Spatial Combination of Paleoprovenance and Depositional Lobe of Mid-Lower Yanchang Formation in the Northwest of Ordos Basin
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摘要: 为了查明鄂尔多斯盆地西北部延长组沉积体系的分布格局等问题, 以上三叠统延长组中下部为目标, 通过常规矿物成分分析、重矿物特征研究、古水流测量、砂分散体系制图和古地貌恢复等方法, 对鄂尔多斯盆地西北部的物源及源区母岩性质等进行了系统研究.结果表明, 研究区主要受到4个物源的影响, 古物源与沉积体系具有良好的空间配置关系: 西北部的汝箕沟朵体受阿拉善古陆物源区控制, 它对研究区影响最大; 石沟驿朵体的物源来自大罗山逆冲席隆起; 东部的鄂托克旗朵体和定边朵体则受到鄂尔多斯盆地东北部物源的控制.四大物源区的母岩性质具有差异, 其中西部的阿拉善古陆物源区和大罗山逆冲席物源区的母岩以变质岩为主, 还有一定量的花岗岩和沉积岩; 而鄂尔多斯盆地东北部物源则以花岗岩和变质岩为主.沉积物源的研究有助于油气勘探的部署.Abstract: For determining the distribution pattern of the depositional system of Yanchang Formation in the northwest of Ordos basin, the authors chose mid-lower Yanchang Formation and did a systematic research on the provenance and the characteristics of the mother rock by methods such as the analysis of rocks and minerals, heavy mineral analysis, paleocurrent survey, sand distribution system drawing and paleo-topogrphy reconstruction etc.. The results indicate that the study area is mainly affected by four sediment sources, which have favorable spatial combination with depositional system: Rujigou lobe which has the largest influence on the study area is controlled by the Alxa Ancient Land; Shigouyi lobe develops from the overthrust sheet of Daluo Mountain; Otog Qi lobe and Dingbian lobe are controlled by the sedimentary sources in the northeast of Ordos basin. The mother-rock properties of the four provenances are very different. The ones in the Alxa Ancient Land and in the overthrust sheet of Daluo Mountain mainly consist of metamorphic rocks, including some granite and sedimentary rocks. However, the ones in the northeast of Ordos basin are mianly made up of granite and metamorphic rocks. Provenance analysis is useful to reasonable deployment of oil and gas exploration.
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Key words:
- provenance analysis /
- Yanchang Formation /
- northwest of Ordos basin
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图 1 鄂尔多斯盆地西北部长6油层组砂分散体系
Fig. 1. Sand distributing system of the Chang 6 oilbed in the northwest of Ordos basin
图 2 鄂尔多斯盆地西北部延长组中下部实测古水流和砂体走向统计玫瑰花图
Fig. 2. Paleocurrents and sandbody strike statistic of mid-lower Yanchang Formation in the northwest of Ordos basin
图 3 汝箕沟露头区褶皱与延长组古水流关系
a.神水庙背斜西翼, 长10 -8油层组上部; b.神水庙背斜西翼, 长10 -8油层组上部; c.神水庙背斜东翼, 长8油层组; d.荒草滩向斜西翼, 长10 -8油层组上部
Fig. 3. Relationship of the folds and paleocurrents of Yanchang Formation in the Rujigou outcrop
图 4 研究区南部长6油层组重矿物聚类谱系(a, b)和平面展布图(c, d)
a.重矿物聚类谱系树; b.重矿物聚类平面分区; c.锆石百分含量(%); d.石榴石百分含量(%)
Fig. 4. Cluster lineage(a, b) and distribution map(c, d)of heavy minerals of Chang 6 oilbed in the south of study area
图 5 鄂尔多斯盆地西北部古地貌形态(a)及其与砂分散体系和古物源配置关系(b)(河西走廊区的古流资料据赵文智等, 2006)
Fig. 5. Paleo-topography and superposed relationship with sand distributing system(a) and paleoprovenance in the northwest of Ordos basin(b)
表 1 鄂尔多斯盆地西北部延长组中下部三角洲朵体发育规模统计
Table 1. Delta lobe scale statistic of mid-lower Yanchang Formation in the northwest of Ordos basin
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Bai, Y.L., Wang, X.M., Liu, H.Q., et al., 2006. Determination of the borderline of the western Ordos basin and its geodynamics background. Acta Geologica Sinica, 80 (6): 792-813(in Chinese with English abstract). https://www.researchgate.net/publication/320040339_baopodezhenjieshidehuabeixibugaofenbianjidisudujiegou Compilation Group of Petroleum Geology of Changging Oilfield, 1992. Petroleum geology of China, Vol. 12. Petroleum Industry Press, Beijing(in Chinese). Emmel, B., Geiger, M., Jacobs, J., 2006. Detrital apatite fissiontrack ages in Middle Jurassic strata at the rifted margin of W Madagascar— Indicator for a protracted resedimentation history. Sedimentary Geology, 186: 27-38. doi: 10.1016/j.sedgeo.2005.09.022 Guo, S.B., Sun, S.H., 2006. Rebuilding paleogeomorphology of pre-Jurassic and oil-gas accumulation regulation in Zhoujiawan area. Earth Science— Journal o f China University o f Geosciences, 31(3): 372-377. Guo, Y.Q., Li, W.H., Hu, Y.Z., et al., 2006. Source analysis and depositional systems of Upper Triassic early and mid-term Yanchang Formationin Longdong area. CoalGeology & Exploration, 34(1): 1-4(in Chinese with English abstract). He, Z.X., 2003. Evolution and oil-gas reservoirs in Ordos basin. Petroleum Industry Press, Beijing(in Chinese). He, Z. H., Liu, Z. J., Zhang, F., 2001. Latest progress of heavy mineral research in the basin analysis. Geological Science and Technology In formation, 20(4): 29-32 (in Chinese with English abstract). Jiao, Y.Q., Li, Z., Zhou, H.M., 1998. The integated study of sediment sources in sedimentary basin: An example from the Eo cene Nanpu rift subbasin. Sedimentary Facies and Palaeogeography, 18(5): 16-20(in Chinese with English abstract). Jiao, Y.Q., Zhu, P.M., Lei, X.R., et al., 2006.3D modeling and visualization of geosciences spatial information: Application to the Ordos basin and other fields. Science Press, Beijing(in Chinese). Liu, B. J., Zeng, Y.F., 1985. Lithofacies and paleogeography: Principle and approach. Geological Publishing House, Beijing(in Chinese). Liu, C.Y., Zhao, H.G., Wang, F., et al., 2005. Attributes of the Mesozoic structure on the west margin of Ordos basin. Acta Geologica Sinica, 79(6): 737-747(in Chinese with English abstract). https://en.cnki.com.cn/Article_en/CJFDTOTAL-DZXE200506006.htm Su, C.Q., Yang, X.K., Liu, J.Q., et al., 2004. A study of foreland basins in the light of Triassic-Jurassic strata of the Helan Mountain. Acta Petrologica et Mineralogica, 23(4): 318-326(in Chinese with English abstract). Vezzoli, G., Garzanti, E., Monguzzi, S., 2004. Erosion in the western Alps(Dora Baltea basin) quantifying sediment provenance. Sedimentary Geology, 171: 227-246. https://pubs.geoscienceworld.org/gsa/geology/article/31/7/601/188336/episodic-exhumation-in-the-western-alps Wanas, H.A., Abdel-Maguid, N.M., 2006. Petrography and geochemistry of the Cambro-Ordovician wajid sandstone, southwest Saudi Arabia: Implications for provenance and tectonic setting. Journal o f Asian Earth Sciences, 27(4): 416-429. doi: 10.1016/j.jseaes.2005.05.002 Weltje, G. J., Eynatten, H. V., 2004. Quantitative provenance analysis of sediments: Review and outlook. Sedimentary Geology, 171: 1-11. doi: 10.1016/j.sedgeo.2004.05.007 Yang, J.J., 2002. Tectonic evolution and oil-gas reservoirs distribution in Ordos basin. Petroleum Industry Press, Beijing(in Chinese). Zhao, H.G., Liu, C.Y., 2003. Approaches and prospects of provenance analysis. Acta Sedimentologica Sinica, 21 (3): 409-415(in Chinese with English abstract). https://en.cnki.com.cn/Article_en/CJFDTOTAL-CJXB200303006.htm Zhao, W.Z., Wang, X.M., Guo, Y.R., et al., 2006. Restorational and tectonic reworking of the Late Triassic basin in western Ordos basin. Petroleum Exploration and Development, 33(1): 6-13(in Chinese with English abstract). https://www.researchgate.net/publication/249500091_Tectonic_Evolution_of_the_Tianhuan_Depression_and_the_Western_Margin_of_the_Late_Triassic_Ordos Zhao, Z.Y., Liu, C.Y., 1992. Basins in the residual craton and their petroleum prospect— Example with Ordos basin and Sichuan basin. In: China Geology Academy, ed., Dissertation anthology at the academic communion conference in "seven-five" geology technological important fruits. Science and Technology Publishing Company, Beijing, 610-613. Zhou, Z.Y., Liao, Z.T., Yang, F.L., et al., 2001. Fissiontrack analysis and its application in the study of sedimentary basins. Petroleum Geology and Experiment, 23 (3): 332-338(in Chinese with English abstract). 白云来, 王新民, 刘化清, 等, 2006. 鄂尔多斯盆地西部边界的确定及其地球动力学背景. 地质学报, 80(6): 792-813. https://www.cnki.com.cn/Article/CJFDTOTAL-DZXE200606003.htm 长庆油田石油地质志编写组, 1992. 中国石油地质志(卷十二), 长庆油田. 北京: 石油工业出版社. 郭少斌, 孙绍寒, 2006. 周家湾地区前侏罗纪古地貌恢复及油气富集规律. 地球科学——中国地质大学学报, 31(3): 372-377. https://www.cnki.com.cn/Article/CJFDTOTAL-DQKX200603013.htm 郭艳琴, 李文厚, 胡友洲, 等, 2006. 陇东地区上三叠统延长组早中期物源分析与沉积体系. 煤田地质与勘探, 34(1): 1-4. doi: 10.3969/j.issn.1001-1986.2006.01.001 何钟铧, 刘招君, 张峰, 2001. 重矿物在盆地分析中的应用研究进展. 地质科技情报, 20(4): 29-32. doi: 10.3969/j.issn.1000-7849.2001.04.006 何自新, 2003. 鄂尔多斯盆地演化与油气. 北京: 石油工业出版社. 焦养泉, 李珍, 周海民, 1998. 沉积盆地物质来源综合研究一以南堡老第三纪亚断陷盆地为例. 岩相古地理, 18(5): 16-20. https://www.cnki.com.cn/Article/CJFDTOTAL-TTSD199805005.htm 焦养泉, 朱培民, 雷新荣, 等, 2006. 地学空间信息三维建模与可视化-鄂尔多斯盆地及相关领域的实践. 北京: 科学出版社, 171-188. 刘宝, 曾允孚, 1985. 岩相古地理基础和工作方法. 北京: 地质出版社. 刘池洋, 赵红格, 王峰, 等, 2005. 鄂尔多斯盆地西缘(部)中生代构造属性. 地质学报, 79(6): 737-747. doi: 10.3321/j.issn:0001-5717.2005.06.003 苏春乾, 杨兴科, 刘继庆, 等, 2004. 从贺兰山区的三叠侏罗系论国内前陆盆地的研究. 岩石矿物学杂志, 23(4): 318-326. doi: 10.3969/j.issn.1000-6524.2004.04.010 杨俊杰, 2002. 鄂尔多斯盆地构造演化与油气分布规律. 北京: 石油工业出版社. 赵红格, 刘池洋, 2003. 物源分析方法及研究进展. 沉积学报, 21(3): 409-415. doi: 10.3969/j.issn.1000-0550.2003.03.007 赵文智, 王新民, 郭彦如, 等, 2006. 鄂尔多斯盆地西部晚三叠世原型盆地恢复及其改造演化. 石油勘探与开发, 33 (1): 6-13. doi: 10.3321/j.issn:1000-0747.2006.01.002 赵重远, 刘池洋, 1992. 残延克拉通内盆地及其含油气性——以鄂尔多斯盆地和四川盆地为例. 见: 中国地质学会编"七五"地质科技重要成果学术交流会议论文选集. 北京: 科学技术出版社, 610-613. 周祖翼, 廖宗廷, 杨凤丽, 等, 2001. 裂变径迹分析及其在沉积盆地研究中的应用. 石油实验地质, 23(3): 332-338. doi: 10.3969/j.issn.1001-6112.2001.03.015 -
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