胶莱盆地岩浆活动特征及其油气地质意义

胶莱盆地及其周缘中新生代的岩浆活动较为强烈,是中国东部及环太平洋岩浆活动带的一部分.侵入岩主要分布于盆地周缘的胶北隆起区和胶南隆起区;火山岩则主要分布于盆地内部及断裂带附近,均受断裂带的控制.通过岩浆活动对盆地内地层有机质成熟度的影响的模拟及分析结果表明,侵入岩对盆地地热场影响不大,而火山岩所产生的热量可能会有利于油气的形成,可能对油气的勘探具有指导意义.

Characteristics and geologic meaning of the magmatic activities in Jiaolai basin

Magmatic activities in Cenozoic and Mesozoic focus intensively in Jiaolai basin and its vicinity, which is a part of eastern China and circum -Pacific magmatic active belt. Irruptive rocks mainly exist in southern and northern uplift areas of the vicinity of the basin, and volcanic rocks mainly exist in the basin and near the faults, both of the two types of rocks are controlled by faults. The influences of magmatic activities on the maturity degree of the organic material in the strata within the basin are simulated and analyzed, the results indicate that irruptive rocks have little impact on the thermal filed of the basin, but the heat produced from volcanic rocks is beneficial for hydrocarbon generation and will direct the exploration and prospecting work.