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The AAPG/Datapages Combined Publications Database
AAPG Bulletin
Abstract
AAPG Bulletin, V.
DOI: 10.1306/07062322106
Direct radiometric dating of bitumen using Sm-Nd isotopes
Mao-Wen Yuan,1 Lin Li,2 Sheng-Rong Li,3 M. Santosh,4 Cheng-Lu Li,5 Masroor Alam,6 Zeng-Qian Hou,7 and Ming Li8
1State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences, Beijing, China; School of Earth Science and Resources, China University of Geosciences, Beijing, China; 851497705@qq.com
2State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences, Beijing, China; Institute of Earth Sciences, China University of Geosciences, Beijing, China; clark.li@cugb.edu.cn
3State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences, Beijing, China; School of Earth Science and Resources, China University of Geosciences, Beijing, China; 1995010290@cugb.edu.cn
4School of Earth Science and Resources, China University of Geosciences, Beijing, China; Department of Earth Sciences, University of Adelaide, Adelaide, South Australia, Australia; santosh@cugb.edu.cn
5Heilongjiang Institute of Geological Survey, Harbin, Heilongjiang, China; 13022124@qq.com
6Department of Earth Sciences, Karakoram International University, Gilgit, Pakistan; masroor.alam@kiu.edu.pk
7Institute of Geology, Chinese Academy of Geological Sciences, Beijing, China; houzengqian@126.com
8State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences, Beijing, China; School of Earth Science and Resources, China University of Geosciences, Beijing, China; 18607668382@qq.com
ABSTRACT
The Sm–Nd geochronology has great potential to directly constrain the age of hydrocarbon generation, migration, and charging; however, this technique has been rarely applied and poorly understood in the context of timing of petroleum system formation and evolution. In this contribution, we carried out a comprehensive study of the Sm–Nd isotope, mineralogical characteristics, and Raman spectroscopy of bitumen from the Erdaokan Ag–Pb–Zn hydrothermal
deposit located in the arc basin of the northeastern Great Xing’an Range, northeastern China. Bitumen in the orebodies of the Erdaokan Ag–Pb–Zn deposit was formed coevally with the Ag–Pb–Zn mineralization and generally coexisted with galena, sphalerite, pyrargyrite, argentite, and pyrite mainly in the quartz veins. The Sm–Nd dating of the bitumen samples yielded an isochron age of 235.50 ± 2.18 Ma (uncertainty given as two standard deviations of the mean,
hydrothermal
metal deposits.
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