鄂尔多斯盆地南部延长组长6时期物源状况分析

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。

Sediment Provenance Analysis of the Chang 6 Oil-bearing of Yanchang Formation in the South of Ordos Basin

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.