| 那丹哈达岭北段上古生界基本地质特征 |
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| THE MAIN CHARACTERISTICS OF THE UPPER PALAEOZOIC STRATIGRAPHY AT THE NORTH NADANHADA RANGE,HEILONGJIANG PROVINCE, CHINA |
| In The Nadanhada Range, there crops out a thick sequence of marine sediments with in-terbedded volcanic rocks, which in 1959 was named as Erdaohezi Group and assigned to Meso-zoic on the ground of some Radiolaria collectes by M. G. Organov, I.N. Grolov and Wang Xi-uzhang. Since then, this region was considered tectonically a Mesozoic geosyclinal folding belt.However, during their field work carried out in the last two years in this region, the writersfound besides Radiolaria many Fusulinids and Corals in the sendiments. A thorough study of these has proved that the strate containing these fossils are of late Paleozoic age. Therefore, a new column is proposed as shown in table 1 (in Chinese). The oldest Paleozoic strata, named as Dadaihe group, distributed in the axial part of auticlinorium along the Wusuli River, are supposed to be of Devonian to lower Carboniferous age without convincing paleontological evidence. Conformably overlying them is the Erlianqiao Formation of middle Carboniferous, carrying in addition to Radiolaria also corals and abundant fusulinids such as Profusulinella, Fusulinella, Eostaffella, Further upward is the upper Carboniferous Banmiaogou Formation contianing corals and fusulinids such as Triticites, Pseudoschwagerina, Paraschwagerina, Chalaroschwagerina etc. The uppermost is Dongdagou Formation lower Permian, containing Nagatoella, Misellina in its lower part and Neoschwagerina, Reichelina, Kahlerina, Rauserella, Pseudodoliolina in the upper part. The so-called Nadanhada Mesozoic Geosynclinc Folding Belt is no longer supported by any evidence. |
| LI Wen-kang,HAN Jian-xiu,ZHANG Shu-xin,MENG Fan-yi.1979.THE MAIN CHARACTERISTICS OF THE UPPER PALAEOZOIC STRATIGRAPHY AT THE NORTH NADANHADA RANGE,HEILONGJIANG PROVINCE, CHINA[J].Acta Geoscientica Sinica,1(1):104-120. |
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