海南岛鹦歌岭白垩纪红盆中韧性剪切带的地质特征  

DETERMINATION OF A DUCTILE SHEAR ZONE IN THE CRETACEOUS YINGGELING RED BASIN,HAINAN ISLAND,AND ITS GEOLOGICAL CHARACTERISTICS

作　　者：李孙雄[1] 丁式江[1] 范渊[1] 吕嫦艳[1] 

机构地区：[1]海南省地质调查院,海南海口570206

出　　处：《地质力学学报》2006年第3期387-392,共6页Journal of Geomechanics

基　　金：海南省自然科学基金(编号:40401)项目资助

摘　　要：鹦歌岭白垩纪红盆中的韧性剪切带由糜棱岩系列岩石组成，发育线理、面理和褶皱构造，具有拆离活动的运动学特征。变形差应力变化在27．2～66．2MPa之间，变形温度高于500℃。近垂直的挤压和近水平的伸展显示剪切带的形成与深部岩浆上侵作用有关，对进一步认识海南岛燕山期构造岩浆作用以及岩浆侵位机制具有重要的地质意义。A ductile shear zone has been found for the first time in the Cretaceous Yinggeling red basin, Hainan Island. It consists of mylonites and have well-developed lineation, foliation and fold structure, as well as the kinematic characteristics of detachment. The differential stress for deformation ranges from 27.2 to 66.2 MPa and the deformation temperatures are 〉 500℃. Subvertical compression and subhorizontal extension suggest that the formation of the shear zone is related to intrusion of deep-seated magma. This has great geological significance for a further understanding of the Yanshanian tectonomagmatism and magmatic emplacement mechanism on Hainan Island.

关 键 词：白垩纪红盆 韧性变形 地质特征 海南岛 

分 类 号：P542[天文地球—构造地质学]