黔西北垭都-蟒硐成矿带构造分形结构特征及找矿意义  

Structural Fractal Texture Characteristics and Its Prospecting Significance for the Yadu-Mangdong Metallogenic Belt in NW Guizhou Province

作　　者：崔中良 姚艳领 程金华 罗开 周家喜 CUI Zhongliang;YAO Yanling;CHENG Jinhua;LUO Kai;ZHOU Jiaxi(Guanghua Institute of Gemmology and Mineral Resources,Jiangxi University of Applied Science,Nanchang 330100,China;YCIH First Investigation and Design Co.,Ltd.,Kunming 650000,China;Zhuji Natural Resources and Planning Bureau,Shaoxing 312000,China;School of Earth Sciences,Yunnan University,Kunming 650500,China;Key Laboratory of Critical Minerals Metallogeny in University of Yunnan Province,Kunming 650500,China)

机构地区：[1]江西应用科技学院光华宝石矿物资源学院,南昌330100 [2]云南建投第一勘察设计有限公司,昆明650000 [3]诸暨市自然资源和规划局,绍兴312000 [4]云南大学地球科学学院,昆明650500 [5]云南省高校关键矿产成矿学重点实验室,昆明650500

出　　处：《高校地质学报》2022年第4期592-605,共14页Geological Journal of China Universities

基　　金：国家自然科学基金项目(41872095,U1812402和41430315);云南大学科研启动项目(YJRC4201804);培育项目(2018YDJQ009)联合资助。

摘　　要：利用分形几何学方法精细厘定了黔西北垭都—蟒硐成矿带构造分形结构特征,并结合构造控矿特征及Fry分析圈定有利找矿区,指出研究区铅锌资源进一步找矿方向。结果表明:研究区3.371~26.965 km范围内,断裂构造统计自相似性良好,断裂整体容量维为1.6052,信息维为1.6051;铅锌矿床分布区具有分维值较高和存在相对阻挡—圈闭流体区两个特征,其中小型铅锌矿床发育于容量维大于1.29、信息维大于1.39的分区,中—大型铅锌矿床发育于容量维大于1.58、信息维大于1.42的分区;铅锌矿床及其金属资源量丛集性显著,二者空间分布分维值分别为1.0096和0.9313。本次工作根据分维值、构造控矿特征和Fry分析等,在研究区划分出四级有利成矿区,其中Ⅰ级有利成矿区找矿潜力最大,在空间上呈NW向展布,包括已知找矿突破猪拱塘铅锌矿区。The fractal geometry method is used to finely determine the structural fractal texture characteristics of the YaduMangdong metallogenic belt in NW Guizhou Province. Combined with the structural ore-controlling characteristics and Fry analysis, the favorable ore prospecting area is delineated and the future ore prospecting direction of Pb-Zn resources in the study area is proposed. The results show that the statistical self-similarity of fault structure is good in the range of 3.371 to 26.965 km.The overall capacity dimension of faults is 1.6052 and the information dimension is 1.6051. The distribution of Pb-Zn deposits has two features, that is high fractal dimension and relative blocking-trap fluid area. Small Pb-Zn deposits are developed in the area that has capacity dimension greater than 1.29 and information dimension greater than 1.39, and medium-large Pb-Zn deposits are developed in area that has capacity dimension greater than 1.58 and information dimension greater than 1.42. The Pb-Zn deposits and their metal resources are significantly clustered and the fractal dimensions of spatial distributions are 1.0096and 0.9313, respectively. According to the fractal dimension, structural ore-controlling characteristics and Fry analysis, the study area can be divided into four favorable metallogenic grades, of which grade I region has the highest ore prospecting potential. Such a region shows a spatially NW-trending distribution, including the newly discovered Zhugongtang Pb-Zn deposit.

关 键 词：分形结构特征 断裂构造分维值 Fry分析 构造组合样式 找矿方向 黔西北垭都—蟒硐成矿带 

分 类 号：P542.3[天文地球—构造地质学] P618.4[天文地球—地质学]