武夷山西南缘构造应力场演化及其与成矿的关系  

Evolution of tectonic stress field in southwestern Wuyishan Mountain area and relationship with mineralization

作　　者：张达[1] 吴淦国[1] 狄永军[1] 吕良冀[1] 姚继明[1] 

机构地区：[1]中国地质大学/地质过程与矿产资源国家重点实验室,北京100083

出　　处：《地质通报》2011年第4期505-513,共9页Geological Bulletin of China

基　　金：中国地质调查局地质调查项目<武夷山成矿带铜多金属成矿规律研究>(编号:1212010533105);<武夷山成矿带中生代推覆构造与铜多金属找矿方向研究>(编号:1212010813064)和<武夷山植被覆盖区成矿地质背景研究与成矿要素综合推断>(编号:1212010070203);国家外专局;教育部高等学校学科创新引智计划项目(编号:B07011)

摘　　要：武夷山西南缘及邻区地处华南特提斯与环太平洋构造域交接地带,自元古宙以来历经了多期次的构造演化,形成了相应的构造应力场。通过对主要古构造运动应力值大小的测定和3个主要构造演化阶段构造应力场数值模拟,得出古应力值自早到晚总体上有增大的趋势,到中生代古应力值强度大且持续时间较长。重要的成矿阶段主要对应区域拉张构造应力场。不同阶段构造应力场模拟结果表明,自前泥盆纪至燕山期,该区主构造线方向从EW—NEE向NE—NNE向转变,与主构造应力场的变化相对应。同时不同时代构造应力的分布为多金属矿产的形成创造了良好的成矿地质条件。The southwestern Wuyishan mountain and its adjacent area is located in the junction between Tethyan and Pacific domains,where tectonic evolutions of multiple phases with special tectonic stress field have been taken place since Proterozoic.According to measuring the main paleo-stress value of different tectonic movement and numeric modeling tectonic stress field controlled by three phase-tectonic movements,it is indicated that plaeo-stress appears increasing intention from early to late.During Mesozoic,the strength of paleo-stress reached highest level and lasted long period compared with other tectonic stages.The most important stages are related to regional extensional tectonic stress field.The tectonic stress field numeric modeling with different stages suggests that,the main direction of tectonic belts is from EW-NEE to NE-NNE,corresponding to the changes of main tectonic stress fields from Devonian to Yanshanian.The distribution of tectonic stress in different stages is favorable to geological condition to mineralization.

关 键 词：古应力值 构造演化 构造应力场 数值模拟 武夷山西南缘 

分 类 号：P542[天文地球—构造地质学]