关于多旋回开合构造及区域成矿若干观点的认识

板块说与槽台说相结合是研究大陆演化和矿产形成的重要理论依据。开合构造、板块构造与槽台构造三者在形成机制上具有内在的联系。多旋口开合构造是指以多旋回开合观点研究的构造，它是研究开合过程中所有地质现象，包括开合序列、开合旋回等。开合构造的主要表现形式包括区域性断裂，地壳的扩张与挤压，地壳的水平运动与垂直运动，构造过渡与构造迁移。开合演化过程称为“多旋回四阶段开合递进律”。开合构造的主要特征具有多旋回性、方向性、不平衡性、迁移性、两重性、层次性和有限性等。开合构造和岩石圈演化的基本动力是地球内部热能运转的结果，导致地壳和岩石圈裂开和聚合运动，包括传送带式、手风琴式和雪撬式三种主要的不同运动方式。正是多旋回开合构造发展，导致了多旋回成矿作用。在研究矿床分类时，首先要以多源的成矿物质来源作为矿床分类的主要依据，同时，也需要注意结合诸如成矿作用、成矿构造环境、成矿理化条件以及含矿建造等因素，以多旋回开合构造一成矿的观点来研究成矿控制和成矿规律。

SOME KNOWLEOGE ON POLYCYCLE OPEMNG-CLOSING TECTONICS AND REGIONAL MINERALIZATION

Plate tectonics and geosgncline-platform theory in combination built a theorectital foundationfor studying continental evolution and minerals'formation.The opening-closing teCtonics is inherently relatedwith plate tectonics and geosnyline-platform tectonics.It involves the whole geological phenomena in theprocess of opening-closing, including the opening-closing sequence and cycles.The main demonstrations ofopening-closing tectonics cover regional fracturing, spreading and compression of the crust; horizontal andvertical movement of the crust, and transmittion and migration of the tectonics. The openins-closins processis called "progressive ac polycyclic four-stage opening-closed law",. It is wily characterized by polycycles,unbalance, migration, duality, unity and coherence and also limitation. The primary force of the openingclosing tectonics and lithospheric evolution comes from the transmittion of the thermal energy, which bringsabout the divergency and convergency of the lithosphere. The mode of movement mainly includes conveyorbelt type, accordion type and sled type. It is the pclycyclic-closing tectonics that leads to the polycyclic mineralhations.The plural material sources plan the main role in the classifitation of deposits, coupledwith the mineraihation, tectonic settings, physical and chemical conditions, and ore formations, etc. Theview of polycyclic opening-closing tectonics-mineralization is applied to study mineralization control and min-etalization resularity.