冀东Cu元素化探异常信息提取与找矿潜力分析  

Extraction of Anomalous Information from Geochemical Exploration of Cu Elements and Analysis of Prospecting Potential in Eastern Hebei

作　　者：焦雪红 韩美伶 王晓东[2] 邢欢[3] 李紫烨[4] 刘剑波[2] 李宾 孙志伟 张粉霞 韩玉丑 张海亮 JIAO Xue-hong;HAN Mei-ling;WANG Xiao-dong;XING Huan;LI Zi-ye;LIU Jian-bo;LI Bin;SUN Zhi-wei;ZHANG Fen-xia;HAN Yu-chou;ZHANG Hai-liang(Hebei GEO University,Shijiazhuang 050031,China;The Fourth Geological Team of Hebei Bureau of Geology and Mineral Resources Exploration,Chengde 067000,China;Hebei Bureau of Geology and Mineral Resources Exploration,Shijazhuang 050070,China;The Sixth Geological Team of Hebei Bureau of Geology and Mineral Resources Exploration,Shijiazhuang 050070,China;Hebei geological survey institute,ShiJiazhuang 050081,China;Geology and Ore Research Center of Hebei province,Shijazhuang 050011,China;Hebei Hydrologic EngineeringGeological Survey Institute,Shijazhuang 050021,China)

机构地区：[1]河北地质大学地球科学学院,河北石家庄050031 [2]河北省地矿局第四地质大队,河北承德067000 [3]河北省地矿局,河北石家庄050070 [4]河北省地矿局第六地质大队,河北石家庄050070 [5]河北省地质调查院,河北石家庄050081 [6]河北省地矿研究中心,河北石家庄050011 [7]河北省水文工程地质勘查院,河北石家庄050021

出　　处：《河北地质大学学报》2024年第3期7-12,19,共7页Journal of Hebei Geo University

基　　金：河北省自然资源厅基金项目(13000023P00F2D410352E,13000023P00F2D410354M)。

摘　　要：冀东地区是河北省重要的铜钼多金属成矿带。1∶20万化探异常圈定结果显示,Cu元素异常呈近东西向零散分布,与已知矿床(点)吻合程度较低。为有效提取矿化异常、分析影响异常分布控制因素,文章采用多重分形S-A异常分解和局部奇异性法数据处理方法对化探数据进行了分析。S-A法化探异常分解结果显示Cu元素背景场亦呈近东西向展布,分解的Cu元素异常场与铜矿(化)点吻合程度显著提高,且圈出部分新的成矿有利区域。为识别和提取弱异常,进一步采用局部奇异性法对数据进行了处理,提取结果与S-A法分解异常场相比,背斜核部异常明显减弱,在北翼碳酸盐岩地层分布区圈出多处成矿有利区,结合区域构造演化和成矿地质条件分析,马兰峪背斜核部深部找矿潜力受限,北翼应为寻找斑岩型—矽卡岩型铜多金属找矿重点区域。The eastern area is an important copper-molybdenum polymetallic metallogenic belt in Hebei Province.The delineation results of 1:200000 geochemical anomaly show that the Cu element anomaly is scattered in nearly east-west direction,and the degree of coincidence with ore deposits is poor.In order to extract mineralized anomalies,effectively analyze the controlling factors of anomaly distribution,this paper uses multifractal S-A anomaly decomposition and local singularity method to analyze geochemical exploration data.Analysis shows that the spatial distribution of Cu is controlled by the distribution of metamorphic rocks.In order to eliminate the interference of regional factors,the S-A method is used to decompose the geochemical exploration data.The results show that the background field of Cu element is also distributed in an east-west direction,which further proves that the spatial distribution of Cu element is controlled by metamorphic rocks in the uplift area.The coincidence degree between the decomposed Cu anomaly field and the copper mineralization point is significantly improved,and some new favorable metallogenic areas are ringed.In order to identify and extract weak anomalies,the local singularity method is used to process the data.The results of SA analysis show that the anticlinal core anomaly weakened significantly,and several favorable ore-forming areas were ringed in the carbonate strata of the northern flank.Combined with the analysis of regional tectonic evolution and metallogenic geological conditions,the deep ore-prospecting potential of Malanyu anticlinal core was limited,and the northern flank should be the key area to search forporphyry-skarn copper polymetal.

关 键 词：化探 多重分形S-A 局部奇异性 冀东 

分 类 号：P632.3[天文地球—地质矿产勘探]