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A tectonic model for the spatial occurrence of porphyry copper and polymetallic vein deposits - applications to Central Europe

Scientific Investigations Report 2005-5272

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Abstract

A structural-tectonic model, which was developed to assess the occurrence of undiscovered porphyry copper deposits and associated polymetallic vein systems for the Matra Mountains, Hungary, has been expanded here and applied to other parts of central Europe. The model explains how granitoid stocks are emplaced and hydrothermal fluids flow within local strain features (duplexes) within strike-slip fault systems that develop in continental crust above subducting plates. Areas of extension that lack shear at the corners and along the edges of the fault duplexes are structural traps for the granitoid stocks associated with porphyry copper deposits. By contrast, polymetallic vein deposits are emplaced where shear and extension are prevalent in the interior of the duplexes. This model was applied to the Late Cretaceous-age porphyry copper and polymetallic vein deposits in the Banat-Timok-Srednogorie region of Romania-Serbia-Bulgaria and the middle Miocene-age deposits in Romania and Slovakia. In the first area, porphyry copper deposits are most commonly located at the corners, and occasionally along the edges, of strike-slip fault duplexes, and the few polymetallic vein deposits identified are located at interior sites of the duplexes. In the second area, the model accounts for the preferred sites of porphyry copper and polymetallic vein deposits in the Apuseni Mountains (Romania) and central Slovakian volcanic field (Slovakia).

Additional Publication Details

Publication type:
Report
Publication Subtype:
USGS Numbered Series
Title:
A tectonic model for the spatial occurrence of porphyry copper and polymetallic vein deposits - applications to Central Europe
Series title:
Scientific Investigations Report
Series number:
2005-5272
ISBN:
141130960X
Edition:
-
Year Published:
2006
Language:
ENGLISH
Description:
43 p.