石油实验地质Issue(2)：259-266,8.DOI:10.7603/s40972-015-0040-4
鲁西地区晚中生代-古近纪伸展构造的应力场数值模拟
Numerical simulations of tectonic stress fields for Late Mesozoic-Paleogene extensional tectonics in western Shandong
摘要
Abstract
Extensional tectonics in the West Shandong Uplift were examined and geological models were established using field geological survey data of the western Shandong and the geophysical data of the Jiyang Depression . Based on a finite element method, we adopted the Ansys12. 0 software to carry out a 3D tectonic stress field numerical simulation of the extensional tectonic evolution of the study area from the Late Mesozoic to Paleogene, which fit well with the actual geological conditions. The results indicated that the tectonic stress field evolved from strong to weak from the Late Mesozoic to Paleogene, and the maximum principal stress axis transferred from NW-SE to NWW-SEE, and then to NE-SW, which was a major shift. Paleocene-Early Eocene was a transitional period with its stretching orientation transformed from NE-SW to NS, and Eocene-Oligocene was a significant phase for uplift⁃depression differentiation when the West Shandong Uplift and the Jiyang Depression became separated and evolved separately. This evolution regularity had an important control on the migration and accumulation of oil and gas in the Jiyang Depression and the enrichment of metallic minerals in the West Shandong Uplift. The essential factors leading to the tectonic evolution were the changes of the Pacific Plate subduction, the strike slipping motion along the major boundary fractures, and the magma under plating.关键词
应力场/数值模拟/伸展构造/晚中生代-古近纪/鲁西地区Key words
tectonic stress field/numerical simulation/extensional tectonics/Late Mesozoic-Paleogene/western Shandong分类
能源科技引用本文复制引用
胡秋媛,李理..鲁西地区晚中生代-古近纪伸展构造的应力场数值模拟[J].石油实验地质,2015,(2):259-266,8.基金项目
国家自然科学基金项目（40772132）和中国石油大学胜利学院春晖计划重点项目（13070901）共同资助。 （）
