合肥盆地中—新生界烃源岩地球化学与构造背景分析

GEOCHEMICAL AND TECTONIC ANALYSIS OF THE MESOZOIC AND CENOZOIC HYDROCARBON SOURCE ROCKS IN THE HEFEI BASIN

中—新生代合肥盆地受EW向特提斯构造和NNE向滨西太平洋构造等多元构造动力的控制,具有成盆期次多、构造运动频繁、沉降量和伸展量小、卷入构造层次浅等特点。这些特点对中—新生界烃源岩的发育及其有机质的转化是不利的。而古生界应为今后勘探的重点。

Controlled by multivariate dynamics such as the EW-oriented Tethys tectonic zone and the NNE-oriented West Pacific Ocean border tectonic zone, the Hefei Basin has the following characteristics: multi-period of basin formation, frequent tectonic movement, small scale of sedimentation and extension, and involving superficial tectonic layers only. These features are unfavorable to the formation of Mesozoic and Cenozoic hydrocarbon source rocks and the inversion of organic matter in Hefei Basin. However, the (Paleozoic) should be the focal point for the future exploration.