| 胡儒权,魏宇,张庆松,王维华,贺勇刚,唐小容.四川美姑南红玛瑙矿勘查类型与合理勘查工程间距研究——以瓦西、九口矿床勘查为例[J].地质找矿论丛,2025,40(2):167-174 |
| 四川美姑南红玛瑙矿勘查类型与合理勘查工程间距研究——以瓦西、九口矿床勘查为例 |
| Study on prospecting types and grid spacing of Nanhong agate deposits in Meigu County, Sichuan Province——Taking the Waxi and Jiukou deposits as an example |
| 投稿时间：2025-03-13 修订日期：2025-04-16 |
| DOI：10.6053/j.issn.1001-1412.2025.02.004 |
| 中文关键词: 南红玛瑙 评价标准 勘查类型 稀空法 勘查间距 美姑县 |
| 英文关键词:Nanhong agate deposit exploration specifications exploration type sparse space method exploration work spacing Meigu County |
| 基金项目: |
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| 摘要点击次数: 208 |
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| 中文摘要: |
| 四川美姑地区南红玛瑙矿石主要产于上二叠统宣威组的紫红色泥质、砂质砾岩中,其光泽油润,色地鲜艳,深受市场追捧。由于缺少玛瑙矿勘查评价标准,导致美姑玛瑙矿资源潜力不能得到准确评价,勘查开发迟滞。本文以瓦西、九口矿床勘查为例,在分析玛瑙矿与金属砂矿的共性与差异基础上,以现行金属砂矿勘查规范为基础,运用类比法,首先分析影响勘查类型的主要地质因素及其影响大小并划分勘查类型,然后采用稀空法,探讨不同勘查类型的基本勘查工程间距。矿体规模、矿体形态和内部结构、矿体厚度稳定程度、体积含矿率均匀程度确定为影响南红玛瑙勘查类型的4个主要因素;将类型系数之和≥2.4者划为Ⅰ勘查类型,1.8~2.3者划为Ⅱ勘查类型,≤1.7者划为Ⅲ勘查类型;推荐Ⅰ勘查类型基本勘查工程间距为120 m~200 m×50 m~80 m,Ⅱ勘查类型基本勘查工程间距为80 m~120 m×30 m~50 m,Ⅲ勘查类型基本勘查工程间距为40 m~80 m×20 m~30 m。研究结果为美姑地区玛瑙矿的勘查评价提供了可循依据,对促进玛瑙资源优势转换为经济优势具有重要意义。 |
| 英文摘要: |
| Nanhong agate deposits occurs mainly in the purple-red muddy and sandy conglomerate of the Xuanwei Formation with oil luster and bright colors. The agate is highly demanded in the market. Due to lack of exploration specifications the resource potential cannot be accurately evaluated and the exploration and development delayed. This paper takes the exploration of Waxi and Jiukou agate deposits as an example to analyze commonality and difference between exploration of agate deposits and metal placers. Based on the current placer exploration specification,correlation method is used to analyze the main geological factors affecting the exploration type and the influence degrees,to classify the exploration types. Then the sparse space method is used to discuss different exploration types’ basic exploration work space. There are four main geological factors affecting the exploration type of the agate deposit, i.e. size of the ore body, morphology and internal structure of the ore body, the stability of the thickness and the uniform distribution of volumetric ore content. If the sum of the type coefficients ≥2.4, it is classified as type I; the sum of the type coefficients between 1.8 and 2.3, type Ⅱ; and the sum of the type coefficients ≤1.7, type Ⅲ. It is recommended that 120 m~200 m×50 m~80 m spacing is for type I, 80 m~120 m×30 m~50 m for type Ⅱ, 40 m~80 m×20 m~30 m for type Ⅲ. The mentioned above provides a basis for the exploration and evaluation of the agate deposit and is of great significance to promote the conversion of agate resource advantages into economic advantages. |
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