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四川省白玉县呷村银多金属矿床是我国著名的VMS矿床之一,具有容矿火山岩系+硫化物矿体+喷气岩的“三位一体”特征,以及下部筒状或漏斗状网脉状矿(西矿带)和上部层状块状矿(东矿带)的“双层结构”样式。其南部有热矿区找矿虽有进展,但突破不大。为确定有热矿区的找矿方向,本文对呷村矿床和有热矿区含矿带进行了精细结构对比,认为有热北部19~31线由块状硅化流纹质火山岩+条纹条带状流纹质凝灰岩+千枚状绢云母凝灰岩组成火山喷发单元,以强烈的硅化为特征,发育大量的脉状-网脉状构造,与呷村西矿带完全可以对比;而有热南部39~55线则由块状“黄矿”矿石与流纹质火山碎屑岩组成喷气-火山单元,但缺乏重晶石、硅质岩等喷气沉积岩;以“黄矿”为主,仅形成铅锌贫矿体,与呷村矿床东矿带富含重晶石、以“黑矿”为主,形成银铜铅锌富矿体的特征有较大区别。同时,有热块状矿体上部还存在厚达70~130 m的流纹质火山岩和脉状-网脉状矿体,据此认为有热矿带总体上可与呷村西矿带对比,代表热液喷流成矿系统的热水补给通道相,其中的块状(黄矿)矿体具微“双层”结构特征,有可能为早期热流成矿系统的另一个独立的“微”VMS矿床。由此判断有热矿区东部流纹质火山岩与碳质板岩的转换界面处深部存在类似呷村东矿带的以“黑矿”块状矿体+重晶石组合为代表的隐伏矿体,从而共同组成一个“下黄上黑”共两层块状矿体的“堆垛式”结构型式。寻找以“黑矿”-重晶石组合为代表的隐伏银铜铅锌块状矿体是有热矿区今后取得找矿重大突破的关键所在。
Baiyu County, Sichuan Province Qiongcun silver polymetallic deposit is one of the well-known VMS deposits in our country. It has the characteristics of “Trinity” of the volcanic rocks + volcanic rocks + sulfide rocks in ore bodies, and the lower tubular or funnel-shaped veins “Two-story structure” style of the ore (west ore belt) and the upper layered massive ore (east belt). Despite its progress in the prospecting of hot mines in the south, the breakthrough is not large. In order to confirm the ore prospecting direction of the hot mine area, a detailed structural comparison is made between the ore deposits in the 呷cun deposit and the hot mine area. It is concluded that the hot northern 19-31 line is composed of massive silicified rhyolitic volcanic rock + Tertiary tuff + serpentite sericite composed of volcanic eruption units, characterized by strong silicification, the development of a large number of veins - reticulate structure, and Ying Village West belt completely contrast; and hot southern 39 ~ 55 line The jet-volcano units are composed of massive “yellow ore” ore and rhyolitic pyroclastic rocks, but lack of jet sedimentary rocks such as barite and chert; and only “yellow ore” Pb-Zn depleted ore bodies and the ore belt in the east of Qiongcun deposit are rich in barite, with “black ore” as the main component, and the characteristics of forming silver-copper, lead-zinc ore bodies are quite different. At the same time, there are also rhyolite-type volcanic rocks and veins-vein-shaped ore bodies with a thickness of 70-130 m in the upper part of the thermal lump orebodies. Therefore, Hydrothermal jet mineralization system of the hot water supply channel phase, which block (ore) ore with micro “double ” structural features, it is possible for the early heat flux mineralization system of another independent Micro “VMS deposit. From the result, it is concluded that there is a hidden mine in the deep of the conversion interface of rhyolitic volcanic rocks and carbonaceous slate in the east of the hot ore area, which is similar to the ”black ore“ orebody + barite assemblage So as to form a ”stacker “ structure with a total of two layers of massive ore body ”under the yellow on the black.“ Looking for the ”black ore" - barite combination as the representative of the hidden silver-copper-lead-zinc ore body is a hot prospecting area to obtain a major breakthrough in the key.