福建中—北部马面山增生杂岩地质特征及其构造演化

Geological Characteristics and Tectonic Evolution of Mamianshan Hyperplastic Miscellaneous Rock in Central-northern Fujian Province

在系统归纳“马面山增生杂岩”的空间分布特征及不同岩片的地质特征的基础上,区域内划分出新元古代陆缘弧、新元古代俯冲增生带和早古生代俯冲增生带,并进一步划分出一系列增生杂岩岩片。将马面山增生杂岩的形成、发展和演化过程划分为5个阶段,与马面山增生杂岩形成有关的古华南洋洋盆自新元古代开始发育,持续演化至早古生代,最终在早古生代末—晚古生代初完成了洋陆转换过程。伴随着洋陆转换,洋板块的俯冲作用导致洋盆地层系统卷入俯冲增生活动,形成增生杂岩的基质及岩块系列。马面山增生杂岩形成后又经历多期次的陆内构造叠加、改造,从而形成现今地质格局。

On the basis of systematically summing up the spatial distribution characteristics of the"Mamianshan hyperplastic miscellaneous rock"and the geological characteristics of different rocks,the new proterozoic continental arc,new proterozoic dive hyperplasia zones were divided in the region,and a series slivers of hyperplastic miscellaneous rock are further divided.The formation,development and evolution of the accretionary complex in Mameishan can be divided into five stages.The ancient south yangbasin related to the formation of mamianshan hyperplasia began to develop from the new Proterozoic.Finally,the conversion process was completed from the end of the early Paleozoic to the beginning of the late Paleozoic.With the conversion of ocean-land,the subduction of the oceanic plate causes the oceanic basin formation system into the subduction and hyperplasia activities,forming the matrix and rock series of hyperplastic miscellaneous rock.After the formation of the Mamianshan hyperplastic miscellaneous rock,it experienced multiple stages of intracontinental structure superposition and transformation,thus forming the current geological pattern.