Collaborative Research: Dating Sedimentary Sequences: In Situ U/Th-Pb Microprobe Dating of Early Diagenetic Monazite in Neoproterozoic Black Shales
Collaborative Research: Dating Sedimentary Sequences: In Situ U/Th-Pb Microprobe Dating of Early Diagenetic Monazite in Neoproterozoic Black Shales
批准号:
0643243
负责人:
Michael Williams
金额:
$0.0万
依托单位国家:
美国
项目类别:
Standard Grant
财政年份:
2007
资助国家:
美国
项目状态:
已结题
起止时间:
2007-07-15 至 2009-06-30
中文摘要
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英文摘要
This study will provide new technologies to directly date sedimentary sequences. Proof of the concept will come from dating Neoproterozoic black shales in Grand Canyon via in situ U/Th-Pb microprobe dating of authigenic grains that were precipitated by microbial processes near the time of lithification. New technologies will minimize electron beam diameter, count rate, background regression, conductive coating, interference correction, and error estimation. Geologic applications include precise dating of Neoproterozoic C-isotope excursions.
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