基于GIS的北塔山地区金成矿远景信息量法预测  

Study of Gold Mineralization Prospect Prediction Based on GIS and Information Method in the Beitashan Region

作　　者：孙亚飞 陈明 张博文 展新忠 王雅聪 彭昊伟 SUN Yafei;CHEN Ming;ZHANG Bowen;ZHAN Xinzhong;WANG Yacong;PENG Haowei(School of Geology and Mining Engineering,Xinjiang University,Urumqi Xinjiang 830017,China;Xinjiang Key Laboratory of Continental Dynamics and Metallogenic Prognosis of Central Asian Orogenic Belt,Xinjiang University,Urumqi Xinjiang 830017,China;Zhejiang Tunnel Engineering Group Co.Ltd.,Hangzhou Zhejiang 310000,China)

机构地区：[1]新疆大学地质与矿业工程学院,新疆乌鲁木齐830017 [2]新疆大学新疆中亚造山带大陆动力学与成矿预测自治区重点实验室,新疆乌鲁木齐830017 [3]浙江省隧道工程集团有限公司,浙江杭州310000

出　　处：《新疆大学学报（自然科学版中英文）》2024年第6期712-721,共10页Journal of Xinjiang University(Natural Science Edition in Chinese and English)

基　　金：新疆维吾尔自治区自然科学基金“东准噶尔卡拉麦里晚古生代A型花岗岩对岩石圈拆沉响应”(2021D01C042).

摘　　要：信息量法在矿产预测领域的应用研究已发展成为一种快速、有效的成矿预测方法.选定东准噶尔北塔山地区的阿克塔斯阔腊金矿作为典型矿床,通过深入分析该矿床的地质特征及成矿规律,应用ArcGIS平台完成遥感、区域地球化学等多源信息集成,综合判定断裂构造、火山岩建造、地层、遥感及地化异常等20个金致矿信息.并以金矿点作为有利因子衡量指标,运用信息量模型计算各控矿因素信息量,得到白山包组(S_(2)b)、Au异常区、线性体平均方位(270°~360°)、断裂构造、Sb异常区及遥感叠合度等关键的致矿信息.将各信息量叠加于预测单元内,进行成矿信息量评价及临界值确定,将信息量大于2的区域圈定为A级成矿靶区.通过以上研究,以期为北塔山地区造山型金矿的成矿预测及靶区优选工作提供参考.The applied research of the information method in the field of mineral prediction has developed into a fast and effective method for mineralization prediction.This study focuses on the Beitashan region in east Junggar,selecting the Aketasikuola gold deposit as a representative deposit.Through a thorough analysis of the geological characteristics and mineralization patterns of such deposits,the ArcGIS platform is employed in conjunction with remote sensing,regional geochemistry,and other multi-source information to comprehensively examine 20 gold mineralization factors,including fault structures,volcanic rock construction,stratigraphy,remote sensing hydroxyl iron staining,and geochemical anomalies.Gold ore points were used as favorable indicators,and the information model calculated the information values of various ore-controlling factors.The Baishanbao formation(S2b),Au anomaly zone,linear body average orientation(270°~360°),fault structures,Sb anomaly zone,and remote sensing overlay degree are identified as the primary exploration indicators for gold deposits in the Beitashan region.Overlaying the information values within the prediction units,mineralization information value assessment,and critical value determination were conducted,defining regions with information values greater than 2 as grade A mineralization target zones.Through the aforementioned research,it is aimed to provide a reference for the mineralization prediction and target area selection work of orogenic gold deposits in the Beitashan area.

关 键 词：北塔山 找矿信息 信息量法 成矿预测 

分 类 号：P612[天文地球—矿床学]