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多金属矿床中的伴生银,是银矿床重要成因类型之一。浙江五部铅锌矿床中的伴生银,虽品位低,变化大,但分布较普遍。作者在对该矿床成矿规律的研究中,发现银在矿床中的分布有一定规律。本文拟着重对北矿段一、四号矿体中银的分布规律作一初步探讨。一、矿床地质概况矿床赋存于晚侏罗世至早白垩世之“火山断陷盆地”边缘断裂破碎带部位。盆地历经长期火山活动的喷发和堆积,形成了一套以酸性火山碎屑岩为主体的火山碎屑沉积岩、中一基性熔岩以及较晚期的酸性次火山岩,组成多旋回结构的“断陷火山建造”。矿床与多旋回火
Associated silver in polymetallic deposits is one of the important genetic types of silver deposits. Associated silver in the five lead-zinc deposits in Zhejiang Province, although of low grade and large variation, is more commonly distributed. In the study of the metallogenic regularity of the deposit, the author found that the distribution of silver in the deposit has certain rules. This article will focus on the distribution of silver in the ore body of No. 1 and No. 4 mine in North Mine. First, the geological prospecting Deposits occur in the Late Jurassic to Early Cretaceous “volcanic faulted basin” edge fault fracture zone. After long-term volcanic eruptions and depositions, the basin has formed a set of volcaniclastic sedimentary rocks, intermediate-basic lavas and later acidic acidic volcanic rocks that are mainly composed of acidic pyroclastic rocks and are composed of multi-cycle volcanoes put up". Deposits and multi-turn back the fire