| 李成厚,刘孜,杨献珍,胡加昆,龙圣,赵亮,李相材,祝新友,吕晓强.云南兰坪金顶铅锌矿床矿体地质特征及找矿标志[J].矿产勘查,2021,12(4):953-963 |
| 云南兰坪金顶铅锌矿床矿体地质特征及找矿标志 |
| Geological characteristics and prospecting criteria of the Jinding lead–zinc deposit in Lanping, Yunnan Province |
| 投稿时间：2021-01-14 |
| DOI： |
| 中文关键词: 铅锌矿 矿体类型 找矿标志 金顶 兰坪中图分类号: P 文献标识码: A 文章编号: 1674-7801(2021)04-0953-11 |
| 英文关键词: lead-zinc deposit orebody type prospecting criteria Jingding Lanping |
| 基金项目:中国铜业有限公司重点科技计划项目(编号:[2019]048号)资助。 |
|
| 摘要点击次数: 1886 |
| 全文下载次数: 635 |
| 中文摘要: |
| 金顶铅锌矿作为我国第二大铅锌矿，其赋矿围岩制约着矿体类型和找矿方向，实现找矿突破需建立对应的找矿标志。本文基于大比例尺地质填图、钻孔及坑道编录等工作，确定各类型矿化特征，厘定矿体类型，建立区域找矿预测标志，支撑矿区地质勘查工作。研究表明，矿区矿体可以分为砂岩型矿体和角砾岩型矿体两类，二者属同一时期、同一盆地卤水在不同建造单元中聚集、沉淀成矿的结果。勐野井组含矿砂岩、层状含矿含角砾砂岩属于砂岩型矿体，含矿坍塌角砾岩、液化砂岩属于角砾岩型矿体。砂岩型矿体集中分布在北厂矿段 F4与 F17断裂之间、峰子山矿段 F4断裂以西一带，主要表现为矿体连续、稳定、延深大等特点。角砾岩型矿体主要分布在北厂矿段 F17断裂以东—架崖山矿段一带，整体沿角砾岩带呈北东向展布，矿体表现为变化大、不连续、不稳定等特点。坍塌角砾岩、褪色蚀变、横向断裂为金顶地区寻找角砾岩型、砂岩型铅锌矿体的重要标志，尤其是褪色蚀变耦合横向断裂区间为形成厚大砂岩型矿体的有利地段。 |
| 英文摘要: |
| The Jinding lead-zinc deposit is the second largest lead–zinc deposit in China. Its host rock restricts the type of orebody and the direction of ore prospecting. To achieve a breakthrough in ore prospecting, it is necessary to establish corresponding prospecting criteria. Based on the large-scale geological mapping, drilling and tunnel logging, this paper pointed out the characteristics of various types of mineralization, further determined the type of orebody, established regional prospecting prediction indicators, and supported the geological exploration of the mining area. The orebodies in the mining area can be divided into sandstone type and breccia type, which are the results of the accumulation and precipitation of the same basinal brine in di.erent formation units during the same period. Speci.cally, ore-bearing sandstone and layered ore-bearing breccia sandstone of the Mengyejing Formation are classi.ed as sandstone type orebodies, while ore-bearing collapse breccia and lique.ed sandstone are classi.ed as breccia type orebodies. Sandstone type orebodies are mainly distributed between F4 fault and F17 fault in Beichang segment and to the west of F4 fault in Fengzishan segment, which are characterized by continuity, stability and large extension. The breccia type orebodies are mainly distributed in the east of F17 fault in Beichang -Jiayashan segments, and are distributed along the NE-directed of breccia belt, showing the characteristics of great change, discontinuity and instability. Collapse breccia, fading alteration and transverse fault are important marks for searching for breccia type and sandstone type lead-zinc ore bodies in the Jinding area, especially the fading alteration coupling with transverse fault zone is favorable for forming thick sandstone type orebodies. |
|
查看全文
查看/发表评论 下载PDF阅读器 |
| 关闭 |
|
|
|