黑龙江嫩江三矿沟—多宝山—争光成矿带地质特征与成矿规律

Geological characteristics and metallogenic regularity of the Sankuanggou-Duobaoshan-Zhengguang metallogenic belt in Nenjiang, Heilongjiang Province

三矿沟—多宝山—争光成矿带为东北地区重要的金属矿集区,发育有三矿沟矽卡岩铜铁矿床、多宝山斑岩铜钼矿床、争光浅成低温金矿床等典型矿床。基于已获得的研究成果,结合前人的资料,重点解剖多宝山、三矿沟和争光3个典型矿床的地质特征,发现3个矿床的成矿类型和地质特征大不相同,成矿时代(加里东期、燕山早期和燕山中期)各异。综合地质研究表明,多宝山矿床形成于岩浆弧背景,三矿沟矿床为弧后伸展背景的产物,争光矿床形成于碰撞后陆壳伸展背景。

The Sankuanggou-Duobaoshan-Zhengguang metallogenic belt is an important metal mineralization district in northeast China, where Sankuanggou skarn copper iron deposit, Duobaoshan porphyry copper molybdenum deposit and Zhengguang epithermal gold deposits are developed. Based on the obtained research results and previous data, this work focused on the geological characteristics of three typical deposits of Duobaoshan, Sankuanggou and Zhengguang. It is suggested that the three ore deposits have different metallogenic types and geological characteristics, and also different mineralization epochs(Caledonian, early Yanshanian and middle Yanshanian period). Comprehensive geological researches show that the Duobaoshan deposit was formed in magmatic arc setting, and the Sankuanggou deposit was the product of back arc extension setting and Zhengguang deposit was formed in post-collision continental crust extension setting.