内蒙古赤峰郊区索虎沟金矿矿脉与煌斑岩的成因联系

本文在对索虎沟金矿区域地质背景、矿床地质地球化学和金的成矿作用的研究基础上,对煌斑岩的归属、地质地球化学特征及煌斑岩的形成时代和成因机制进行了讨论,着重对金矿脉与煌斑岩的密切时空关系和成因联系进行了剖析,最终确立了索虎沟金矿的煌斑岩成矿模式。煌斑岩与金矿代表了同一构造岩浆活动中两次既相对独立又有联系的热事件的产物,与上地幔和下地壳的局部重熔和岩浆分离结晶有关。

THE GENETIC RELATIONSHIP BETWEEN GOLD-BEARING QUARTZ VEINS AND LAMPROPHYRE IN SUOHUGOU GOLD DEPOSIT IN THE SUBURB OF CHIFENG, INNER MENGOLIA

Based on the research of the geological setting, geochemistry and minerogenesis ofSuohugou gold deposit this paper discussed the sort, geological and geochemical characters,lithogenic time and genesis of lamprophyre in the mentioned area and especially focused on thetemporal, spacial relationships and genetic connection between gold quartz- bearing veins andlamprophyre, these are as follow:1. The close relationship between gold quartz - bearing veins and lamprophyre was occurredin the similar components of the trace typhonic element from the mantle. 2. At large amounts ofthe volatile components (e. g. H_2O, CO_2, S~2-, F_-, C1~- etc. ) were carried by lamprophyreemplacemet, that added to the metallogenetic liquid of gold mineralization. 3. The cooling andlatent heats resulted from emplacement and crystalization of the lamprophyre magma providedwith definite heat energy for the gold mineralization. 4. The "boundary effect" resulted from thedifference of the physical - chemical properties between lamprophyre and its surrounding rocks(the granite intrusive body) provided with the conditions for the gold deposition. 5. The closelylink between the gold - bearing quartz and lamprophyre in the definite regional structurebackground. In the end, the metallogonic model of formation of the Suohugou gold deposit wasestablished.