摘要
成矿系统的形成、演化与区域构造演化和地球动力学行为有关，成矿系统动力学是确定成矿系统演化和最终结果的关键，其研究是对传统成矿理论的突破，具有重要的理论与实践意义。胶东地区长期处于大陆边缘，构造成岩成矿作用过程表现出复杂性和多样性：（１）太古宙—元古宙绿岩地体产生、形成———金的矿源系统雏形；（２）古生代构造环境稳定———金成矿作用间歇；（３）中生代绿岩带强烈活化改造———构造成岩成矿；（４）新生代构造继承性活动———后期构造破矿作用。胶东金矿集中区是典型的剪切带构造成矿系统，是区域尺度地质作用的产物，其形成、演化受大陆岩石圈和深断裂成熟度控制，与太平洋区板块俯冲碰撞及郯庐断裂带的形成、演化紧密相关，其发生和作用过程及演化受地壳演化和地球动力体制转换制约，与区域构造的形成、演化相互关联。“断裂阀地震泵吸周期性破裂愈合”的构造动力体制转换是成矿物质活化、运移、聚集、成矿的基本动力学保障，构造应力场转换是其重要表现形式。
Metallogenic system is the component of materials system of the Earth.It has multi level embedded construction,the regional metallogenic system is the key and core for the study. Metallization is one of the expression form of dynamic functions of the Earth.The formation and evolution of metallogenic system is related to regional tectonic evolution and dynamic action of the Earth.Dynamics is the key to determine the system evolution and final results.The research of dynamics of metallogenic system is a breakthrough at the traditional metallogenic theory,and it is of great theoretical and practical significance. The Jiaodong area is located at the continental margin for a long time,where is characterized by active interactions between the Earth's crust and the mantle, by complicated tectonic movements,frequent interexchange of materials and energy within various sphere of the Earth,so its metallogenic processes display some complex and different natures: (1) the Archean Proterozoic greenstone terrane the embryonic form of Au source system formed; (2) stable tectonic setting in Paleozoic era caused a intermittence in Au oregenic process; (3) the greenstone belt was reacted and revised vehemently in Mesozoic era tecto mineralization and tecto lithogensis; (4) former structures reacted in Cenozoic era the structure action after orogenesis destroyed orebodies.The gold ore deposits concentrated area in Jiaodong is one typical metallogenic system in shear zone tectonics.It is the product of geological processes in regional scale.Its formation and evolution are controlled by the continental lithosphere and the maturity of deep fault, and are closely related with the formation and evolution of Tanlu Fault Zone and plate subduction collision jams.The occurrences and processes of metallogenic system are controlled by the crust evolution and the transformation of dynamic system of the Earth,and are interconnected with the formation and evolution of the regional structures. At the end of the paper, based on the researches of the transformation of tectonic stress field and the dynamics of metallogenesis,the authors put forward that the transformation of tecto dynamic mechanism gave a dynamic guarantee to mineralizing material to react,transport,gather and mineralize, the transformation of tectonic stress field is one of its most manifestation,and the mineralization of gold took place on the space time interface where shear strain deformed structural lithofacies transformed to shear tension deformed structural lithofacies.
出处
《地学前缘》
EI
CAS
CSCD
1999年第2期315-323,共9页
Earth Science Frontiers
基金
地质矿产部重点科技项目
国土资源部"百名跨世纪科技人才培养计划"基金
国家科技攀登计划项目
国家计划委员会科技项目
关键词
成矿系统
构造演化
成矿动力学
金矿床
断裂
metallogenic system,tectonic evolution,maturity of de ep fault,transformation of tectonic stress field,metallogenic dynamics
