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一、前言 苏浙皖地区上石炭统黄龙组下部,普遍存在一套白云岩地层。这段地层是长江中下游地区铁、铜等矿床的主要控矿层位之一,引起各有关部门的重视。对于该段地层的归属,有不少的争议。近年来,在某些地区本段地层中陆续采集到筛(竹蜓)类、珊瑚化石,提供了一些古生物依据。但在牙形刺研究方面所做工作较少。最近,我室为解决该白云岩的时代归属,组成专题研究组,在苏浙皖地区做了大量工作,系统地采集了牙形刺样品,交给笔者分析鉴定,试图通过牙形刺的研究,对该段地层的归属提供一些粗浅的意见。
I. Preface The lower part of the Upper Carboniferous Huanglong Formation in Jiangsu, Zhejiang and Anhui provinces generally contains a set of dolomite strata. This section of the strata is one of the major ore-controlling layers of the iron and copper deposits in the middle and lower reaches of the Yangtze River, arousing the attention of all relevant departments. There is much controversy over the ownership of this section of strata. In recent years, in some areas of this section of the strata have been collected sieve (bamboo and dragonfly), coral fossils, provides some paleontological basis. But less work has been done on conodont research. Recently, our lab made up a special research group to solve the problem of the dolomite era, made a great deal of work in Jiangsu, Zhejiang and Anhui Provinces, and systematically collected conodont samples to author for analysis and identification, attempting to study conodont , Provide some superficial opinions on the ownership of this section of strata.