吉林省晚白垩世玄武岩地球动力学意义及油气成藏_花艳秋.pdfVIP

25 4 Vol25 No4 2006 12 GLOBAL GEOLOGY ec2006 : 1004 5589 (2006) 04 0385 05 吉林省晚白垩世玄武岩地球动力学意义及油气成藏 花艳秋, 孙罡, 丁淑燕, 彭玉鲸 (, 130022) : 吉林省晚白垩世玄武岩至少经历了4期以上的火山喷发事件, 其中大屯富峰山的4 期火山事件 代分别是: 98 Ma, 83~ 82 Ma, 80 Ma, 及78~ 77 Ma研究表明, 其岩石特征与早白垩世火山岩 疏远, 而与新生代玄武岩更具亲缘性; 因此可将晚白垩世视为喜山期构造 岩浆阶段的开始吉林省 晚白垩世玄武岩的研究对探讨中国东部岩石圈地球动力学具有重要意义油气勘察证明, 隐伏的晚白 垩世火山群与油气成藏关系密切 : 玄武岩; 晚白垩世; 地球动力学; 油气成藏; 吉林省 : P53453; P588145 : A Geodynamic significance of Late Cretaceous basalt in Jilin and its relation with oil and gas accumulation HUA Yan-qiu, SUN Gang, ING Shu-yan, PENG Yu-jing Regional Surv ey of Geology M ineral Resources, Jilin Province, Changchun 130022, Jilin, China Abstract: Late Cretaceous basalt in Jilin had undergone volcanic eruption events for four times at least. A- mong them, the ages of the four volcanic events of Fufengshan in atun are dated as 98 Ma, 83~ 82 Ma, 80 Ma and 78~ 77 Ma, respectively. The petrologic characters indicate that it is closer in genetic relation to the Ceno- zoicbasalt and some far from the Early Cretaceous volcanic rocks. Therefore, it appears to be considered the Late Cretaceous as the beginning of thetectonicmagma cycleof the Himalaya stage. T he study of the Late Cre- taceous basalt in Jilin is important for investigation of lithospheric geodynamics. Oil and gas prospecting has proved that the oil and gas accumulation is closely related to the Late Cretaceous perdu volcanic cluster in the Songliao Basin. Key words: basal; Late Cretaceous; geodynamics; oil and gas accumulation; Jilin Province , () 1 , [ 1] , : ,