摘要
辽宁青城子矿田为不同矿种重要成矿集中区。古元古代裂谷沉积建造是区域成矿的基础，此后经历了古元古代钾质花岗岩上侵－ 地壳伸展、中元古代钠质花岗岩侵入、印支期岩浆侵入活动和燕山期构造岩浆活动等４ 次主要构造热事件。在青城子矿田内４ 次构造热事件的热点在空间上比较集中，后生构造活动的热点往往在前一次热点的边缘或附近地区，具有明显“同位”的特征，这是出现同位成矿作用致关重要的条件。只有与成矿作用有关的热点趋于同一空间部位产出，受这种多期构造热事件的驱动，成矿流体才能稳定、有序地向同一构造空间部位迁移、沉淀。这种同位成矿作用是形成青城子矿化集中区的重要机理。
The Qingchengzi ore field is a favourable home to several mineral deposits. The sedimentary formation formed in Paleoproterozoic rifting laid the basis for the regional mineralization. After the rifting, it witnessed four major tectonic-hydrothermal events: intrusion of Paleoproterozoic potassic granite and extension of crust, intrusion of middle Proterozoic sodium granite, Indosinian magmatic intrusion and Yanshannian magmatic activites. Driven by multiple tectonic-hydrothermal events, the Ore-forming fluid was constantly transferred into same strructures. The isospatial metallogenesis is the important ore-forming mechanism for forming of the ore clusters in the Qingchengzi ore field.
出处
《矿产勘查》
1999年第5期277-282,共6页
Mineral Exploration
关键词
辽宁
成矿集中区
构造热事件
同位成矿
Liaoning
ore clusters
tectonic-hydrothermal event
isospatial metallogenesis
