Pb, Sr isotopes in organic matter of Lower Tertiary hydrocarbon source rocks in Liaohe Fault Depression |
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| Authors: | Jinglian Zhang Bingquan Zhu Yixian Cheng Xianglin Tu Zhengling Chao Chengjun Zhang Qianhua Xiao Jingyou Li Mingzhi Piao |
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| Affiliation: | ZHANG Jinglian, ZHU Bingquan, CHENG Yixian, TU Xianglin, CHAD Zhengling, ZHANG Chengjun, XIAO Qianhua3, LI Jingyou and PIAO Mingzhi Northwest Institute of Geology , CNPC, Lanzhou 730020, China; Guangzhou Institute of Geochimestry, Chinese Academy of Sciences , Guangzhou 510640, China; Liaohe Petroleum Exploration Bureau , Panjin 124010, China |
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| Abstract: | The Pb, Sr isotopic compositions in organic matters (kerogen and soluble organic matter) of Lower Tertiary hydrocarbon source rock in Liaohe Fault Depression is first reported. There is a great variable rang of Pb isotopic compositions in kerogen, 206Pb/204Pb = 17.488-18.656, 207Pb/204Pb= 15.388-15.692, 208Pb/204Pb = 37.656-37.484. And soluble organic matters have a very stable Pb isotopic composition, that is 206Pb/204Pb = 17.424-17.601, 207pb/204pb= 15.376-15.448, 208Pb/204Pb = 37.620-37.870. Sr isotopic composition varies in the range of 0.747 59-0.716 79 in kerogen and of 0.709 67-0.747 59 in soluble organic matters that have a great range. It is shown that mantle fluid can influence organic matters and make them form hydrothermal hydrocarbon in the geoglogic environment of rift basin. |
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| Keywords: | kerogen soluble organic matter Pb Sr isotope hydrothermal hydrocarbon Liaohe Fault Depression. |
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