The lower paleozoic strata in the south kunlun massif are kulafuhe group of cambbrian - ordovician . they consists of metamorphic detrital rocks , limestone , magnetite - bearing basalt , quartzite ( meta - silicalite ) , which suggests that they might form at active continent margin . the geochemical characteristics of volcanic and detrital rocks do indicate that they might form at an active marginal environment such as island arc etc . associated with the qimanyuter ophiolite suit , there are lots of early paleozoic granitic plutons 在昆南地块上的早古生代地层为寒武?奥陶系库拉甫河岩群，由变碎屑岩、灰岩、含磁铁矿玄武岩、石英岩(变硅质岩)等组成，显示其比昆北地块有较大的活动性，火山岩和碎屑岩的岩石地球化学特征也反映为岛弧及活动边缘环境。
According to the characteristics of strata , tectonization and magmatism within the research area in the southwest margin of north china paleocontinent , and under the ideological guidance of mobilism and systematology , the geotectonic framework of the area could be divided as follows : ( 1 ) the longshoushan mountains continental margin ; ( 2 ) the hexi corridor back - arc basin ; ( 3 ) the northern qilianshan mountains suture zone ; ( 4 ) the central qilianshan mountains dispersion type island arc terrane ; ( 5 ) the southern qilianshan mountains back - arc basin ; ( 6 ) the qaidam massif 根据本区地层、构造、岩浆作用特点，在“系统论” 、 “活动论”思想指导下，厘定华北古大陆西南边缘的构造格局如下：龙首山陆缘带、河西走廊弧后盆地、北祁连缝合带、中祁连离散型岛弧地体、南祁连弧后盆地、柴达木地块。
Chagan sag is a secondary tectonic unit in chagandelesu depression , northeastern yingen - eji ' naqi basin , and the basement of the basin is a paleozoic fold belt of continental margin or island arc at the connection region of north china plate * tarim plate and kazakstan plate , with the character of erogenic belt . in working area and its adjacent area , the forming tectonic setting of indosinian intrusion was that orogenic belt pressed strongly , intracontinental subduction ; that of early yanshan movement epoch was the stress field transferred from compression to extension meanwhile the incrassate crust of orogenic zone turned to extensional collapse ; and that of early cretaceous volcanics was that the area structure extensional collapse further more during the post period of orogenic phase 查干凹陷属于银根?额济纳旗盆地东北端查干德勒苏坳陷内的一个次级构造单元，其盆地基底为古生代时期华北板块、哈萨克斯坦板块和塔里木板块交接部位形成的陆缘或岛弧褶皱带，具有古生代造山带的性质。研究区及邻区印支期侵入岩形成于造山带强烈挤压陆内俯冲的构造环境；燕山早期侵入岩形成于由挤压转向拉伸、造山带的增厚陆壳开始发生伸展垮塌的构造环境；早白垩世火山岩形成于造山期后进一步发生伸展垮塌的区域构造环境。
It is very resembly representative island arc volcanic rock in the geochemistry character , so i demonstrate that a petrofabric formed tectonic activity section and island arc environment ; i also demonstrate that parametamorphite in the a petrofabric formed tectonic activity section . b petrofabric is very resembly a petrofabric in many aspects , so i think that b petrofabric also formed island arc environment , but volcanic activity obvious weakened in the b petrofabric stage . c petrofabric formed carbonatite mesa 在地球化学特征方面与典型岛弧火山岩非常相似，得出a岩组形成于构造活动区，形成环境为岛弧环境。 a岩组的副变质岩的原岩碎屑岩是快速堆积的，处于构造活动区。 b岩组和a岩组对应的岩石在各个方面都非常相似，所以形成环境也为岛弧环境，只是火山活动在这期间明显减弱。
Geotectonically , the youjiang sedimentary basin was referred as youjiang yindosinian folded belt . triassic turbidites accumulated in the basin were derived from surrounding ancient lands including yuebei , jiangnan , and yunkai . tectonic setting of the sedimentary basin was in between an active continental margin and a continental island arc 赋矿浊积岩系的主要物源区为盆地周围的“越北古陆” 、 “江南古陆”和东边地区包括钦防海西褶皱带在内的“云开古陆” ，沉积构造背景介于大陆岛弧和活动大陆边缘之间的过渡构造环境。
Chagan fault depression is a secondary tectonic unit in chagandelesu subbasin , northeastern yingen - ejinaqi basin , and the basement of the basin is a paleozoic fold belt of continental margin or island arc with the character of erogenic belt at the connection region of north china plate , tarim plate and kazakstan plate 查干德勒苏凹陷属于银根?额济纳旗盆地东北端查干德勒苏坳陷内的一个次级构造单元。其基底为古生代时期华北板块、塔里木板块和哈萨克斯坦板块交接部位的陆缘或岛弧褶皱带，具有古生代造山带的性质。
The continent in mid - westhern inner mongolia is composed of a microcontinent , three volcanic island arcs and three back - arc basins , which are north china microcontinent , baiyun obo back - arc basin , bainaimiao volcanic island arc , wendurmiao back - arc basin , sunitezue - xilinhaote volcanic island arc , hegenshan back - arc basin and erlianhaote - xilinguole volcanic island arc respectively 摘要内蒙古中西部大陆由一个微大陆、三条弧后盆地和三条火山岛弧，即华北微大陆、白云鄂博弧后盆地、白乃庙火山岛弧、温都尔庙弧后盆地、苏尼特左锡林浩特火山岛弧、贺根山弧后盆地和二连浩特锡林郭勒火山岛弧组成。
In the light of tectonic evolution stage and metallogenesis , these metallogenic system ( assemblage ) could be classified as follows : ( 1 ) the pre - divergent metallogenic system in the southwest margin of north china paleocontinent in the archean - meso proterozoic : dongdashan iron , jinchuan nickel - copper . ( 2 ) the divergent metallogenic system in the northern margin of the qaidam paleoplate in the middle - late proterozoic : huashugou - liugouxia iron . ( 3 ) the metallogenic system in the active margin in the early paleozoic : the metallogenic assemblage in the island arc - rift in the early stage ( baiyinchang - qingshuigou copper - polymetallic ) ; the metallogenic assemblage in island arc in the middle - late stage ( honggou - jiaolongzhang copper - polymetallic ) ; the back - arc extensional basin ( zhuzhuiyaba - jiugequan - shijuli copper ) ; the metallogenic assemblage in connection with subduction and magmatic - hydatogenesis ( taergou - xiaoliugou wolfram ; huashugou - liugouxia copper ; dadonggou - diaodaban lead - zinc ) ; the metallogenic assemblage is related to the oceanic crustal shards ( dadaoerji chromite ; yushigou chromite ) . ( 4 ) the metallogenic system has something to do with collision - type orogeny : the metallogenic assemblage in foreland basin ( tianlu copper ) ; the metallogenic assemblage with the intracontinental orogeny and ductile shear ( hanshan - yingzhuishan gold ) 根据构造发展阶段和成矿作用特点，确定本区成矿系统及组合如下： ( 1 )华北板块西南边缘太古宙中元古代裂解期前成矿系统：东大山铁成矿组合，金川镍铜成矿组合； ( 2 )柴达木板块北缘中、新元古代裂解成矿系统：桦树沟柳沟峡铁成矿组合； ( 3 )加里东期活动大陆边缘成矿系统：早期岛弧裂谷成矿组合(白银厂清水沟铜及多金属成矿组合) ，中、晚期岛弧成矿组合(红沟蛟龙掌铜及多金属成矿组合) ，弧后扩张盆地成矿组合(猪咀哑巴九个泉石居里铜及多金属成矿组合) ，与俯冲作用有关的岩浆热液成矿组合(塔尔沟小柳沟钨成矿组合，桦树沟柳沟峡铜成矿组合，大东沟吊大坂铅锌成矿组合) ，洋壳残片成矿组合(大道尔吉铬成矿组合，玉石沟铬成矿组合) ； ( 4 )碰撞造山成矿系统：前陆盆地成矿组合(天鹿铜成矿组合) ，陆内造山韧性剪切成矿组合(寒山鹰咀山金成矿组合) 。
