Detrital Zircon U-Pb Geochronology Applied to Tectonics

被引:628
作者
Gehrels, George [1 ]
机构
[1] Univ Arizona, Dept Geosci, Tucson, AZ 85721 USA
来源
ANNUAL REVIEW OF EARTH AND PLANETARY SCIENCES, VOL 42 | 2014年 / 42卷
基金
美国国家科学基金会;
关键词
tectonics; detrital zircons; U-Pb geochronology; provenance; maximum depositional age; LASER-ABLATION ICPMS; GREAT VALLEY GROUP; SEDIMENTARY PROVENANCE; CONTINENTAL-CRUST; CALIFORNIA RIVER; EARLY EVOLUTION; JACK HILLS; LU-HF; AGES; RECORD;
D O I
10.1146/annurev-earth-050212-124012
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
Detrital zircon geochronology is rapidly developing into an essential tool in Earth science research because of the widespread occurrence of zircon in sedimentary systems; the wide range of information that can be extracted from zircon crystals; the ability to determine ages with reasonable precision, accuracy, and efficiency; and the wide range of new ideas about how to use detrital zircon geochronologic information. The U-Pb system is particularly powerful because three chronometers are available (U-238 -> Pb-206, U-235 -> Pb-207, and Th-232 -> Pb-208), but challenges arise because of complexities from inheritance and Pb loss. Ages can be used to constrain the age of deposition of the host sediment, reconstruct provenance, characterize a sedimentary unit, and characterize many different aspects of source regions. Detrital zircon geochronology has an exciting future given the growth history recorded in individual crystals; the variety of detrital minerals that can provide complementary information; and the large number of geochemical, isotopic, and chronologic systems that can be applied to these minerals.
引用
收藏
页码:127 / 149
页数:23
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