大陆韧性走滑在粤西的表现--粤西云开地区深成侵入岩片麻理成因新探

粤西片麻状花岗质岩石的成因历来争议很大,主要有混合岩、同构造花岗岩、花岗片麻岩之争.对于构造的作用机理,更多的人用近水平剪切作用来解释.笔者在1/25万阳春幅、阳江幅区域地质调查中,通过对云开地块变质深成岩中透入性面理和线理及其应变分级的详细填连,认为云开地块核部片麻理组合型式是卵形构造与线性活动带的复合,提出了大陆韧性走滑深层剪切变形的新认识.

SHOWING OF CONTINENTAL DUCTILE STRIKE SLIPPING:AN ATTEMPT ON GENESIS OF GNEISSOSITY OF PLUTONIC ROCKS IN YUNKAI AREA, WESTERN GUANGDONG

There has long been a severe dispute about gneissic granitoid rocks in western Guangdong and the viewpoints of the dispute is concerned about migmatite, syntectonic granite and ganitoid gneiss. Considering about the process mechanism of the structure, most people explain it with near lateral shearing process. It is considered that the gneissosity composition pattern at the core of Yunkai Massif is the complex of spawn structures and linear movement zone and a new understanding of continental ductile strike slipping and deep shearing deformation is proposed through a close mapping of permeating planner joint and lineation, and their strain classifications in metamorphic plutonic rocks in the massif during the regional geological investigation in 1/250000 Yangchun and Yangjiang frame.