课题基金基金详情
新疆西准噶尔北缘珠万托别增生杂岩带生长时序研究及其意义
结题报告
批准号:
41902231
项目类别:
青年科学基金项目
资助金额:
27.0 万元
负责人:
陈艺超
依托单位:
学科分类:
D0211.大地构造学与构造地质学
结题年份:
2022
批准年份:
2019
项目状态:
已结题
项目参与者:
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中文摘要
增生杂岩的构造解析,对研究俯冲带构造构造演化过程具有重要的意义。通过将其拆分为系列构造岩片,逐一研究其形成-就位时序,可为理解俯冲带构造演化过程提供支撑。然而对比现代活动俯冲带,古老造山带中增生楔精细生长序列研究稍显薄弱,制约了对增生型造山带生长过程及机理的理解。西准噶尔北缘塔尔巴哈台增生杂带分为南北两部分,南部额敏蛇绿岩带就位于晚石炭世,且自北向南存在数百万年尺度的变年轻生长序列;北部珠万托别混杂岩带被早石炭世岩体钉合,但其增生时序尚未得到解析。故塔尔巴哈台增生杂岩带南北两部分是否存在数十百万年的生长,北部珠万托别混杂带是否同样存在数百万年的生长,需进一步研究。. 本课题拟在珠万托别混杂带进行大比例尺构造填图、岩片形成-就位时序分析,从而还原不同时间尺度上塔尔巴哈台增生杂岩带生长时序,为探讨该地区晚古生代构造演化提供制约,也为理解古老增生型造山带生长过程及机理提供窗口。
英文摘要
The structural anatomy of accretionary complex is of great importance to the understanding of the evolutionary history of subduction tectonics. It can help to restore the subduction zone evolutionary history by structurally dividing the accretionary complex into tectonic slices and studying their individual formation – accretion time sequence. However, it is less focused for the accretion sequence anatomy of the ancient accretionary orogeny when it is compared with the modern subduction zone, which becomes a major obstacle for the understanding of the process and mechanism of accretionary type orogenic belt. The Northern West Junggar develops the Tarbagatay complex, which can be tectonically divided two major parts: the southern part, represented as the late Carboniferous accreted E’min ophiolite, which develops several million years’ southward younging; and the northern part, represented as the Zhuwantuobie complex, stitched by early Carboniferous plutons, of which the accretion sequence remains unclear. Thus it is important to figure out: 1. Is there a dozens of million years’ accretion sequence on the whole Tarbagatay accretionary complex, from the northern part Zhuwantuobie complex that is stitched by early Carboniferous pluton, to the southern part E’min ophiolite that is stitched by late Carboniferous dike? 2. Is there a several million years’ accretion sequence on the Zhuwantuobie complex, like the E’min ophiolite? . Thus, this study carry out large scale structural mapping, the formation – accretion sequence analyzing on the Zhuwantuobie complex of West Junggar, in order to add new constrains on late Paleozoic evolutionary history of this area, and helps to understand the process and mechanism on the growth of ancient accretionary type orogeny.
增生杂岩记录了造山带俯冲-碰撞过程。本项目基于大比例尺填图,揭露了新疆塔尔巴哈台山及其周边出露的增生杂岩中典型的岩石组合和变形序列,限定了增生杂岩的形成-就位时序,讨论了造山带结构特征与演化规律。取得成果如下:.1、弧-弧碰撞造山过程。研究发现萨吾尔弧和成吉斯弧之间发育有典型的增生杂岩带,具有两套明显不同的年代学结构:南部单元主要形成于晚志留世(最大沉积时代为 428~450 Ma,不整合盖层时代为402~415 Ma),物源以早古生代年龄为主(430~510Ma),与成吉斯弧相关;北部单元主要形成于晚石炭世,物源为石炭纪的单年龄峰(350~370 Ma),不含早古生代锆石,与萨吾尔弧相关。因此,本研究区由形成于早古生代、晚古生代的两个增生杂岩构造拼合而成,分别代表了北部萨吾尔岛弧、南部成吉斯岛弧的弧前杂岩,是大洋双向俯冲闭合的遗迹。这项研究证明中亚造山带存在双向俯冲及弧-弧碰撞过程。.2、探讨造山带演化规律。申请人总结了增生弧的野外识别标志和其构造意义;探讨了造山带中缝合面的理论形态与识别特征;提出应变分配可在挤压应力场下造成特殊的区域性伸展事件与岩浆作用。同时,利用接触变质带限定了A型花岗岩岩浆温度。这些研究为理解造山带演化规律提供了新的视角。
期刊论文列表
专著列表
科研奖励列表
会议论文列表
专利列表
DOI:10.12017/dzkx.2021.031
发表时间:2021
期刊:地质科学
影响因子:--
作者:陈艺超;张继恩;侯泉林;闫全人;肖文交
通讯作者:肖文交
DOI:--
发表时间:2021
期刊:岩石学报
影响因子:--
作者:陈艺超;张继恩;田忠华;闫全人;侯泉林;肖文交
通讯作者:肖文交
Late Silurian to early Devonian development of the Chingiz accretion arc, West Junggar: insights into accretion arc evolution in the Central Asia Orogenic Belt
西准噶尔成吉思特增生弧晚志留世至早泥盆世的发育:中亚造山带增生弧演化的见解
DOI:10.1080/00206814.2020.1824128
发表时间:2020-09
期刊:International Geology Review
影响因子:2.6
作者:Chen Yichao;Zhang Ji'En;Xiao Wenjiao;Zhou Renjie;Song Shuaihua;Zhang Zhiyong;Ao Songjian;Sang Miao;Zhang Qian W. L.;Li Rui;Li Zhen M. G.;Liu Yin;Zhang Hui C. G.;Liu Jiahui;Wu Chunming
通讯作者:Wu Chunming
DOI:10.1130/b36541.1
发表时间:--
期刊:Geological Society of America Bulletin
影响因子:4.9
作者:Yichao Chen;Jiahui Liu;Renjie Zhou;Wenjiao Xiao;Ji’en Zhang;Zhiyong Zhang;Qian W.L. Zhang;Zhen M.G. Li;Chunming Wu
通讯作者:Chunming Wu
Extensional magmatism caused by strain partitioning: insights from the mafic dikes hosted in Biesituobie batholith in West Junggar, CAOB
应变分配引起的伸展岩浆作用:来自中亚盆地西准噶尔别斯托别基岩基性岩脉的见解
DOI:10.1007/s00531-022-02234-w
发表时间:2022-08
期刊:International Journal of Earth Sciences
影响因子:2.3
作者:Yichao Chen;Jiahui Liu;Renjie Zhou;Wenjiao Xiao;Ji’en Zhang;Zhiyong Zhang;Qian W. L. Zhang;Zhen M. G. Li;Chunming Wu
通讯作者:Chunming Wu
敦煌造山带构造混杂带变质-变形过程及地质意义
  • 批准号:
    42372258
  • 项目类别:
    面上项目
  • 资助金额:
    53万元
  • 批准年份:
    2023
  • 负责人:
    陈艺超
  • 依托单位:
国内基金
海外基金