| 那丹哈达岭北段上古生界基本地质特征 |
| 点此下载全文 |
| 引用本文：李文亢,韩建修,张树新,孟凡义.1979.那丹哈达岭北段上古生界基本地质特征[J].地球学报,1(1):104-120. |
| DOI： |
| 摘要点击次数: 4764 |
| 全文下载次数: 6138 |
|
|
| 中文摘要:<正> 一、引言 那丹哈达岭位于黑龙江省的东部,是完达山脉的北东延伸部分,西界为宝清县大和镇,东邻苏联。这里分布着巨厚的海相沉积地层。1959年中、苏科学院黑龙江流域综合考察队乌苏里江地质队奥尔干诺夫、戈沃罗夫、王秀璋等把这套地层命名为二道河子岩群,三分为镇江岩系、向阳岩系及挠力河岩系。他们根据若干延续时代很长的放射虫残骸Nassellaria类(纲网虫类)、Spumellaria类(泡球虫类)和Charophyta(藻)及在邻区(即所谓宝清过渡带北)采到动物化石Monotis ocholica，而将上述三岩系分别划为上三叠统、下侏罗统及中侏罗统，这样便产生了“中生代地槽折皱带”动概念。 |
| |
| THE MAIN CHARACTERISTICS OF THE UPPER PALAEOZOIC STRATIGRAPHY AT THE NORTH NADANHADA RANGE,HEILONGJIANG PROVINCE, CHINA |
|
|
| Abstract: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. |
| 查看全文 查看/发表评论 下载PDF阅读器 |
|
|
|
|
|
