拉槽 meaning in Chinese
broached groove
Examples
- Application of combined cut to sublevel open - stope in guabang mine of daye iron - mine
联合拉槽法在大冶铁矿铁门坎南采区分段空场采矿中的应用 - Most of areas are not deposited until benxi stage , except for helan aulacogen , where the deposit began in jingyuan stage
除贺兰拗拉槽北部从靖远期开始沉积外，绝大部分地区从本溪期才开始沉积。 - The sedimentary formation can be summarized as rift bay filling sequence , epicontinental sea filling sequence , offshore debris lake basin sequence and inner continental lake basin sequence . a framework of sequence stratigraphy for the upper palaeozic strata is established in the area . the helan aulacogen of upper carboniferous in the west margin of ordos can be divided into 12 sequences , and most of the upper palaeozoic strata in the area can be divided into 15 sequences
本文对研究区内上古生界进行了层序地层学探讨，将本区沉积建造概括为裂陷海湾充填层序、陆表海充填层序、近岸碎屑湖盆层序和内陆湖盆层序，建立了研究区上古生界层序地层学格架，西缘贺兰拗拉槽上石炭统划分为12个层序，本区大部分地区上古生界可划分出15个层序，并全面地概括了层序演化各阶段的具体特征。 - The mesoproterozoic mafic dyke swarms are extensively distributed in the central north china craton , which are not deformed and metamorphic , emplacing the pre - existed fractures , so the dyke swarms become the conspicuous marks to reconstruct the mesoproterozoic tectonic stress field of the central ncc . the mafic dykes in the northern block are transtensional while the dykes in the central and southern blocks are extensional . the mesoproterozoic tectonic stress field could be simulated on the analysis of the distribution and mechanical origin of the mesoproterozoic mafic dyke swarms in the central ncc . the simulation result shows that the mafic dyke swarms were formed in the extensional tectonic setting in the ncc in the mesoproterozoic time , which are related to the extension of the mesoproterozoic yanliao - zhongtiao aulacogens cross the central ncc
克拉通北部地块的镁铁质岩墙群为张剪性，而中部和南部地块为张性。根据华北克拉通中部中元古代镁铁质岩墙群的分布和成因机制分析，来恢复模拟中元古代的构造应力场。数值模拟结果表明镁铁质岩墙群在中元古代形成于伸展的大地构造背景，与横穿华北克拉通中部的燕辽-中条拗拉槽系的伸展作用有一定的联系。 - Some conclusions are listed as follows : the plateform cover cap of ordos basin and its circumference areas can be divided into five tectonic sequences . the tectonic evolution of ordos basin can be classified in six stages : the basement formation phase ( from archeozoic to paleoproterozoic ) ; the aulacogen phase ( from mesoproterozoic to neoproterozoic ) ; the north china continental sea phase ( from sinian to early - paleozoic ) ; the north china intracratonic depression phase ( from late - paleozoic to early mesozoic ) ; large ordos inland basin phase and the formation of independent ordos basin ( mid - late mesozoic ) ; fault basin phase around the ordos basin ( cenozoic )
通过研究有以下成果及认识：鄂尔多斯盆地及其周缘地区沉积盖层可划分为五大构造层序，盆地的形成和演化分为六大构造阶段：太古代至古元古代基底形成阶段、中新元古代克拉通内裂陷槽或坳拉槽演化阶段、震旦纪?早古生代华北陆表海盆演化阶段、晚古生代?早中生代华北克拉通坳陷演化阶段、中生代中晚期大鄂尔多斯内陆盆地演化阶段及独立鄂尔多斯盆地的形成、新生代周缘断陷盆地演化阶段。