Geochemical studies of gold-silver-tellurium mineralization in the vicinity of Sacaramb, southern Apuseni Mountains, Romania; some preliminary results

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Authors:Alderton, D. H. M.; Simon, G.; Ioan, M.; Panazan, I.; Orlandea, Eugen; Csibi, I.
Author Affiliations:Primary:
Royal Holloway, Department of Geology, Egham, United Kingdom
Volume Title:Romanian Journal of Mineralogy
Source:Romanian Journal of Mineralogy, Vol.78, p.31-38. Publisher: Geological Institute of Romania, Bucharest, Romania. ISSN: 1220-5621
Publication Date:1997
Note:In English. 13 refs.; illus., incl. 1 table
Summary:The Au, Ag, Te deposits of this region occur in veins in Neogene hornblende andesite stocks and lava flows, which are heavily altered near the mineralized veins. Analyses are presented of the andesites and ore alteration assemblage for major, minor and trace elements, which are also figured in a chondrite-normalized incompatible element spidergram. Strontium isotopes of the fresh and hydrothermally altered andesites are discussed; an approximate age of 8 m.y. for the andesites and mineralization is derived from stratigraphic information. The veins show the following paragenesis: early pyrite > sphalerite + galena > sulphosalts and Au/Ag tellurides > rhodochrosite + calcite. From stable isotope data, quartz and calcite are not in isotopic equilibrium and were deposited at different T or from fluids of different composition. The polymetallic polyphase Au-Ag-Te mineralization and hydrothermal alteration indicate an epithermal, precious metal island-arc type of setting. [R.K.H.]
Sections:Geochemistry
Subsections:Minerals and ores
Subjects:Alkaline earth metals; Andesites; Carbon; Fluid inclusions; Gold ores; Host rocks; Igneous rocks; Inclusions; Isotopes; Major elements; Metal ores; Metals; Mineralization; Oxygen; Silver ores; Spectra; Strontium; Tellurium ores; Trace elements; Veins; Volcanic rocks; X-ray fluorescence spectra; Apuseni Mountains; Europe; Romania; Southern Europe; Sacaramb Romania
Abstract Numbers:00M/1716
Record ID:2002073841
Copyright Information:GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United Kingdom, Twickenham, United Kingdom, Reference includes data from Geoline, Bundesanstalt fur Geowissenschaften und Rohstoffe
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