CAJ | 학술논문

宁夏中奥陶统香山群为一套遭受轻微区域变质的灰绿色中-细粒长石石英砂岩、板岩、砾屑灰岩和硅质岩等,从下到上可分为徐家圈组、狼嘴子组和磨盘井组.系统地论述了香山群发育的各种深水沉积的特征及其沉积序列,认为香山群由深水原地沉积和深水异地沉积组成,其中后者主要包括浊流沉积、碎屑流沉积、内波、内潮汐沉积和深水复合流沉积.垂向组成单元自下而上依次为浊流沉积层(Ⅰ)、牵引流沉积层(Ⅱ)和半深海沉积层(Ⅲ).这些认识不仅对进一步开展香山群的沉积学研究具有重要的意义,而且也可为该地区早古生代构造环境的研究提供重要的信息,同时也为目前在国际上引起注意的深水重力流的流体特征研究提供新的实例.
저하중오도통향산군위일투조수경미구역변질적회록색중-세립장석석영사암、판암、력설회암화규질암등,종하도상가분위서가권조、랑취자조화마반정조.계통지논술료향산군발육적각충심수침적적특정급기침적서렬,인위향산군유심수원지침적화심수이지침적조성,기중후자주요포괄탁류침적、쇄설류침적、내파、내조석침적화심수복합류침적.수향조성단원자하이상의차위탁류침적층(Ⅰ)、견인류침적층(Ⅱ)화반심해침적층(Ⅲ).저사인식불부대진일보개전향산군적침적학연구구유중요적의의,이차야가위해지구조고생대구조배경적연구제공중요적신식,동시야위목전재국제상인기주의적심수중력류적류체특정연구제공신적실례.
The Xiangshan Group in Ningxia Autonomous Region, composed of grayish green, fine to medium-grained light metamorphic subarkoses, slates, gravelclast limestones and cherls, was divided into three formations, from bottom to top as follows: Xujiajuan, Langzuizi and Mopanjing Formation. The sedimentary features of each type and the vertical sedimentary association were systematically described. The results indicate that the sedimentary type composed of in situ deposits and autochthonous in deep water, and the later includes the deposits of turbidity currents, debris flows, inter nal waves and internal-tides, and deep-water combined flows. And the vertical sedimentary association can be divided into a lower dense flow deposit division (Ⅰ) , an intermediate traction flow deposit division (Ⅱ) , and an upper hemipe-lagic deposit division (Ⅲ). All these have a great significance both in the sedimentary research of Xiangshan Group and the tectonic environment in early Paleozoic of the study area, and also provide an example for the research of sedimentary currents of gr0avity flow in deep water.