SUN Yao-ting1,2*, LI Hui2, SUN Chao2, XIN Ye2, JIANG Rui-bo2, ZHANG Yue2
1. School of Geosciences, China University of Petroleum(Eastern China), Qingdao Shandong 266580, China;
2. Research Institute of Geological Sciences of Shengli Oilfield, SINOPEC, Dongying Shandong 257015, China
Abstract: In this paper, Mesozoic igneous of Zhuangxi area in Jiyang depression as an example, Igneous petrographic sequence and controlling factors were deeply analyzed by triple division: volcanic cycle, stage and facies. Studies have shown that: Volcanic eruption controlled by NNW-trending fault system formed in Late Yanshan epoch, Thrust and negative inversion fault is the primary site of volcanic rocks. Igneous centralized development is divided into 2 long-term cycles,4 mid-term cycles and 7 eruption cycles. 4 kinds of facies are outbreak, overflow, volcanic channel phase and volcanic facies sedimentary. Identified 2 clas sphase sequence combinations: Ⅰ type (relative to the beginning of the outbreak) and Ⅱ type (relative to the beginning of the overflow). Phase sequence combination has the feature that segments in vertical and zonation on flat. Ⅰ type dominated in north and Ⅱ type dominated in south. Ⅰ type mainly developed in Xiwa Formation, Ⅱ type mainly developed in Mengyin Formation.
Keywords: igneous petrographic phase sequence combinations stages Mesozoic Jiyang depression
*Corresponding Author, E-Mail: syt1979@sina.com
Bulletin of Mineralogy, Petrology and Geochemistry Vol. 34, No.1, 2015, page 120-127
