| 云南金平地区Au、Cu、Pb、Zn、Ag成矿元素时空分布特征及找矿预测 |
| Received:May 10, 2023 Revised:November 01, 2023 点此下载全文 |
| 引用本文：龙天祥.云南金平地区Au、Cu、Pb、Zn、Ag成矿元素时空分布特征及找矿预测[J].Geology and Exploration,2024,60(2):222-235 |
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| 基金项目:中国地质调查局项目（编号：121201010000150007-21）资助 |
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| 中文摘要:云南金平地区是哀牢山南段重要的Au、Cu多金属矿集区，而Au、Cu为该区主成矿元素的论断和依据缺乏，Au、Cu等成矿元素时空富集配分规律、约束机制尚无论断，该区找矿方向及靶区需进一步明确。本文通过开展1:5万金平县幅水系沉积物测量工作，统计分析全区及各主要地质单元元素含量平均值（X）和相对富集系数（K）等，结合金平地区的地球化学参数特征和元素间组合关系、元素异常与成矿相关性，确定了 Au、Cu、Pb、Zn、Ag为金平地区主成矿元素。通过分析元素地球化学时空分布富集规律，可知金平地区元素地球化学富集配分受时间、空间限制，该地区Au、Cu、Pb、Zn、Ag主成矿元素富集峰期为两个阶段（300～400 Ma、470～485 Ma），进而确定了奥陶系、志留系、泥盆系、石炭系、二叠系为该地区最具找矿潜力的时代及地层。通过系统研究元素异常与构造、岩浆和成矿的关系，发现区内三家河断裂、马过河断裂、甜竹山断裂对元素富集有明显的影响和控制作用，金平地区元素异常与成矿具有密切相关性。结合金平地区成矿规律和控矿因素等，圈定了12处综合异常,划定了2个找矿预测区，对2个找矿预测区进行找矿潜力分析，指明了找矿方向，提出了进一步工作建议。 |
| 中文关键词:水系沉积物测量 地球化学特征 成矿元素 找矿潜力 金平地区 云南省 |
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| Spatial and temporal distribution of ore-forming elements Au, Cu, Pb, Zn and Ag and their exploration prediction in the Jinping area, Yunnan Province |
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| Abstract:The Jinping area in Yunnan Province is a very important Au and Cu polymetallic ore concentration area in the southern section of the Ailaoshan Mountains. There is no consensus on the spatiotemporal enrichment and distribution patterns, constraint mechanisms of Au, Cu and other ore-forming elements in this area, and the basis for Au and Cu being the main ore-forming elements is also lacking in this area. Therefore, the prospecting direction and target areas in this area need to be further clarified. This work conducted a 1:50000 survey of water system sediments in Jinping County, and statistically analyzed the average element content (X) and relative enrichment coefficient (K) of the entire area and major geological units. Based on the geochemical parameter characteristics, element association relationships, element anomalies, and mineralization correlations of the Jinping area, it is determined that Au, Cu, Pb, Zn, and Ag are the main ore-forming elements in the Jinping area. By analyzing the spatiotemporal distribution and enrichment patterns of element geochemistry, it is known that the enrichment and distribution of element geochemistry in the Jinping area are limited by time and space. The peak periods of the enrichment of the main ore-forming elements Au, Cu, Pb, Zn, and Ag in this area are two stages (300~400 Ma and 470~485 Ma), and the Ordovician, Silurian, Devonian, Carboniferous, and Permian systems are determined to be the most promising era and strata for ore exploration in this area. The relationship between element anomalies and structures, magma, and mineralization suggests that the Sanjiahe fault, Maguohe fault, and Tianzhushan fault in the area have a significant impact and control on element enrichment. The element anomalies in the Jinping area are closely related to mineralization. Based on the ore-forming laws and ore-controlling factors in the Jinping area, 12 comprehensive anomalies and two prospecting prediction areas have been delineated. Prospecting potential analysis has been conducted on the two prospecting prediction areas, indicating the direction of prospecting and proposing further work suggestions. |
| keywords:stream sediment survey, geochemical characteristics, ore-forming elements, prospecting potential, Jinping area, Yunnan Province |
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