河北张-宣地区水泉沟偏碱性杂岩体的起源和形成机制及地质意义

刊出日期: 1992-03-31

ORIGIN AND FORMING MECHANISM OF SHUIQUANGOU SUBALKALI COMPLEX IN ZHANGJIAKOU-XUANHUA AREA, HEBEI

Publish Date: 31 March 1992

摘要: 中生代太平洋板块俯冲、崇礼-赤城大断裂继承性活动,在板块内部壳幔作用增强,形成偏碱性岩浆。偏碱性岩浆演化成4个独立的岩石系列,11种岩石类型。岩浆形成机制主要是深部物质部分熔融。岩浆多幕性活动,沿区域性大断裂侵位,形成东西向展布的线状岩基。偏碱性岩浆杂岩带与金矿密切的时空关系,为找金工作指明了方向。
- 偏碱性杂岩 /
- 岩石系列 /
- 起源
Abstract: Subalkali magma was formed under environment of subduction of pacific plate in Mesozoic, inherited activity of Chongli-Chicheng fault and strengthening of interaction of crust and montle in plate. There are four independent series of rock with eleven kinds or rock in subalkali rocks zone. The forming mechanism of the magma is partly melting of deep material, multiple activity of magma, emplacing along regional great fault forming E-W trending linear batholith. The subalkali complex zone is related closely with gold deposits in time and space.