Wave Structre in Paleozoic Era of Ordos Basin and Its Significance in Paleogeography
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摘要: 波动是地质作用的基本形式之一,地壳的波状运动和变形是客观存在的。用波动论对鄂尔多斯盆地早古生代构造、沉积与古地理进行了探讨,将鄂尔多斯及邻区早古生代波状构造单元划分为 :阴山波谷带、伊盟波峰带、中部波谷带、渭北波峰带、北秦岭波谷带、阿拉善波峰带、贺兰波谷带、中央隆起波峰带、东部波谷带、苛兰波峰带。东部波谷带与中部波谷带的复合形成了东部波谷复合区。早奥陶世马家沟期东部盐洼区就是该波谷复合区的产物。在该复合区还形成鄂尔多斯盆地最为重要的下古生界烃源中心。中央古隆起波峰带与中部波谷带相复合形成定边波峰波谷复合区,使得中央古隆起在定边一带呈现出鞍状形态,从而合理解释了中央古隆起向北延伸至定边一带“断掉了”这一现象。Abstract: Undulation is one of the fundamental models of the geological effect,the undulation motion and variation in shape of earth crust is an geologic facts. In this paper,the undulation theory is applied to discuss the structure,deposit and paleogeography pattern of Paleozoic of Ordos Basin.The units of wave structure of Ordos and its neigbhouring areas are divided as:Yinshan wave trough,Yimeng wave crest,Central wave trough,Weibei wave crest,Qingling wave crest,Alashan wave crest,Helan wave trough,Central doming wave crest,Eastern wave trough and Kelan wave crest structure belt.The compound of Central wave trough and Eastern wave trough formed eastern salt depression.This area has also formed the big center of hydrocabon source that are the most important in under Paleozoic group of Ordos Basin.Central doming wave crest structure belt and Central wave trough structure belt were formed Dinbian compound areas,which make the central doming appear saddle in Dinbian.It also reasonably explains the phenomenon that Central doming is suspended in Dinbian area.
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Key words:
- wave structure /
- Paleogeography /
- Early Paleozoic /
- Ordos Basin /
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[1] Zhang Y W, Liu G C and Jin Z J. Application of sedimentary wave pro-cess in quantitative study of unconformity - a case study of Tarim basin[J] . Petroleum Science, 1998,1 (1) :7~11 [2] 刘国臣,金之均,李京昌,沉积盆地沉积-剥蚀过程定量研究的一种新方法——盆地波动分析应用之一[J] .1995,沉积学报,13(3):23~31 [3] 程裕琪.中国区域地质概论[M] .北京:地质出版社,1996,85~88 [4] 戴金星,王庭斌,宋岩等.中国大中型气田形成条件-分布规律[M] .北京:地质出版社,1997.81~99 [5] 长庆石油地质志编写组.中国石油地质志卷十二(长庆油田)[M] .北京:石油工业出版社,1992.23~39 [6] 杨俊杰,裴锡古.中国天然气地质学卷4(鄂尔多斯盆地)[M] .北京:石油工业出版社,1996,18~42 [7] 冯增昭,鲍志东,张永生,谭健.鄂尔多斯奥陶纪地层岩石岩相古地理[M] .北京:地质出版社,1998,80~132 [8] 方国庆,王多云,林锡祥等.陕甘宁盆地中部东西向构造带的确定及其天然气地质意义[J] .石油与天然气地质,1999,23(3):195~198 [9] 郭英海,刘涣杰.鄂尔多斯地区晚古生代沉积体系及古地理演化[J] .沉积学报,1998,16(3):44~51 [10] 周鼎武,赵重远,李银德等.鄂尔多斯盆地南缘地质特征及其与秦岭造山带的关系[M] 北京:地质出版社,1994,113~145 [11] 方国庆,李育慈.西秦岭海西-印支期裂陷活动及其与古特提斯的关系[J] .沉积学报,1994,12(3):76~81 [12] 刘群,杜之岳,陈郁华.陕北奥陶系和塔里木石炭系钾盐找矿前景[M] .北京:原子能出版社,1997.34~47 [13] 张福礼.鄂尔多斯盆地天然气地质[M] .北京:地质出版社,1994.47~59 [14] 刘德良,沈修志,陈江峰,叶尚夫.地球与类地行星构造地质学[M] .合肥:中国科学技术大学出版社,1997.231~300 -

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