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East asian gold: Deciphering the anomaly of phanerozoic gold in precambrian cratons

Economic Geology

By:
, , , and
DOI: 10.2113/gsecongeo.102.3.341

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Abstract

Early Cretaceous orogenic gold deposits in eastern Asia are globally unique in that large Phanerozoic lode gold deposits occur in Archean-Paleoproterozoic cratons. In the northern Pacific region, ca. 125 Ma orogenic gold deposits in the North China, Yangzte, and Siberian craton margins, as well as in young terranes in California, may ultimately relate to the giant Cretaceous mantle plume in the southern Pacific basin and the relatively rapid tectonic consequences along both continental margins from resulting Pacific plate reconfigurations. In eastern Asia, such consequences include reactivation of and fluid flow along major fault systems, with fluid focusing into simultaneously forming, isolated core complexes of uncertain genesis. Deposition of gold ores in previously devolatilized high-grade Precambrian metamorphic rocks requires an exotic source of ore fluid, most likely subducted Mesozoic oceanic crust and/or overlying sediment. An implication is that Phanerozoic metamorphic core complexes in other destabilized craton margins could host large gold resources. ?? 2007 by Economic Geology.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
East asian gold: Deciphering the anomaly of phanerozoic gold in precambrian cratons
Series title:
Economic Geology
DOI:
10.2113/gsecongeo.102.3.341
Volume
102
Issue:
3
Year Published:
2007
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Economic Geology
First page:
341
Last page:
345
Number of Pages:
5