2024 06 v.54 1004-1012
鄂尔多斯盆地西部中奥陶统克里摩里组沉积特征研究
基金项目(Foundation):
甘肃省高校教师创新基金(2025B-8);
兰州城市学院艾黎学科建设计划项目
邮箱(Email):
fengjuanping@163.com;
DOI:
10.16152/j.cnki.xdxbzr.2024-06-006
中文作者单位:
兰州城市学院培黎石油工程学院;西安科技大学地质与环境学院;西北大学地质学系;
摘要(Abstract):
鄂尔多斯盆地西部下古生界奥陶系因油气勘探潜力大一直备受关注。其中，中奥陶统克里摩里组发育的碳酸盐岩有望成为下一个勘探目标层，因此，对其沉积特征进行深入剖析可以为西缘奥陶系天然气勘探提供地质依据。通过野外剖面考察、岩心观察和薄片鉴定等手段，研究了克里摩里组的岩石学特征、沉积相类型及其空间展布规律。结果表明，克里摩里组岩性主要为薄层泥晶灰岩、砾屑、砂屑、粉屑灰岩、(含)生物碎屑灰岩及黑色页岩。泥晶结构、粒屑结构发育可见薄层状、纹层状、瘤状、角砾状构造和滑塌及鲍马层序。沉积相类型以台地前缘斜坡和深水斜坡海槽发育为主要特征，表现为沿南北向呈狭窄的条带状展布，在自东向西方向上，紧邻鄂尔多斯本部的开阔海台地发育台地前缘斜坡相带，向西迅速相变为深水斜坡海槽相，海水具有逐渐加深的趋势。
关键词(KeyWords):
鄂尔多斯盆地西部;奥陶系;克里摩里组;沉积特征
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参考文献
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[4] 吴东旭，周进高，吴兴宁，等.鄂尔多斯盆地西缘早中奥陶世岩相古地理研究[J].高校地质学报，2018,24(5):747-760.WU D X,ZHOU J G,WU X N,et al.Lithofacies and paleogeography of the Early-Middle Ordovician in the western Ordos Basin[J].Geological Journal of Chinese Universities,2018,24(5):747-760.
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[9] 欧阳征健，冯娟萍，龚慧山，等.鄂尔多斯盆地西缘横山堡地区构造特征与油气勘探目标优选[J].地质科学，2021,56(1):19-27.OUYANG Z J,FENG J P,GONG H S,et al.Structural characteristics and oil and gas exploration target optimization of Hengshanbu area in the north of western margin of Ordos Basin[J].Chinese Journal of Geology,2021,56(1):19-27.
[10] 付锁堂，付金华，席胜利，等.鄂尔多斯盆地奥陶系海相页岩气地质特征及勘探前景[J].中国石油勘探，2021,26(2):33-44.FU S T,FU J H,XI S L,et al.Geological characteristics of Ordovician marine shale gas in the Ordos Basin and its prospects[J].China Petroleum Exploration,2021,26(2):33-44.
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[12] 党犇.鄂尔多斯盆地构造沉积演化与下古生界天然气聚集关系研究[D].西安：西北大学，2003.
[13] 邵东波，包洪平，魏柳斌，等.鄂尔多斯地区奥陶纪构造古地理演化与沉积充填特征[J].古地理学报，2019,21(4):537-556.SHAO D B,BAO H P,WEI L B,et al.Tectonic palaeogeography evolution and sedimentary filling characteristics of the Ordovician in the Ordos Area[J].Journal of Palaeogeoeraphy,2019,21(4):537-556.
[14] 张永生，邢恩袁，王卓卓，等.鄂尔多斯盆地奥陶纪马家沟期岩相古地理演化与成钾意义[J].地质学报，2015,89(11):1921-1935.ZHANG Y S,XING E Y,WANG Z Z,et al.Evolution of lithofacies paleogeography in the Ordos Basin and its implication of potash formation[J].Acta Geologica Sinica,2015,89(11):1921-1935.
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[17] 郭彦如，赵振宇，徐旺林，等.鄂尔多斯盆地奥陶系层序地层格架[J].沉积学报，2014,32(1):44-60.GUO Y R,ZHAO Z Y,XU W L,et al.Sequence stratigraphy of the Ordovician system in the Ordos Basin[J].Acta Sedimentologica Sinica,2014,32(1):44-60.
[18] 梅志超，李文厚.陕西富平中-上奥陶统深水碳酸盐重力流沉积模式[J].沉积学报，1986,4(1):34-42.MEI Z C,LI W H.Depositional model of deep water carbonate gravity flows in the middle-upper Ordovician series in Fuping,Shanxi Province[J].Acta Sedimentologica Sinica,1986,4(1):34-42.
[19] 冯增昭，鲍志东.鄂尔多斯奥陶纪马家沟期岩相古地理[J].沉积学报，1999,17(1):1-8.FENG Z Z,BAO Z D.Lithofacies paleogeography of Majiagou age of Ordovician in Ordos Basin[J].Acta Sedimentologica Sinica,1999,17(1):1-8.
[20] 付金华，吴兴宁，孙六一，等.鄂尔多斯盆地马家沟组中组合岩相古地理新认识及油气勘探意义[J].天然气工业，2017,37(3):9-16.FU J H,WU X N,SUN L Y,et al.New understandings of the lithofacies paleogeography of the middle assemblage of Majiagou Fm in the Ordos Basin and its exploration significance[J].Natural Gas Industry,2017,37(3):9-16.
[21] 付金华，郑聪斌.鄂尔多斯盆地奥陶纪华北海和祁连海演变及岩相古地理特征[J].古地理学报，2001,3(4):25-34.FU J H,ZHENG C B.Evolution between North China sea and Qilian sea of the Ordovician and the characteristics of lithofacies palaeogeography in Ordos Basin [J].Journal of Palaeogeography,2001,3(4):25-34.
[22] 刘溪.鄂尔多斯西南缘岐山地区奥陶纪岩相古地理研究[D].西安：西北大学，2010.
[23] 吴兴宁，孙六一，于洲，等.鄂尔多斯盆地西部奥陶纪岩相古地理特征[J].岩性油气藏，2015,27(6):87-96.WU X N,SUN L Y,YU Z,et al.Lithofacies paleogeography of Ordovician in western Ordos Basin[J].Lithologic Reservoirs,2015,27(6):87-96.
[24] 李文厚，张倩，陈强，等.鄂尔多斯盆地及周缘地区早古生代沉积演化[J].西北大学学报(自然科学版),2020,50(3):456-479.LI W H,ZHANG Q,CHEN Q,et al.Sedimentary evolution of Early Paleozoic in Ordos Basin and its adjacent areas[J].Journal of Northwest University (Natural Science Edition),2020,50(3):456-479.
基本信息:
DOI：10.16152/j.cnki.xdxbzr.2024-06-006
中图分类号:P618.13
引用信息:
[1]欧阳征健,冯娟萍,姚韦卓等.鄂尔多斯盆地西部中奥陶统克里摩里组沉积特征研究[J].西北大学学报(自然科学版),2024,54(06):1004-1012.DOI:10.16152/j.cnki.xdxbzr.2024-06-006.
基金信息:
甘肃省高校教师创新基金(2025B-8); 兰州城市学院艾黎学科建设计划项目