The Application of Various Mineral Prospectivity Modeling in the Exploration of Orogenic Gold Deposit in Saqez-Sardasht Region, Northwest Iran

IF 0.7 4区地球科学 Q4 GEOCHEMISTRY & GEOPHYSICS

Lithology and Mineral Resources Pub Date : 2023-07-07 DOI:10.1134/S002449022370013X

Farzaneh Mami Khalifani, Ali Imamalipour, Samaneh Barak, Maysam Abedi, Golnaz Jozanikohan, Abbas Bahroudi

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引用次数: 1

Abstract

The Saqez-Sardasht region (~2000) is located in the north Sanandaj-Sirjan Zone (SSZ), between longitudes of 46°00′67 00″ E to 46°30′00″ and latitudes of 36°00′00″ N to 36°30′00″, northwest Iran. The region was fully studied to recognize the promising areas for gold deposits using various methods of fuzzy fusion techniques. Accordingly, six evidential layers (i.e., lithological, tectonic, alteration, with Au, Sb, and W geochemical anomalies have been derived from three geo-data sets of geology, geochemistry, and remote sensing. A concentration–number (C–N) fractal method was used to determine the geochemical threshold values. The outcome was then combined, using the multiple indicator kriging (MIK) geochemical methods to improve the mineral potential mapping of gold deposits. In this study, four various fuzzy mineral prospectivity mapping (MPM) methods consisting of conventional VIKOR, modified VIKOR, multi-class index overlay, and Geo Fuzzy Inference System (GeoFIS) have been employed to detect the most promising areas in the Saqez-Sardasht region. The MPMs were numerically compared to each other based on the MPM efficiency index for the seven gold prospects in the study region. The Geo Fuzzy Inference System (GeoFIS) acquired 91.84% agreement, so it is selected as the superior technique to lead the prospect selection. With affiliation to the outcome of MPM maps, promising mineralized areas, controlled by shear zones, were located in the southwestern part of the Saqez region.

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各种找矿模型在伊朗西北部萨盖兹-萨尔达什特地区造山带金矿找矿中的应用

Saqez-Sardasht地区(~2000)位于伊朗西北部的Sanandaj-Sirjan地区(SSZ)北部，东经46°00′6700″至46°30′00″，北纬36°00′00″至36°30′00″之间。利用各种模糊融合技术对该区域进行了充分研究，以识别金矿远景区。据此，利用地质、地球化学、遥感等3套地质资料，获得了含Au、Sb、W地球化学异常的岩性、构造、蚀变等6个证据层。采用浓度-数(C-N)分形法确定了地球化学阈值。利用多指标克里金(MIK)地球化学方法对结果进行综合，改进了金矿床的矿产潜力填图。本文采用传统的VIKOR、改进的VIKOR、多级指数叠加和地理模糊推理系统(GeoFIS)四种不同的模糊矿产找矿方法对Saqez-Sardasht地区最有希望的区域进行了探测。根据成矿效率指数对研究区7个金矿找矿区进行了数值比较。地质模糊推理系统(GeoFIS)的一致性为91.84%，被认为是引导远景选择的优势技术。根据MPM图的结果，受剪切带控制的有希望的矿化区位于Saqez地区的西南部。

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来源期刊

Lithology and Mineral Resources 地学-地球化学与地球物理

CiteScore

1.30

自引率

37.50%

发文量

审稿时长

>12 weeks

期刊介绍： Lithology and Mineral Resources is an international peer reviewed journal that publishes articles on a wide range of problems related to the formation of sedimentary rocks and ores. Special attention is given to comparison of ancient sedimentary rock and ore formation with present-day processes. The major part of the journal is devoted to comparative analysis of sedimentary processes on the continents and in oceans, as well as the genetic aspects of the formation of sedimentary and hydrothermal–sedimentary mineral resources. The journal welcomes manuscripts from all countries in the English or Russian language.