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Showing 1 to 7 of 7 for “"calcite veins"”.
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Geochemical fingerprinting of carbonate wall rock alteration at major base metal sulphide deposits in the Otavi Mountain Land, Namibia
… carbonate alteration in the form of dolomite and calcite veins, carbonate recrystallisation, calcitisation and carbonate silicification. Optical cathodoluminescence imaging, electron probe micro analysis, X-ray fluorescence spectrometry, X-ray diffraction, high performance ion chromatography, …
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Structural analysis of the valley and ridge extension of the Parsons Lineament
… Age relations of S1 and S2 cleavages and V2 calcite veins indicate an east-to-west order of thrusting for the Pulaski-Staunton and Saumsville faults. The linear disturbed zone results from displacement transfer at the termination of the Saumsville fault and, together with the structural …
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Patterns of distal alteration zonation around Antamina Cu-Zn skarn and Uchucchacua Ag-base metal vein deposits, Peru : mineralogical, chemical and isotopic evidence for fluid composition, and infiltration, and implications for mineral exploration
… isotopes, and the fluorescent signature of calcite veins associated with the fluids conduits. Two areas were selected for this study: the large Cu-Zn Antamina skarn and the Ag-base metal Uchucchacua vein deposits in the Peruvian Central Andes as these deposits represent the end-members of …
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Fluid flow and deformation history of the Denver basin, CO region: fluid inclusions, U-Pb geochronology and isotope geochemistry of calcite-filled fracture cements in the Niobrara Formation
The Colorado Front Range and adjacent Denver basin host a complex fracture network mainly formed during the Laramide orogeny initiating in the Late Cretaceous to middle Cenozoic by orogenesis, basin formation, and burial. The fracture network (e.g., joints, faults, open stylolites) acted as …
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Paragenetic Evolution of the Robertson Deposit: Eocene Intrusion Related Gold Deposit in the Northern Shoshone Range, Nevada
… alteration. Petrographic observations of veins at Robertson indicate the succession of three main stages referred as 1) pre-gold, 2) syn-gold, and 3) post-gold. The pre-gold stage includes barren quartz veins, potassic alteration veins comprised of biotite veinlets and quartz-K-feldspar, …
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Large-scale hydrothermal dolomitisation in the southwestern Cantabrian Zone (NW Spain) : causes and controls of the process and origin of the dolomitising fluids
… development of bedding parallel stylolites and calcite veins. The dolomitisation post-dated the main Variscan compressinal event in the study area (Westphalian B - Stephanian B) and pre-dated the precipitation of ore minerals (~280-260 Ma). The dolomite bodies display irregular morphology and …
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The magmatic-hydrothermal fluid history of the Harrison Pass Pluton, Ruby Mountains, NV: implications for the Ruby Mountains-East Humboldt Range metamorphic core complex and Carlin-type Au deposits
… pegmatites, aplites, miarolitic cavities, quartz veins, and multiple types of hydrothermal alteration, coupled with data from fluid inclusion microthermometry, LA-ICP-MS fluid inclusion geochemistry, and oxygen stable isotopes from magmatic and hydrothermal quartz, demonstrate that two-stage …