论文部分内容阅读
阐述了大梨树沟铜钼矿的成矿地质背景,经分析研究认为该区中生代火山活动和浅成、超浅成岩浆(钙碱性)侵入作用是形成斑岩型矿床的有利条件。成矿区处在隆凹边部的隆起区,火山活动强烈、发育有火山岩颈,次火山岩及浅成、超浅成燕山期中—中酸性侵入体,发育不同方向的控矿和容矿断裂构造,围岩蚀变也很发育,并具蚀变分带特征,具有斑岩成矿地质条件。在已知的火山口区和东部脉体群分布区及东侧的双河沟区均有很好的物化探异常和矿化线索,说明该区具有很好的找矿远景。
The ore - forming geological background of the Daershugou copper - molybdenum deposit is described. According to the analysis and research, the Mesozoic volcanic activity and shallow and ultramafic magmatic (calc - alkaline) intrusions are favorable conditions for the formation of porphyry deposits. The metallogenetic zone is located in the uplifted area of the Longqian margins. The volcanic activity is intense. There are volcanic neck, subvolcanic rocks and medium to medium acid intrusions in the shallow and ultra-shallow Yanshanian stages, and the ore-controlling and ore-hosting faults in different directions are developed. Surrounding rock alteration is also very developed, with alteration zoning characteristics, with porphyry metallogenic geological conditions. There are good geophysical and geochemical anomalies and mineralization clues in the known distribution of the caldera in the crater area and the east and Shuanghegou area in the east, indicating that the area has a good prospecting prospect.