ANALYSIS OF THE HEAVY MINERALS CHARACTERS AND PROVENANCE DIRECTION OF PALEOGENE IN FANGZHENG FAULT DEPRESSION

Find out the provenance direction in study area for the sandbody distribution、 reservoir prediction and the trap evaluation is great significance.Based on the Fangzheng fault depression Xinancun+Wuyun Formation,Dalianhe Formation,Baoquanling Formation of heavy mineral assemblages,combined with heavy mineral ZTR index analysis results,the regional tectonic evolution.Pointed out that the provenance of the Paleogene mainly from the west,northwest,southeast and northeast four directions.there is a big difference in the provenance system and the content of heavy mineral assemblages reflect the source attributes.In the plane to Yihantong fracture is bounded remarkable characteristic of zoning,vertical heavy minerals and provenance has certain inheritance,the ZTR index changes of descending that t the Fangzheng fault depression experienced from broke the falling initial period far provenance to break the transformation time is approaching provenance evolutionary process.