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广西自治区钦州县板城一带有一套颇为特殊的深灰色、灰绿色薄层状硅质岩夹硅质页岩,出露面积约30 000km~2,呈北东—南西向长条形分布,厚数百米,几乎不含大化石,前人一般仅据岩性特征将之归入上泥盆统榴江组或下二叠统孤峰组。该区最近10年内无人再工作过,至今最新资料便是1974年的1:20O 000小董幅区调,当时曾有人据薄片观察怀疑是海底喷发熔岩,但因缺少证据而未有定论。此后关于这套硅质岩系的成因及时代问题,一直无新进展,其中含有放射虫化石,更无人发现、研究。1988年初,笔者在进行广西石炭纪沉积相
There is a rather special set of silvery shale with dark gray, gray-green thin-layer siliceous rock in the vicinity of Bancheng, Qinzhou County, Guangxi Autonomous Region. The exposed area is about 30 000 km -2, showing a northeast-south-west strip distribution. Hundreds of meters thick, almost no large fossils, the previous general only according to lithological characteristics will be classified as Upper Devonian Group or the Lower Jurassic Cretaceous. No work has been done in the area for the last 10 years. The most up-to-date information so far is the 1: 20,000,000 dong area adjustment of 1974. At that time, some people suspected of being lacustrine eruptive lava when observed by lamellae, but they were inconclusive because of a lack of evidence. Since then, there has been no new progress on the causes and the times of this set of siliceous rock series, which contains radiolarian fossils, but no one has ever discovered or studied. Early 1988, I was in Guangxi Carboniferous sedimentary facies