试论郯庐断裂带对胶东金矿集中区形成的巨大作用

GREAT EFFECT OF THE TANCHENG—LUJIANG FRACTURE ZONE ON THE FORMATION OF EASTERN SHANDONG GOLD METALLOGENETIC PROVINCE:A DISCUSSION

郯庐断裂带的巨大的平移活动在其东部地块内所造成的拉伸与挤压相间的构造格局,控制了中国东部一系列重要的金矿集中区,尤其在胶东金矿集中区的形成中的作用最为巨大。它不仅是玲珑热背斜及相关的拆离构造等区域控矿构造系统形成的主要控制因素,而且以其贯通性的韧性剪切作用的深源活化效应和地震泵效应直接参与了金的成矿作用。可以说郯庐断裂带是胶东金矿集中区形成的诸多因素中最主要的因素。

The huge sinistral displacement of the Tancheng-Lujiang Fracture Zone has created a structural pattern with the alternation of extension and compression in the east china continent and controlled a series of important gdd metallogenetic provinces on the east side of the fracture zone.Besides,this great fracture zone itself was directly involved in the gold metallization by its structural activation of katazonal ductile-shearing throughout the crust and its seismic-pumping effect.The origin and development of areal structural system controlling gold deposits in Eastern Shangdong gold province,such as the Linglong granitic complex thermoarch and extensional- shearing fracture system is closely related to the action of the Tancheng-Lujiang Fracture Zone. At all events,the Tancheng-Lujiang Fracture Zone is a primary factor to gold metallization and formation of the metallogenetic province in Eastern Shandong.