超高压榴辉岩流变学研究  

Study on Rheology of Ultra-High Pressure Eclogite

作　　者：金振民[1] 章军峰[1] 刘祥文[2] 王璐[1] 

机构地区：[1]中国地质大学地球科学学院,湖北武汉430074 [2]中国地质大学地质过程与矿产资源国家重点实验室,湖北武汉430074

出　　处：《现代地质》2007年第2期183-194,共12页Geoscience

基　　金：国家自然科学基金项目(40172068);美国自然科学基金项目(EAR#003631)

摘　　要：大陆岩石圈和大洋岩石圈在成分、厚度和力学强度方面有明显的差别。因此,现有板块构造不完全适合于大陆构造。大陆地壳和上地幔流变学的综合研究是认识大陆构造最佳途径之一。流变学研究是大陆造山带几何学、运动学和动力学的桥梁。大陆岩石圈对构造作用、重力不稳定性和热结构的响应在很大程度上取决于岩石流变强度。岩石圈流变性质是岩石圈分层、构造复杂性和塑性流动的主导控制因素。超高压榴辉岩在地幔对流、壳-幔物质循环和俯冲带动力学起着重要作用。榴辉岩的流变性质和变形机制对于阐明大陆造山带和大陆深俯冲的动力学过程具有十分重要的意义。本文主要内容包括以下4个方面:(1)岩石流变学研究在地球动力学中地位和重要性;(2)回顾池际尚先生对岩石流变学实验的贡献;(3)近几年来超高压榴辉岩流变学研究成果;(4)国外岩石流变学实验研究发展态势和启示。Continental lithosphere is significantly different from oceanic lithosphere in the aspect of composition, thickness and mechanical strength. Therefore, plate tectonics is not entirely applied to continental tectonics as well. Comprehensive study for rheology of continental crust and the upper mantle is the best approach to understand continental structure and beyond plate tectonics. Rheology is the liaison between geometry and kinematics as well as dynamics of continental orogen. Response of continental lithosphere to structure, gravitation instability and thermodynamics largely depends on its rheological strength. Eclogite plays an important role in mantle convection and dynamics in subduction zone. Information on eclogite rheology is of great implication for understanding of collision belts and the deeper levels of subducted zone. The objectives of the present paper are. （ 1 ） to elucidate the place and the significance of rock rheological study in geodynamics; （2）to recall Professor Chi Jishang＇s contributions to experiment on rock rheology and petrofabric study; （3）to present new results on rheological properties of eclogite; （4）to propose suggestions enhancing rheological experiment of rock at high temperature and high pressure.

关 键 词：岩石流变学 高温高压实验 超高压榴辉岩 变形机制 池际尚 

分 类 号：P588.3[天文地球—岩石学]