Th-Pb and U-Pb dating of ore-stage calcite and paleozoic fluid flow

被引：57
|
作者：
Brannon, JC
Cole, SC
Podosek, FA
Ragan, VM
Coveney, RM
Wallace, MW
Bradley, AJ
机构：
[1] WASHINGTON UNIV,MCDONNELL CTR SPACE SCI,ST LOUIS,MO 63130
[2] UNIV MISSOURI,DEPT GEOSCI,KANSAS CITY,MO 64110
[3] UNIV MELBOURNE,SCH EARTH SCI,PARKVILLE,VIC 3052,AUSTRALIA
来源：
SCIENCE | 1996年 / 271卷 / 5248期
关键词：
D O I：
10.1126/science.271.5248.491
中图分类号：
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
Thorium-232-lead-208 and uranium-238-lead-206 radiometric ages for ore-stage calcite show that Mississippi Valley-type (MVT) ore deposits can form in distinct tectonic settings. An age of 251 +/- 11 million years for the Jumbo Mine in Kansas, United States, is in agreement with other ages for MVT deposits in the midcontinent of North America. The similarity of ages of these deposits supports the concept that they formed in response to fluid flow during the late Paleozoic Alleghenian-Ouachita orogeny. An age of 351 +/- 15 million years for Twelve Mile Bore and Bloodwood-Kapok deposits in Australia indicates that these MVT ores were deposited in a rifting environment.
引用
收藏
页码：491 / 493
页数：3
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