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Showing 1 to 7 of 7 for “"Alteration zone"”.
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Geochemical investigation of the hydrothermal alteration zone surrounding the greenstone-hosted Fazenda Brasileiro gold deposit, Bahia, Brasil
Includes bibliographical references (pages 380-393).
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Geochemical investigation of the hydrothermal alteration zone surrounding the greenstone-hosted Fazenda Brasileiro gold deposit, Bahia, Brasil
Includes bibliographical references (pages 380-393).
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Geology, petrology and geochemical characteristics of alteration zones within the Seridune prospect, Kerman, Iran
… least altered porphyritic granodiorite contains zoned plagioclase (An50 20) and hornblende with quartz, biotite, magnetite and minor ilmenite. These mineral phases are set in an interstitial medium grained quartz and plagioclase groundmass. The porphyritic granodiorite is discriminated as a …
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A textural and chemical analysis of the Hanson Lake ore deposit, Saskatchewan
… Composition and gross features of the alteration envelope suggest that the deformation and recrystallization are a result of regional metamorphism and metasomatism during the Kenoran orogeny. The relative age of the ore body in relation to metamorphism indicates the ore was deposited …
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Die Genese der Goldlagerstätte Hira Buddini, Südindien
… narrow ENE- trending steep dipping reverse shear zone at the lithological contact of metabasalt,metadacite and metagabbro. The host rocks are interpreted to have been formed in a sub-seafloor environment of an island arc, which subsequently underwent deformation and metamorphism. A prograde …
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Quartz-kyanite pods in Proterozoic rocks in northern New Mexico : shear zone formation along an older hydrothermal alteration horizon
… are discontinuous, lenticular, symmetrically zoned, and are stratiform within a map-scale sericitic horizon. Previous studies have not resolved whether the high-Al bulk composition of the quartz-kyanite pods was the result of weathering, hydrothermal alteration, or shearing. Geochemical …
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Fluid evolution, vein formation and alteration associated with a low angle shear zone at the northern Variscan fold-and-thrust belt in the vicinity of the Aachen Geothermic-drilling, Western Germany
… fluid inclusions in hydrothermal veins and the alteration mineralogy were performed on samples from the RWTH-1 geothermic well. A detailed textural, structural and fluid inclusion study of distinct vein generations has been performed to correlate the temperature-pressure conditions of vein …