小秦岭金矿田典型矿脉矿化趋势面分析与深部预测

谭满堂; 姚书振; 丁振举; 周宗桂; 何谋春

doi:10.3799/dqkx.2014.029

小秦岭金矿田典型矿脉矿化趋势面分析与深部预测

doi: 10.3799/dqkx.2014.029

中国地质大学资源学院, 湖北武汉 430074

基金项目:

全国危机矿山接替资源找矿项目 20089939

详细信息

作者简介:
谭满堂(1975-), 男, 工程师, 博士研究生, 主要从事矿床学、矿田构造学研究.E-mail: tanmant@163.com

通讯作者:
姚书振, E-mail: szyao@cug.edu.cn

中图分类号: P617
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出版历程
- 收稿日期: 2013-06-19
- 刊出日期: 2014-03-15

Trend Surface Analysis of Main Ore Veins with Applications in Mineral Resources Prediction in Xiaoqinling Gold Ore Field

Faculty of Earth Resources, China University of Geosciences, Wuhan 430074, China

摘要

摘要: 小秦岭石英脉型金矿田是我国重要的金矿富集区, 区内一些重要矿山已逐渐成为危机矿山, 深部找矿是当务之急.运用趋势面分析法对3个典型东西向南倾矿脉的矿体厚度及品位进行处理, 分析了断裂构造控矿特征及矿化富集规律.结果表明: 东西向矿脉主要向南西侧伏; 控矿断裂具有由南西向北东斜上左行逆冲的活动性质; 多阶段矿化具有"Ⅰ阶段成脉、Ⅱ阶段金矿化、Ⅲ阶段金铅叠加"的过程; 由矿体侧伏与断裂产状波状起伏联合控制的近平行等间距展布的2组结构线的交汇部位是矿化富集地段; 据此指出了各矿脉深部找矿预测的主要方向.
- 趋势面分析 /
- 深部预测 /
- 石英脉型金矿 /
- 矿床 /
- 断裂 /
- 小秦岭
Abstract: It is urgent for us to undertake deep prospecting in Xiaoqinling quartz vein type gold ore field, an important gold enrichment area in China where many famous mines are becoming crisis mines gradually. Trend surface analysis of ore veins can intuitively reflect regional and local trends of geological variables, which can be used for studying ore-controlling structure features and guiding deep prospecting. By the trend surface analysis on ore body thickness, Au and Pb grades of three typical ore veins, this paper presents the following mineralization enrichment rules and fault ore-controlling features found in the study. The main ore veins strike EW and are pitched to southwest. Ore-controlling fault thrusts from SW to NE obliquely with leftward contortion. Multistage mineralization is featured with three stages in which veins formed primarily in the first stage, Au mineralized strongly in the second stage and Au-Pb mineralization superposed in the third stage. Controlled jointly by orebody plunging direction and fault wavelike occurrence, the intersectional parts of two structure lines distributed proximal parallel and equidistantly are advantageous mineralization enrichment areas, which are the promising for future deep prospecting in these ore veins.
- trend surface analysis /
- deep prospecting /
- quartz vein type gold deposit /
- ore deposits /
- fracture /
- Xiaoqinling

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图 1 小秦岭金矿田构造纲要及主要矿脉分布略图(据颜正信等(2007)修编)

1.中生代黑云母二长花岗岩；2.下元古代角闪石二长花岗岩；3.背斜轴；4.向斜轴；5.典型矿床；6.典型矿脉及编号；7.金矿带；8.太华群

Fig. 1. Tectonic outline and main ore-vein distribution map of Xiaoqinling gold ore field

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图 2 东闯金矿2号勘探线剖面简图

1.条纹条痕状角闪斜长片麻岩；2.斜长角闪片麻岩；3.辉绿岩脉；4.石英脉、糜棱岩带；5.金铅矿体；6.探槽及编号；7.老硐及编号；8.钻孔及编号；9.沿脉平硐及编号

Fig. 2. No.2 exploratory profiles sketch of Dongchuang gold deposit

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图 3 典型矿脉3个阶段矿化叠加特征

a.杨砦峪金矿980 m中段S60脉；b.东桐峪金矿600 m中段Q10脉

Fig. 3. Triple mineralizational stacking characterstics of typical veins

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图 4 东闯金矿S507脉矿体厚度、Au(Pb)品位等值线图、三次趋势图及剩余值等值线图

a.矿体厚度等值线; b.矿体厚度三次趋势值; c.矿体厚度三次趋势剩余值; d.金品位等值线﹔e.金品位三次趋势值，f.金品位三次趋势剩余值﹔g.铅品位等值线: h.铅品位三次趋势值: i.铅品位三次趋势剩余值

Fig. 4. Isoline, cubic trend values and residual values chart of orebody thickness, gold and lead grades of No.507 vein in Dongchuang gold deposit

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图 5 杨砦峪金矿S60脉矿体厚度、Au品位等值线图、三次趋势图及剩余值等值线图

a.矿体厚度等值线；b.矿体厚度三次趋势值；c.矿体厚度三次趋势剩余值；d.金品位等值线；e.金品位三次趋势值；f.金品位三次趋势剩余值

Fig. 5. Isoline, cubic trend values and residual values chart of orebody thickness, gold and lead grades of No.S60 vein in Yangzhaiyu gold deposit

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图 6 东桐峪金矿Q8脉矿体厚度、Au品位等值线图、三次趋势图及剩余值等值线图

a.矿体厚度等值线；b.矿体厚度三次趋势值；c.矿体厚度三次趋势剩余值；d.金品位等值线；e.金品位三次趋势值；f.金品位三次趋势剩余值

Fig. 6. Isoline, cubic trend values and residual values chart of orebody thickness, gold and lead grades of No.Q8 vein in Dongtongyu gold deposit

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