...
Abstract Unravelling the genesis of metamorphosed mineral deposits can be complicated due to difficulties in separating between primary features and that formed during metamorphic overprint. Such uncertainty exists for stratabound dolomite- skarn-hosted Zn-Pb-Ag sulfide 1.89 Ga rocks Bergslagen lithotectonic unit (BLU) Sweden, where a metasomatic vs. regional origin skarns has long been discuss...
metabasites and serpentinites of the ophiolitic sequence of the gimigliano-mount reventino unit(calabria, southern italy), also known as greenstones, are employed and marketed for building and ornamentalpurposes since prehistorical times. the main topic of our research focuses on the occurrence, within the abovelithotypes, of asbestiform minerals that may be potentially harmful for human health...
Abstract New mineralogical, geochemical, and geochronological data are presented for the Island Dam prospect, Olympic Cu-Au Province, South Australia. Skarn assemblages comprising actinolite/phlogopite + K-feldspar magnetite suggest presence of calcareous protoliths at indicate high-temperature alkali-calcic alteration in early stages IOCG mineralization, as seen other deposits region. Dating l...
Serpentinite rocks testify to the ocean-floor metamorphism that took place and transformed original mineralogy fabric of previous ultramafic rocks. Due their tectonic petrological importance, in recent decades, there has been increasing interest serpentinites. From economic point view, it is worth noting that, due beauty attractiveness, serpentinite have exploited traded as building ornamental ...
The Cheshme-Bid Granitoids is located in SE Zahedan, Sistan and Balouchestan P Province. These granitoids are in Middle Eocene Neh metamorphosed flysch zone. The main minerals in these granites are quartz, plagioclase, biotite and amphiboles. Based on microprobe analysis, amphiboles are calcic in composition and set on magnesio-hornblende and actinolite classes. Based on chemical classificat...
Spid pluton with Neogene age outcrop in the Urumieh-Dokhtar Magmatic belt. Amphibole in this intrusion is calcic and magmatic and its composition corresponds to magnesiohornblende to actinolite which reflects the type I granitoid. Geobarometry calculations show that the amphibole crystalized at pressure of 2.5 to 3.7 kbr corresponding to a depth of 8 to 12 km. Based on geothermometry of hornble...
The Bazman granitoid is located in the south margin of Lut block, and southeastern of Iran. It composed of granite, granodiorite, monzodiorite, quartz monzodiorite, diorite and gabbro. Plagioclase, feldspar, quartz, hornblende and biotite are the major minerals; sphen, apatite, zircon, magnetite and ilmenite are the main accessory minerals. Amphibole mineral chemistry is calcic in composition a...
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