| Comparative studies on carbon origin of dawsonite between Hailaer Basin in China and Bowen-Gunnedah-Sydney basin system in Australia |
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| 作者姓名： | Yuqiao GAO Li LIU Qi＇an MENG Yan XU Xiyu QU Xianmei JIN |
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| 作者单位： | Yuqiao GAO1，Li LIU1，Qi'an MENG2，Yan XU1，Xiyu QU1 and Xianmei JIN31. College of Earth Sciences，Jilin University，Changchun 130061，China2. Exploration and Development Research Institute of Daqing Oilfield Ltd Co.，Daqing 163712，Heilongjiang，China3. Exploration and Development Research Institute of Northwest Branch of SINOPEC，Urumchi 830011，China |
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| 基金项目： | Project of NSFC (No.40372060) |
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| 摘 要： | Dawsonite, NaAlCO3(OH)2, is widespread as a cement, replacement and cavity filling in Hailaer Basin in China and Bowen-Gunnedah-Sydney (BGS) basin system in Australia. The origin of dawsonite is emphatically contrasted and analyzed through stable isotopic composition. Dawsonite δ13C values ranging from -4.0×10-3 to 4.1×10-3 are remarkably consistent through the BGS basin system. The calculated δ13C values of CO2 gas in isotopic equilibrium with dawsonite range from -11.3×10-3 to -4.6×10-3. These values indicate carbon of dawsonite came from inorganic CO2 gas accompanied by magmatic activity. In Hailaer Basin, the Dawsonite δ13C values ranging from -4.64×10-3 to 2.12×10-3 are also consistent. The calculated δ13C values of CO2 gas in isotopic equilibrium with dawsonite range from -11.82×10-3 to -5.11×10-3. According to the coincidence of dawsonite-bearing well and CO2 gas well with mantle source,lying along deep fracture within or adjacent to Yanshanian granite,it is concluded that CO2 gas forming dawsonite is derived from mantle related to magmatic process during the Yanshanian. A little biologic origin carbon owing to petroleum charging intervened when dawsonite formed.
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| 关 键 词： | 片钠铝石 碳元素 同位素 盆地 |
Comparative studies on carbon origin of dawsonite between Hailaer Basin in China and Bowen-Gunnedah-Sydney basin system in Australia |
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| Yuqiao GAO,Li LIU,Qi''''an MENG,Yan XU,Xiyu QU,Xianmei JIN,.Comparative studies on carbon origin of dawsonite between Hailaer Basin in China and Bowen-Gunnedah-Sydney basin system in Australia[J].Journal of Geoscientific Research in Northeast Asia,2007,10(2):148-155. |
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| Authors: | Yuqiao GAO Li LIU Qi'an MENG Yan XU Xiyu QU Xianmei JIN |
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| Institution: | [1]College of Earth Sciences, Jilin University, Changchun 130061, China [2]Exploration and Development Research Institute of Daqing Oilfield Ltd Co. , Daqing 163712, Heilon~iang, China [3]Exploration and Development Research Institute of Northwest Branch of SINOPEC, Urumchi 830011, China |
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| Abstract: | |
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| Keywords: | dawsonite isotope composition source for carbon Hailaer Basin BGS basin system |
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