摘要
河北省丰宁二道沟-北灰窑银多金属矿区地处大窝铺-上黄旗构造岩浆岩成矿带西部,多组深大断裂交会区域,断裂构造、岩浆热液活动发育,构成该区主要成矿地质背景。已发现营房银铅锌矿床、北岔沟门铅锌矿床和牛圈银金矿等众多大型—中型铅锌银金矿床,区域矿床成矿与燕山期岩浆活动和断裂构造活动密切相关。通过1∶1万土壤地球化学测量数据分析,该区Pb,Ag,Zn元素富集,主成矿元素组合异常发育,共圈定出4个组合异常,化探异常与矿(化)体相吻合。区内已发现8条蚀变矿化带,矿体形态、产状及矿化范围严格受断裂构造控制。通过不同地质体微量元素地球化学特征分析可知,燕山期花岗岩岩体和红旗营子群地层内Ag,Pb,Zn元素属于富集型和强分散型,利于成矿,同时为该区成矿提供了丰富的物质来源。绿泥石化、褐铁矿化、黄铁矿化、铁锰矿化等是识别蚀变带的有利标志,亦是寻找银多金属矿的重要标志。二道沟-北灰窑银多金属矿区属于受断裂构造控制的中低温热液矿床。通过对区域成矿地质条件和矿区地质特征的分析,总结了该区的控矿因素、成矿物质来源和矿床类型,为进一步地质勘查工作指明了方向。
Erdaogou Beihuiyao silver polymetallic deposit is located in the west ol Dawopu Shanghuangqi tectonic magmatic metallogenic belt. It is a intersection region ol many deep faults. Tectonic, magmatic hydrothermal activity developed well and constituted main metallogenic geological background ol this area. A number ol large and medium sized lead zinc silver gold deposits, such as Yingfang silver lead zinc deposit, Beichagoumen lead zinc deposit and Niujuan silver gold deposit have been found. Regional deposit forming is closely related to magmatic activity in Yanshan period and tectonic activity. Through soil geochemical survey data analysis with the scale of 1 ： 10000, three elements as Pb, Ag and Zn enriched in this area. Main ore forming elements combination developed abnormally. Four combination anomalies have been circled, and geochemical anomaly is consistent with ore body. Eights mineralization alteration zonesThave been found. Shape, occurrence and mineralization of ore bodies are strictly controlled by faults. Through analysis on different geological geochemical characteristics of trace elements, it is showed that the formation of Ag, Pb, Zn elements belong to the rich and strong dispersion type in Yanshan gran-ites and Hongqiyingzi group. It provides a rich source of materials for mineralization. It is a good sign to identify the alteration zone, and it is also an important indicator to find silver polymetallic ore. Erdaogou Beihuiyao silver poly-metallic deposit belongs to middle low temperature hydrothermal deposit controlled by fracture structures. Based on the analysis of regional metallogenic geological conditions and geological characteristics of the mining area, the ore controlling factors, the source of ore forming materials and the types of deposits in this area have been summa-rized .
出处
《山东国土资源》
2017年第7期37-43,共7页
Shandong Land and Resources
基金
基金项目:河北省丰宁满族自治县四岔口乡二道沟-北灰窑银多金属矿普查(编号:冀国土资勘便字[2012]088号)
关键词
二道沟-北灰窑
银多金属矿
地质特征
控矿因素
河北省丰宁
Erdaogou Beihuiyao
silver polymetallic deposit
geological characteristics , ore controlling factors
Fengning in Hebei province
