摘要
根据研究清河镇化石群提供的信息,在内蒙古商都五道湾地区白云鄂博群阿牙登组下部首次发现梅树村阶小壳动物化石,内含软舌螺类、似软舌螺类、齿形壳类、棱管壳类、卡门壳类等8属8种(含1相似种,2未定种)及大量海绵骨针,共计2000余件。确定白云鄂博群的地质时代为震旦纪—寒武(奥陶)纪。再次证明了清河镇化石群的存在;验证了氢氟酸法是提取浅变质碳酸盐岩中化石的有效方法;并提出加里东褶皱带的新设想。
Based on the information of the Qinghezhen fauna, small shelly fossils of the Meishucun Stage were first discorered in the Lower Ayadeng Formation of the Bayan Obo Group, in Wu-daowan village, Shangdu, Inner Mongolia, which contain 8 gen. 8 sp. (including 1 cf. , 2 undefined sp. ), such as Hyolitha, Hyolithellus, Conodonomorpha, Siphogonuchitiida, Camenida and more than 2000 pieces of sponge spicule fossils. Thus, the age of the Bayan Obo Group is determined to be Sinian-Cambrian (to Ordovician). The discovery of small shelly fossils proves the existence of the Qinghezhen fossil group once again and testfies that the HF acid method is effective to extract fossils from low-grade metamorphic carbonate rocks.
出处
《地质论评》
CAS
CSCD
北大核心
2000年第6期573-583,共11页
Geological Review
基金
国家黄金总公司资助项目
关键词
小壳化石
清河镇化石群
白云鄂博群
内蒙古
Wudaowan small shelly fossil
Qinghezhen fossil group
Bayan Obo Group
Caledonian fold belt
Inner Mongolia
