吉林省晚白垩世玄武岩地球动力学意义及油气成藏.pdfVIP

25 4 V ol25 No4 2006 12 GLOBAL GEOLOGY Dec2006 : 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 M a, 及78~ 77 M a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 H UA Yanqiu, SUN Gang, D NG Shuyan, PENG Yujing Regional Surv ey of Geology M ineral Resources, Jilin Province, Changchun 130022 , Jilin, China Abstract: Late Cret aceous basalt in J ilin had undergone volcanic erupt ion event s for four times at least . A mong t hem, t he ages of t he four volcanic events of Fufengshan in Datun are dat ed as 98 Ma, 83~ 82 M a, 80 Ma and 78~ 77 M a, respectively. T he petrolog ic characters indicate that it is closer in g enetic relat ion to the Ceno zoic basalt and some far from t he Early Cret aceous volcanic rocks. T herefore, it appears t o be considered t he Late Cret aceous as t he beginning of the t ect onic magma cycle of t he Himalaya st ag e. T he study of t he Late Cre t aceous basalt in Jilin is import ant for invest igat ion of lithospheric geody nam ics . Oil and g as prospect ing has proved that t he oil and gas accum ulat ion is closely related to t he L at e Cret aceous perdu volcanic cluster in t he Song liao Basin. Key words: basal; L at e Cret aceous; geodynamics; oil and gas accumulation; Jilin Province