Detrital zircon as a proxy for tracking the magmatic arc system: The California arc example

被引：110

作者：

Barth, A. P. ^{[1
]}

Wooden, J. L. ^{[2
]}

Jacobson, C. E. ^{[3
]}

Economos, R. C. ^{[4
]}

机构：

[1] Indiana Univ Purdue Univ Indianapolis, Dept Earth Sci, Indianapolis, IN 46202 USA

[2] Stanford Univ, Dept Geol & Environm Sci, Stanford, CA 94305 USA

[3] Iowa State Univ, Dept Geol & Atmospher Sci, Ames, IA 50011 USA

[4] Univ Calif Los Angeles, Dept Earth & Space Sci, Los Angeles, CA 90095 USA

来源：

GEOLOGY | 2013年 / 41卷 / 02期

基金：

美国国家科学基金会;

关键词：

MCCOY MOUNTAINS FORMATION; SOUTHEASTERN CALIFORNIA; SIERRA-NEVADA; EVOLUTION; PLUTONISM; PROVENANCE; MARGIN;

D O I：

10.1130/G33619.1

中图分类号：

P5 [地质学];

学科分类号：

0709 ; 081803 ;

摘要：

Coupled age and trace element geochemical analyses of detrital zircons provide criteria that may be applied to describe average melt compositions through virtually the entire history of a long-lived magmatic arc. Detrital zircon data suggest that the California (western United States) Cordilleran arc was characterized by five mean magmatic states. Three geochemically distinct pulses were characterized by high Th/U and progressively heavy rare earth element (HREE)-depleted melts. The first and last pulses were also characterized by higher than average U/Yb, suggesting that progressive crustal thickening coupled with variable fluid inputs from the subducting slab modulated pulse volumes. Lulls between pulses were states generally characterized by low magmatic volumes and low Th/U and U/Yb, suggesting fluid-poor conditions with minimized crustal involvement in magmatism.

引用

页码：223 / 226

页数：4

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