نتایج جستجو برای: skarn
تعداد نتایج: 376 فیلتر نتایج به سال:
Fe isotopes have been applied to the petrogenesis of ore deposits. However, behavior iron in mineralization porphyry-skarn deposits is still poorly understood. In this study, we report mineral separations (magnetite, pyrite, chalcopyrite and pyrrhotite) from two different skarn deposits, i.e., Tonglvshan Cu-Fe deposit developed an oxidized hydrothermal system Anqing Cu a reduced system. both ca...
İnceleme alanı, Bayburt ilinin kuzeyinde yer alan Aydıntepe İlçesi Gümüşdamla Köyü yakın çevresini kapsamaktadır. Çalışma alanında Kabaköy Formasyonu’nun tortul birimleri ve Kaçkar Granitoyidine ait kayaçlar yüzeyleme vermektedir. Detaylı inceleme yapılan cevherleşme alanı çevresi Eosen yaşlı Granitoyidi ile Formasyonu kontağında bulunmaktadır. Cevherleşmenin parajenezini ağırlıklı olarak manye...
Khut skarn deposit, located in the 50 Km NW of Taft,has formedin the result of Khut granodiorite intrusion into the upper Triassic impure carbonate rocks.Field evidences and mineralogical studies show Khut skarn is calcic type and exoskarn is the major skarn zone in area which associated with ore mineralization.The microprobe analyses show that there are two major types of garnet at garnet-pyro...
The emplacement of Oligo-Miocene age Sheyvardagh intrusive body within the older carbonate and volcanoclastic rocks is responsible for contact metamorphism and creating of Mazraeh deposit in epidote - garnet exoskarn of Western Alborz- lesser Caucasus metallogenic belt. Mineralogical paragenesis consist of magnetite, pyrite, chalcopyrite, bornite, covellite, hematite, goethite and malachite and...
The Pb-Zn-Cu deposit of Ulldemolins occurs within the Carboniferous sedimentary series of the southernmost Catalonian Coastal Ranges. It consists of sulphide-bearing calc-silicate assemblages, with epidote, Ca-amphiboles and Ca-garnet, which develop selectively along a dolomicrite bed near the contact with a granite porphyry. Two mineralisation styles can be differentiated: a) banded and b) irr...
The Seranjic skarn occurs as invading of Late Jurassic intrusive body with granite composition within impure carbonate rocks. Field observation and mineralogical investigations show the exoskarn is the most widespread skarn in the Seranjic skarn and is mostly calcic skarn together with magnesium skarn as a narrow marginal zone. The mineral assemblages indicate two stages of evolutions: the prog...
Studying the activation, migration and precipitation processes of ore-forming elements is essential for understanding genesis mechanisms skarn deposits. A typical profile formed by intrusion Yanshanian granodiorite into Carboniferous carbonate strata was studied. The highly consistent with classic profile, ranging from intrusion, weak alteration belt, belt (inner outer belt) mineralization (mai...
Investigation of skarn zoning, minerals chemistry and conditions for formation exoskarn in Bisheh iron deposit (south Birjand)
The Zaroo Cu-skarn is located NW of Yazd province, within the Cenozoic magmatic belt of Central Iran. The widespread rocks in the region are Eocene age volcanic with granitoids intrusives. The Cretaceous limestones in western parts of West Zaroo are hosted by skarn – marble mineralization. The skarns are distal type and are characterized by assemblage: Clinopyroxene, garnet, ilvaite, vezovianit...
Application of an X-ray fluorescence (XRF) microprobe for the analysis of single grains (80 to 1,000 m in diameter) of Clrich minerals for Br has been evaluated for fluorapatite, chlorapatite, scapolite-group minerals (marialite and meonite) and sodalite. A calibration curve based on the Br contents in four international reference materials has been confirmed by measurements on Brbearing standa...
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