塔里木盆地阿满地区断裂构造分析
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摘要
通过精细地震资料解释,认为塔里木盆地阿满地区主要发育二叠纪的正断层,构造样式以"堑垒构造"为主;可能发育寒武纪—早奥陶世伸展构造和中晚奥陶世挤压构造,但因后期构造破坏,这两期断裂构造很难在地震剖面上识别出来。研究区断裂构造在白垩纪最终定型。寒武纪伸展构造与罗迪尼亚超大陆的裂解有关;中晚奥陶世的挤压构造状态成因为昆仑加里东运动期(—早海西运动期)的碰撞造山作用;早二叠世伸展构造与受大火成岩省影响的地幔柱活动产生的岩浆活动有关;白垩纪,研究区断裂构造不发育,地层稳定沉积,为构造定型期。在此基础上,总结了阿满地区的构造演化特征和油气勘探前景。
The fine seismic data interpretation shows that the Permian normal fault is mainly developed in Aman area in Tarim basin,and its tectonic style is dominated by "graben and horst"; the Cambrian-Early Ordovician stretching structure and the Middle-Late Ordovician compressional structure may also exist,but unable to be recognized on the seismic profiles due to late stage destruction,all of which finally came to being a stabilized state in Cretaceous in the study area. It is suggested that the Cambrian stretching structure is related with the cracking of Rodinia supercontinent; the Middle-Late Ordovician compression structure is shaped due to the Caledonian-Early Hercynian collision orogenesis of the Kunlun mountains; Early Permian stretching structure is a product of the volcanic activities caused by mantle plume movements in the large igneous province. Contrastively,in the Cretaceous,the faults stop growing and the strata deposit stably into almost unchanged sizes in the study area. Finally,the structural evolution characteristics and the oil exploration prospect in Aman area are discussed.
The fine seismic data interpretation shows that the Permian normal fault is mainly developed in Aman area in Tarim basin,and its tectonic style is dominated by "graben and horst"; the Cambrian-Early Ordovician stretching structure and the Middle-Late Ordovician compressional structure may also exist,but unable to be recognized on the seismic profiles due to late stage destruction,all of which finally came to being a stabilized state in Cretaceous in the study area. It is suggested that the Cambrian stretching structure is related with the cracking of Rodinia supercontinent; the Middle-Late Ordovician compression structure is shaped due to the Caledonian-Early Hercynian collision orogenesis of the Kunlun mountains; Early Permian stretching structure is a product of the volcanic activities caused by mantle plume movements in the large igneous province. Contrastively,in the Cretaceous,the faults stop growing and the strata deposit stably into almost unchanged sizes in the study area. Finally,the structural evolution characteristics and the oil exploration prospect in Aman area are discussed.
引文
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[14]张鼐,王招明,杨文静,等.塔中东部奥陶系烃包裹体特征及成藏意义[J].新疆石油地质,2011,32(3):267-271.
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[3]陈汉林,杨树锋,厉子龙,等.塔里木盆地二叠纪大火成岩省发育的时空特点[J].新疆石油地质,2009,30(2):179-182.
[4]Li Z L,Chen H L,Song B,et al.Temporal evolution of the Permian large igneous province in Tarim basin in northwest ern China[J].Journal of Asian Earth Sciences,2011,42(5):917-927.
[5]刘亚雷,胡秀芳,黄智斌,等.塔里木盆地塔北隆起西部火山岩40Ar-39Ar年代学和地球化学特征[J].岩石学报,2012,28(8):2423-2434.
[6]刘亚雷,黄智斌,吴根耀,等.塔北隆起西部中晚二叠世岩浆岩的分布和构造背景[J].新疆石油地质,2012,33(6):672-675.
[7]李曰俊,杨海军,赵岩,等.南天山区域大地构造与演化[J].大地构造与成矿学,2009,33(1):94-104.
[8]李曰俊,张洪安,钱一雄,等.关于南天山碰撞造山时代的讨论[J].地质科学,2010,45(1):57-65.
[9]冯子辉,萧德铭.塔里木盆地大庆区块烃源岩生烃条件[J].石油勘探与开发,1998,25(2):17-19.
[10]王文革,刘俊峰,张全文.塔里木盆地阿瓦提凹陷石油勘探前景预测[J].大庆石油地质与开发,2001,20(3):18-20.
[11]卢玉红,钱玲,张海祖,等.塔里木阿瓦提凹陷乌鲁桥油苗地化特征及来源[J].海相油气地质,2008,13(2):45-51.
[12]吕海涛,耿锋,伍齐秀.塔里木盆地阿瓦提地区阿北1井三叠系高含有机碳泥岩的发现意义[J].石油实验地质,2011,33(6):587-591.
[13]高志勇,李建军,张宝民,等.塔里木盆地阿-满过渡带中-上奥陶统海相烃源岩的识别及其意义[J].地质勘探,2012,32(5):5-10.
[14]张鼐,王招明,杨文静,等.塔中东部奥陶系烃包裹体特征及成藏意义[J].新疆石油地质,2011,32(3):267-271.
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