济阳坳陷桩西地区中生界火成岩岩相序列  

Petrographic Sequence of the Mesozoic Igneous Rock in the Zhuangxi Area,Jiyang Depression

作　　者：孙耀庭[1,2] 李辉[2] 孙超[2] 辛也[2] 姜瑞波[2] 张悦[2] 

机构地区：[1]中国石油大学(华东)地球科学与技术学院,山东青岛266580 [2]中国石化胜利油田分公司地质科学研究院,山东东营257015

出　　处：《矿物岩石地球化学通报》2015年第1期120-127,共8页Bulletin of Mineralogy, Petrology and Geochemistry

基　　金：国家科技攻关项目(2008BA613A)

摘　　要：本文以济阳坳陷桩西地区中生界火成岩为例,采用旋回-期次-岩相三级划分方案,对火成岩岩相序列进行了深入分析。研究表明:火山喷发受控于燕山晚期发育的北北西向断裂体系,逆冲断层和负反转断层是火山岩发育的主要部位。火成岩集中发育段划分为2个长期旋回、4个中期旋回和7个喷发旋回,发育爆发相、溢流相、火山通道相和火山沉积相4种岩相类型,存在Ⅰ类(以爆发相开始)和Ⅱ类(以溢流相开始)2种相序组合。相序组合具有"垂向分段,平面分带"的特征,北部以Ⅰ型为主,南部以Ⅱ型为主;Ⅰ型主要发育于西洼组,Ⅱ型主要发育于蒙阴组。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.

关 键 词：火成岩 岩相 相序组合 期次划分 中生界 济阳坳陷 

分 类 号：P618.13[天文地球—矿床学]