南秦岭竹山县土地岭火山岩型钽铌矿综合找矿方法及找矿模型

doi:10.11720/wtyht.2020.1391

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摘要

土地岭钽铌矿是湖北省地质调查院近期在南秦岭地区发现的具有大型规模的钽铌矿床。通过介绍该矿床勘查过程中使用的方法,提出了适合于火山岩型“稀有”矿的综合找矿方法,即1:5万水系沉积物测量发现靶区、以大比例尺岩石剖面测量圈出矿化带、以火山岩岩相及岩石组合特征的填图方法厘定含矿地质体、以槽探工程控制地表矿体、以钻探工程验证深部矿体。实践证明,该找矿方法组合具有经济、快捷、找矿效果显著等特点。通过各种找矿方法的分析研究,建立了找矿模型,对国内火山岩型钽铌找矿具有重要意义。

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关键词 ：火山岩型, 钽铌矿, 综合找矿方法, 找矿模型

Abstract：

The Tudiling large-sized Ta-Nb deposit was recently discovered in the South Qinling orogenic belt by the Hubei Geological Survey Institute. This paper introduces the methods used during the exploration process, and proposes a comprehensive prospecting method suitable for volcanic type "rare" deposits, that is, to find the target area by 1:50,000 stream sediment survey, to delineate the mineralized zone by large-scale rock profiling, to identify the ore-bearing geological bodies by mapping of volcanic lithofacies and rock combination characteristics, to constrain the surface orebodies by trenching engineering, and to verify the deep orebodies by drilling. Practice has proved that the combination of prospecting methods is economical, fast, and effective. Based on the analysis of various prospecting methods, a prospecting model is established, which is of great significance for prospecting of volcanic Ta-Nb deposits in China.

Key words： volcanic type Nb-Ta deposit integrated ore-prospecting method ore-prospecting model

收稿日期: 2019-08-12 出版日期: 2020-10-26

P632

基金资助:湖北省地质勘查基金管理中心项目“湖北省竹山县土地岭矿区钽矿预查”(〔2018〕19);“湖北省竹山—竹溪地区铌金矿调查评价”(〔2015〕23);中国地质调查局武汉地质调查中心基础性公益性地质调查项目“湖北竹山文峪—擂鼓地区1:5万矿产地质调查”(DD20160030-07)

作者简介: 黄景孟(1984-),男,高级工程师,资源勘查工程专业,从事矿产地质调查及地质找矿工作。Email: hjm822@qq.com

引用本文:

黄景孟, 熊意林, 张笑, 鲁显松, 周豹, 汪国虎. 南秦岭竹山县土地岭火山岩型钽铌矿综合找矿方法及找矿模型[J]. 物探与化探, 2020, 44(5): 1135-1143.
HUANG Jing-Meng, XIONG Yi-Lin, ZHANG Xiao, LU Xian-Song, ZHOU Bao, WANG Guo-Hu. An integrated ore-prospecting method and model for volcanic Ta-Nb deposits in Tudiling,Zhushan County, south Qinling orogenic belt. Geophysical and Geochemical Exploration, 2020, 44(5): 1135-1143.

链接本文:

https://www.wutanyuhuatan.com/CN/10.11720/wtyht.2020.1391 或 https://www.wutanyuhuatan.com/CN/Y2020/V44/I5/1135

Fig.1 研究区大地构造位置(a,据文献[10]修改)和碱性岩带分布(b)
1—新元古界;2—古生界;3—基性岩;4—碳酸岩、正长岩杂岩体;5—粗面质火山岩、正长岩;6—研究区位置;F₁—鲁山断裂;F₂—商丹断裂;F₃—青峰-襄广断裂;F₄—红椿坝-曾家坝断裂;F₅—安康-竹山断裂

Fig.2 土地岭地区1:5万水系沉积物测量异常剖析
a—研究区地质图;b—Nb异常分布;c—Ce异常分布;d—La异常分布;1—全新统;2—梅子垭组一段;3—竹山组;4—耀岭河组;5—辉绿岩;6—正长斑岩;7—粗面岩;8—含砾粗面质晶屑凝灰岩;9—粗面质熔结凝灰岩;10—凝灰质娟云千枚岩;11—钽铌矿体及编号;12—铌矿体及编号;13—断层;14—异常内带;15—异常中带;16—异常外带;17—Nb-La-Ce组合异常带

Fig.3 土地岭地区岩石剖面测量平剖图
1—岩石剖面及刻度(黄色区域代表铌异常,蓝色曲线代表钽异常);2—钽铌矿体及编号;3—铌矿体及编号(少数含钽矿化);4—地质界线;5—性质不明断层及逆断层;6—铌钽异常带;其他图例同图2

Fig.4 土地岭矿区矿体地质及工程分布
1—钽铌矿体及编号;2—铌矿体及编号(少数含钽矿化);3—性质不明断层及逆断层;4—地质界线及产状;5—钽铌异常带;6—萤石化;7—碳酸盐化;8—绢云母化;9—勘探线剖面及编号;10—钻孔位置及编号;11—槽探工程位置及编号;其他图例同图2

Fig.5 0#勘探线剖面测量结果及地质综合剖面

Table 1 土地岭钽铌矿区矿体地质特征

Table 2 土地岭钽铌矿区多元信息综合找矿模型

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