青海加给陇洼东金矿地质特征及找矿预测

加给陇洼东金矿是近年来青南地区发现的颇具规模的金矿,成因上属浅成低温热液型金矿。从矿床地质特征出发,结合周边大场金矿的特征,探讨了该矿床的控矿因素:(1)加给陇洼东金矿赋存于与深大断裂平行展布的次级破碎带中,甘德—玛多深大断裂是本区重要的导矿构造,与该构造平行排列的次级断裂是本区唯一的容矿构造;(2)构造运动与成矿关系极为密切,成矿作用始于海西—印支早期,印支晚期达到高峰,为主要成矿期,断裂构造的多期活动,为区内金矿的形成提供了通道和空间及相应的热液,深源岩浆活动及变质作用,为金矿的形成提供了重要的物源和热液。矿区外围找矿预测应围绕甘德-玛多深大断裂的次级断裂开展工作,尤其石英脉比较发育地段作为重点区域进行必要的工程揭露。

Geological features and prediction of Jiageilongwa gold deposit in Qumalai County, Qinghai Province

Jiageilongwa gold mine is a large scale gold mine found in the Qingnan area in recent years. It is a shallow low-temperature hydrothermal gold mine. Based on the geological characteristics of the deposit and the characteristics of the surrounding Dachang Gold Mine, it is discussed the controlling factors of this ore;(1) Jiageilongwa gold deposit founds in secondary fracture bands that are spread parallel to deep faults, the Gande-Maduo deep fracture is an important mineral conducting structure in the area,The secondary fracture is the only mineral bearing structure that arranged in parallel with the structure in the area;(2) The relationship between tectonic movement and metallogenesis is very close, The mineralization began in the early stage of the Haixi-India branch, and the late stage of the Indian branch reached its peak, which was the main metallogenic period. The multi-phase activities of fault structure provide the passage and the space for the formation of gold mines in the area and the corresponding hydrothermal, deep source magmatic activity and metamorphism, and provide important source and hydrothermal agent for the formation of gold mines. The prediction of prospecting in the mining area should be centered on the secondary fracture of Gander-Mado deep fracture, especially the quartz vein comparative development area as the key area for the necessary engineering disclosure.