鄂尔多斯盆地南部延长组长6时期物源状况分析
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摘要
为查明鄂尔多斯盆地南部延长组沉积体系的分布格局等问题,通过常规矿物成分分析、重矿物特征、岩屑特征、地球化学特征和地震剖面等研究方法,对鄂尔多斯盆地南部的物源及源区母岩性质等进行了系统研究。结果表明,盆地南部地区主要受到3大物源主要控制,可进一步再划分出5个次级物源,即东北、北部、西部、西南、南部。古物源与沉积体系具有良好的空间配置关系,决定了盆地长6时期的沉积体系分布格局。沉积物源的研究将有助于油气勘探的部署。
For determining the distribution pattern of the depositional system of Yanchang Formation in the south of Ordos basin , the authors did a systematic research on the provenance and the characteristics of the mother rock by many methods such as the analysis of rocks and minerals , heavy mineral analysis, rock fragment character, geochemical and seismic profile anlysis etc. . The results indicate that there is mainly controlled by three great sediment source regions in the south of Ordos basin, and more detailed divide five sub-sources, which are from northeast, north, west, southwest and south. Provenance have favorable spatial combination with depositional system and determine the depositional system pattern of Chang6 oil-bearing. Provenance is useful to reasonable deployment of oil-gas exploration.
For determining the distribution pattern of the depositional system of Yanchang Formation in the south of Ordos basin , the authors did a systematic research on the provenance and the characteristics of the mother rock by many methods such as the analysis of rocks and minerals , heavy mineral analysis, rock fragment character, geochemical and seismic profile anlysis etc. . The results indicate that there is mainly controlled by three great sediment source regions in the south of Ordos basin, and more detailed divide five sub-sources, which are from northeast, north, west, southwest and south. Provenance have favorable spatial combination with depositional system and determine the depositional system pattern of Chang6 oil-bearing. Provenance is useful to reasonable deployment of oil-gas exploration.
引文
1何自新.鄂尔多斯盆地演化与油气[M].北京:石油工业出版社,2003[He Zixin.The Evolution and Oil-gas of Ordos Basin[M].Bei-jing:Petroleum Industry Press,2003]
2赵俊兴,陈洪德,向芳.鄂尔多斯盆地中部延安地区中侏罗统延安组高分辨率层序地层研究[J].沉积学报,2003,21(2):307-312[Zhao Junxing,Chen Hongde,Xiang Fang.The high-resolution se-quence stratigraphy feature of Yanan Formation in Yanan Area,Ordos Basin[J].Acta Sedimentologica Sinica,2003,21(2):307-312]
3郭艳琴,李文厚,胡友洲,等.陇东地区上三叠统延长组早中期物源分析与沉积体系[J].煤田地质与勘探.2006,34(1):1-4[Guo Yanqin,Li Wenhou,Hu Youzhou.Source analysis and depositional systems of Upper Triassic early and Mid-term Yanchang Formation in Longdong area[J],Coal Geology&Exploration,2006.34(1):1-4]
4王世虎,焦养泉,吴立群,等.鄂尔多斯盆地西北部延长组中下部古物源与沉积体空间配置[J].地球科学—中国地质大学学报,2007,32(2):201-208[Wang Shihu,Jiao Yangquan,Wu Liqun,et al.Spatial combination of paleoprovenance and depositional lobe of Mid-Lower Yanchang Formation in the northwest of Ordos Basin[J].Earth Science-Journal of China University of Geosciences.2007,32(2):201-208]
5Weltje G J,Eynatten H V.Quantitative provenance analysis of sedi-ments:Review and outlook[J].Sedimentary Geology,2004,171:1-11
6Vezzoli G,Garzanti E,Monguzzi S.Erosion in the western Alps(Dora Baltea basin)quantifying sediment provenance[J].Sedimentary Geol-ogy,2004,171:227-246
7赵红格,刘池洋.物源分析方法及研究进展[J].沉积学报,2003,21(3):409-415[Zhao Hongge,Liu Chiyang.Approaches and pros-pects of provenance analysis[J].Acta Sedimentologica Sinica,2003,21(3):409-415]
8宋凯,吕剑文,杜金良,等.鄂尔多斯盆地中部上三叠统延长组物源方向分析与三角洲沉积体系[J].古地理学报,2002,4(3):59-65[Song Kai,Lu Jianwen,Du Jinliang,et al.Source direction a-nalysis and delta depositional systems of Yangchang Formation of the upper Triassic in the central Ordos Basin[J].Journal of Palaeogeogra-phy,2002,4(3):59-65]
2赵俊兴,陈洪德,向芳.鄂尔多斯盆地中部延安地区中侏罗统延安组高分辨率层序地层研究[J].沉积学报,2003,21(2):307-312[Zhao Junxing,Chen Hongde,Xiang Fang.The high-resolution se-quence stratigraphy feature of Yanan Formation in Yanan Area,Ordos Basin[J].Acta Sedimentologica Sinica,2003,21(2):307-312]
3郭艳琴,李文厚,胡友洲,等.陇东地区上三叠统延长组早中期物源分析与沉积体系[J].煤田地质与勘探.2006,34(1):1-4[Guo Yanqin,Li Wenhou,Hu Youzhou.Source analysis and depositional systems of Upper Triassic early and Mid-term Yanchang Formation in Longdong area[J],Coal Geology&Exploration,2006.34(1):1-4]
4王世虎,焦养泉,吴立群,等.鄂尔多斯盆地西北部延长组中下部古物源与沉积体空间配置[J].地球科学—中国地质大学学报,2007,32(2):201-208[Wang Shihu,Jiao Yangquan,Wu Liqun,et al.Spatial combination of paleoprovenance and depositional lobe of Mid-Lower Yanchang Formation in the northwest of Ordos Basin[J].Earth Science-Journal of China University of Geosciences.2007,32(2):201-208]
5Weltje G J,Eynatten H V.Quantitative provenance analysis of sedi-ments:Review and outlook[J].Sedimentary Geology,2004,171:1-11
6Vezzoli G,Garzanti E,Monguzzi S.Erosion in the western Alps(Dora Baltea basin)quantifying sediment provenance[J].Sedimentary Geol-ogy,2004,171:227-246
7赵红格,刘池洋.物源分析方法及研究进展[J].沉积学报,2003,21(3):409-415[Zhao Hongge,Liu Chiyang.Approaches and pros-pects of provenance analysis[J].Acta Sedimentologica Sinica,2003,21(3):409-415]
8宋凯,吕剑文,杜金良,等.鄂尔多斯盆地中部上三叠统延长组物源方向分析与三角洲沉积体系[J].古地理学报,2002,4(3):59-65[Song Kai,Lu Jianwen,Du Jinliang,et al.Source direction a-nalysis and delta depositional systems of Yangchang Formation of the upper Triassic in the central Ordos Basin[J].Journal of Palaeogeogra-phy,2002,4(3):59-65]
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