Re-Os isotopic dating of molybdenites in the Xiaoliugou W (Mo) deposit in the northern Qilian mountains and its geological significance

Authors
Mao, JW Zhang, ZC Zhang, ZH Du, AD
Citation
Jw. Mao et al., Re-Os isotopic dating of molybdenites in the Xiaoliugou W (Mo) deposit in the northern Qilian mountains and its geological significance, GEOCH COS A, 63(11-12), 1999, pp. 1815-1818
Citations number
23
Categorie Soggetti
Earth Sciences
Journal title
GEOCHIMICA ET COSMOCHIMICA ACTA
ISSN journal
00167037 → ACNP
Volume
63
Issue
11-12
Year of publication
1999
Pages
1815 - 1818
Database
ISI
SICI code
0016-7037(199906)63:11-12<1815:RIDOMI>2.0.ZU;2-I
Abstract
The Xiaoliugou is a large-scale W (Mo) deposit newly explored in the Northe rn Qilian Mountains Caledonian fold belt, Northwestern China. It is a vein and skarn type deposit genetically associated with the Xiaoliugou Caledonia n granodiorite stock. Re-Os isotopic dating for the molybdenite in the depo sit yields an isochron age of 462 +/- 13 Ma (2 sigma) and model ages of 436 to 496 Ma. These results suggest that W-Mo mineralization occurred before the collision of plates, and mineralized substances mainly originated from the crust. Copyright (C) 1999 Elsevier Science Ltd.