地质通报2018，Vol.37Issue(2)：167-191,25.
混杂岩基本特征与专题地质填图
摘要
Abstract
Mélange is the commonest geological body and the most fundamental tectonic facies of the orogenic belt around the world.It represents a mappable(1:25000 or more)geological unit formed by multiple geological processes and consists of blocks and matrix showing high stratigraphic disruption and a chaotic internal structure. The formation environment of mélanges is unequal to their emplacement environment,and hence not all of the mélanges were formed around the plate boundary reflecting plate tectonics. Ophiolitic mélanges and accretionary complexes can be used as the direct discriminating marks of ancient oceanic basin and conver-gent plate boundaries,and their texture and composition as well as spatial and temporal relationship have coevally recorded the devel-opment of oceanic plate stratigraphy and the lateral and vertical growth of the continental crust.On the basis of an ideal model of oce-anic plate stratigraphy(including seamount)and Penronse ophiolite sequence,thematic geological mapping is the most effective way to clarify the texture and composition, spatial and temporal relationship, and formation mechanism of mélanges. The data obtained can provide direct evidence for reconstructing ocean-continental framework and improving our knowledge on the texture of orogen-ic belts,and can also guide mineral deposit exploration and ore prospecting plan.关键词
造山带/混杂岩/蛇绿混杂岩/增生杂岩/专题地质填图Key words
orogenic belt/mélange/ophiolitic mélange/subductionary complex/thematic geological mapping分类
天文与地球科学引用本文复制引用
闫臻,王宗起,付长垒,牛漫兰,计文化,李荣社,祁生胜,毛晓长..混杂岩基本特征与专题地质填图[J].地质通报,2018,37(2):167-191,25.基金项目
中国地质调查局项目《秦祁昆结合部构造事件调查及增生杂岩带专题填图试点》(编号:DD20160201-04)和国家自然科学基金项目《拉脊山早古生代海沟-岛弧体系演化研究》(批准号:41672221) （编号:DD20160201-04）
