一、矿区地质概况分布于老王寨金矿床周围的地层是一套浅变质的板岩、石英杂砂岩夹碳酸盐岩、熔结角砾岩和层凝灰岩海相火山碎屑岩系,属扬子地台边缘凹陷带的类复理石沉积,具有浊流沉积的特征,矿区内划分五个岩性段,过去因缺乏化石依据而统称为上古生界或下、中志留统。笔者在第一岩性段中部采获大量的牙形石,经董致中鉴定可划分两个化石带,时代 I. Geological Survey of Mining Area The strata distributed around the Laowangzhai gold deposit are a series of metamorphic slate, quartz sandstone sandstone with carbonate rocks, sinter breccias and tuff marine volcanic clastic rocks, There are five lithologic segments in the mining area. In the past, because of the lack of fossils, they were collectively called the Paleozoic or the Lower and Middle Silurian. The author collected a large amount of conodont in the middle of the first lithologic section. After identification by Dong Zhizhong, it can be divided into two fossil zones,