陕西木龙沟矽卡岩型铁多金属矿床地质特征

陕西木龙沟铁矿床为接触交代矽卡岩型矿床，地质构造单元归属华北古大陆南缘华山一熊耳山陆缘带。矿床主要围岩地层为蓟县系巡检司组，岩体分叉侵入，矿体产于燕山中期花岗闪长斑岩体与巡检司组内、外接触带。矿石成分简单，以磁铁矿为主，其他具有工业意义的金属有钼、锌、铅、铜。通过对该矿床的矿体、矿石特征、蚀变特征的研究，认为该矿床成矿作用主要受构造及中酸性岩浆活动控制，钙镁碳酸盐是成矿的有利围岩。

Geological Characteristics of Mulonggou Skarn Iron Polymetallic Deposits,Shaanxi Province

Mulonggou iron deposit is contact metasomatic skarn type deposit, and its geological tectonic units belong to Taihua ancient land mass of the North China Craton. The main surrounding rock formation is Xunjiansi in Jixian system, invaded by bifurcation. The ores are distributed in the inner and outer contact zone of granite diorite porphyry in middle Yanshanian and Xunjiansi. The mineral composition is simple, including mainly magnetite and other metal of industrial significance, such as Fe, Mo, Zn, Pb, Cu. Based on the metallogenic characteristics of ore body and alteration studied in this paper,, we conclude that the metallogenesis is mainly controlled by geological structure and intermediate-acid magmatic activity, besides, calcium-mag- nesium carbonate is favorable surrounding rock for mineralization.