招平断裂地质特征及形成机制探讨

DISCUSSION ON GEOLOGICAL FEATURES AND FORMATION MECHANISM OF THE ZHAOPING FAULT

摘要:

招平断裂是招掖(掖为掖县,即今莱州市,下同)金矿带主要控矿断裂之一。在招远平度一带大致以夏甸为界呈南北两个“S”形沿北东方向延长近百余公里(图1)。它是胶西北地区沂沭断裂东侧规模最大的断裂。根据它的构造形迹可以判断它具有复杂的演化史,且以左行扭动为主;依其构造岩南北的明显差异反映出该断裂南北具有不同的区域地质背景;它的控矿构造主要型式是逆冲推覆构造。有迹象表明破头青断裂以北地区,即玲珑矿田的控矿机制与招平断裂的发展演化有某种成因联系,而招平断裂的发展演化又直接受沂沭断裂和胶莱拗陷发展演化的制约。

Abstract:

According to the discussion on geology and structural characteristics of the Zhaoping Fault, the authors point out that the Zhaoping Fault has a complex history. The left—handed thrusting and napping took a major part in the development of the Zhaoping Fault. The λ-shaped and antis-shaped trails of fault indicate that the ore control mechanism of the Linglong gold orefield is genetically related to the development and evolution of the Zhaoping Fault, which was immediately controlled by the development and e...