U-Pb dating of MVT ore-stage calcite: implications for fluid flow in a Mesozoic extensional basin from Iberian Peninsula

被引：47

作者：

Grandia, F ^{[1
]}

Asmerom, Y

Getty, S

Cardellach, E

Canals, A

机构：

[1] Univ Autonoma Barcelona, Dept Geol, Edifici C, Bellaterra 08193, Spain

[2] Univ New Mexico, Dept Earth & Planetary Sci, Albuquerque, NM 87131 USA

[3] Colorado Coll, Dept Geol, Colorado Springs, CO 80903 USA

[4] Univ Barcelona, Dept CMDM, E-08028 Barcelona, Spain

来源：

JOURNAL OF GEOCHEMICAL EXPLORATION | 2000年 / 69卷

关键词：

U-Pb dating; calcite; MVT deposits; fluid flow;

D O I：

10.1016/S0375-6742(00)00030-3

中图分类号：

P3 [地球物理学]; P59 [地球化学];

学科分类号：

0708 ; 070902 ;

摘要：

Fluid how responsible for the formation of Mississippi Valley-type (MVT) deposits in the Cretaceous Maestrat Basin (Eastern Spain) has been constrained by means of U-Pb dating of cogenetic calcite and galena. A precise age (62.6 +/- 0.7 Ma) has been obtained from an isochron that combines ore-stage calcite and galena from the Avecilla Mine. Unlike most MVT deposits, which are related to orogenic tectonic settings, the reported age indicates that Zn-Pb ores in the Maestrat Basin precipitated during rift or post-rift stages in Early Tertiary times. This study confirms that calcite-galena isochrons can be an effective tool to date MVT deposits. (C) 2000 Elsevier Science B.V. All rights reserved.

引用

页码：377 / 380

页数：4

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