广东阳春黑石岗硫铁矿区发现苔藓虫化石

黑石岗硫铁矿区首次发现的苔藓虫呈树枝状，虫室为圆形、椭圆形，呈有规律的定向排列，虫室间有利孔。经有关专家鉴定为窗格苔藓虫群体（８～９ｃｍ）。产于黑石岗花岗闪长岩（γδ）与下石炭统石磴子组大理岩、灰岩接触带的含银铅锌矿溶硐矿石中。其发现说明阳春黑石岗硫铁矿区的下石炭统石磴子组大理岩、灰岩形成于一个海水动荡较弱的浅海（静水海湾、礁体内侧或较深海域）环境。

DISCOVERY OF DRYOZOAN FOSSILS IN HEISHIGANG PYRITE DEPOSIT IN YANGCHUN,GUANGDONG

Abstract Btyozoan fossils are discovered for the first time as dindritic, with directedlylined, circular or elliptical zooecia with acanthopote between them.According to the experts concerned, they can be identical to an aseregstion of Fenestella. Their occurrences within the Ag, Zn and pb-bearing karst ores at thecontact of Heishigang granite with marble and limestone of Lower Carboniferous Shidengzi menber provide strong evidence of less rough, shallos conditions such as septic gulf,inner side of a reel or its deep zone, uners which the Shidengzi carbonaterocks deposited.