| 塔里木盆地早二叠世岩浆特征及其对油气成藏关系初探 |
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| 引用本文：徐汉林,方乐华,张昕,胡军,朱海燕.2006.塔里木盆地早二叠世岩浆特征及其对油气成藏关系初探[J].地球学报,27(3):235-240. |
| DOI：10.3975/cagsb.2006.03.07 |
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| 中文摘要:塔里木盆地早二叠世裂谷盆地阶段有一次强烈的岩浆活动,主要为玄武岩—中酸性凝灰岩喷发和大规模基性岩墙群的侵入,玄武岩K-Ar法同位素年龄为241~278Ma,而辉长岩的Sm-Nd法年龄为259Ma。火山活动产生的能量使得塔里木盆地内的寒武系—奥陶系烃源岩大量生烃并运移,自生伊利石K-Ar年龄测定数据显示哈得4石炭系油藏、塔中4CⅢ油藏油气充注时间为224~275Ma,与上述火成岩的活动时间相当。东河砂岩,一套深埋的优质储层,其形成的原因可能是二叠纪末油气的注入并导致其后期深埋时只有机械压实而无其他成岩作用的缘故。 |
| 中文关键词:火山活动 同位素年龄 伊利石 油气成藏期 塔里木盆地 |
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| Characteristics of Early Permian Magmatic Rocks and Their Impact on Hydrocarbon Accumulation in Tarim Basin |
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| Abstract:There was an intense volcanic activity in the rift basin of Tarim Basin in Early Permian. It consisted of eruption of basalt as well as medium-acidic tuff and massive intrusion of basic dike. The K_Ar isotopic age of the basalt is 241～278 Ma, and the Sm_Nd isotopic age of the gabbro is 259 Ma. The energy of the volcanic activity caused the Cambrian_Ordovician source rocks to produce plentiful oil and gas and forced them to migrate. The data of the K_Ar isotopic age of the authigenic illite show that the filling time of oil and gas in the Carboniferous reservoir of Hade 4 oil field and Tazhong 4 oil field is 224～275 Ma, identical with the time of volcanic activity. Donghe sandstone, as a high_grade deeply_buried reservoir, is responsible for the phenomenon that the filling of oil and gas at the end of Permian caused only mechanical compact but no other diagenetic activities in late deep burial process. |
| keywords:volcanic activity isotopic age authigenic illite petroleum accumulation stage Tarim Basin |
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