投稿时间：2023-09-12
修订日期：2024-05-06
网络发布日期：2024-06-26
中文摘要:淘锡坑钨矿床是目前赣南地区可采规模最大的石英脉型黑钨矿矿床，主要由宝山、棋洞、烂埂子和枫林坑矿段组成。近年通过深边勘查，在矿区南东侧东峰矿段又取得了重要找矿突破，新增优质黑钨矿资源量（WO3）超1.4万吨。文章系统对比了淘锡坑各类矿体地质特征，重点对东峰矿段Ⅰ号脉带黑钨矿开展了矿物学研究，结合矿物微区原位微量元素分析，系统总结了石英脉内带型黑钨矿与外带型黑钨矿的地球化学差异。结果显示，内带型黑钨矿具有更低的Zr/Hf、Nb/Ta和LREE/HREE比值，反映其成矿热液演化程度更高，与其更低的成矿温度相对应。东峰矿段黑钨矿由浅至深具有从外带型向内带型过渡的特征，其深部仍具有重要找矿潜力。结合赣南地区石英脉型钨矿发育特征，在“五层楼”模型基础上，笔者提出了适用于石英脉型钨矿深边部找矿的“台阶式”勘查模型，并建立了相应的勘查技术方法及黑钨矿矿物化学标志，为矿床-矿田尺度的钨矿勘查提供了新的理论依据。
Abstract:The Taoxikeng (TXK) tungsten deposit in southern Jiangxi Province, is currently the largest mineable quartz-vein type wolframite deposit in the region. It mainly consists of the Baoshan, Qidong, Langengzi, and Fenglinkeng ore sections. In recent years, based on detailed exploration on the deep and side of the mining area, an important prospecting breakthrough has been made in the Dongfeng ore section at the southeast side of the TXK deposit, with newly increased resources of more than 14,000 tons of high-quality WO3. In this study, we systematically compare the geological characteristics of various orebodies in the TXK deposit, and focus on the mineralogy of the wolframite in the vein zoneⅠ of the Dongfeng section. Combined with in-situ trace element geochemistry of wolframite, we summarize the geochemical differences between the inner zone-type and outer zone-type quartz vein wolframite. The former has lower Zr/Hf, Nb/Ta and LREE/HREE ratios, reflecting higher evolution degree of ore-forming fluids and corresponding to lower metallogenic temperature. The wolframite in Dongfeng section has the characteristics of transition from outer zone-type to inner zone-type wolframite from the shallow to the deep, indicating that it has great prospecting potential in the depth. Accordingly, in combination with the “five-floor” model of quartz vein tungsten deposits in southern Jiangxi Province, we propose a "stepped" exploration model which is suitable for deep and side prospecting of quartz-vein type tungsten deposit, and establish the corresponding exploration techniques and mineral chemical footprints of wolframite, which provides a new theoretical basis for deposit-orefield scale tungsten ore exploration.
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基金项目:本文得到国家自然科学基金地质联合基金重点项目（编号：U2344207）、国家重点研发计划项目（编号：2022YFC2905101）、国家自然科学基金（编号：41973046）、中国地质调查局地质调查项目（编号：DD20190713）联合资助
引用文本：
郭淑庆,赵正,郭聪,李陈浩,刘善宝,刘战庆.2024.淘锡坑石英脉型钨矿床找矿新突破及“台阶式”勘查模型启示[J].矿床地质,43(3):563~577GUO ShuQing,ZHAO Zheng,GUO Cong,LI ChenHao,LIU ShanBao,and LIU ZhanQing.2024.New breakthrough in Taoxikeng quartz-vein type tungsten deposit and implications for the “stepped” exploration model[J].Mineral Deposits43(3):563~577
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