一、地质概述及样品分布临邑盆地是华北地区典型的中新生代断陷盆地之一,位于济阳坳陷西部,面积4000平方公里。盆地受北东东向基底断裂控制,经历了早期断陷、中期断拗、晚期整体拗陷三个发育阶段,并伴随有频繁的火成岩活动,尤以盆地的东南部较集中。渐新世晚期,由于盆地中央一组北东东至近东西向断裂活动影响,盆地被分割为两个凹陷,并逐渐发 I. Geological Overview and Sample Distribution The Linyi Basin is one of the typical Mesozoic-Cenozoic rift basins in North China. It is located in the western Jiyang Depression and covers an area of ​​4,000 square kilometers. The basin is controlled by NE-trending basal faults and experienced three stages of early fault depression, mid-term fault depression and late whole depression with frequent igneous activities, especially in the southeastern part of the basin. In the late Oligocene, the basin was divided into two depressions due to a series of NE-to-EW faults activities in the central basin and gradually developed