本文選題：揚子克拉通 + 太古宙　； 參考：《中國地質(zhì)大學》2016年博士論文

【摘要】：克拉通是大陸巖石圈古老而穩(wěn)定的部分,經(jīng)歷了多期次大陸碰撞和裂解過程,保存有大量前寒武地殼演化信息。揚子克拉通零星出露有太古宙基底,主要分布在克拉通北緣。通過對揚子克拉通崆嶺雜巖北部變沉積巖,以及崆嶺雜巖南部片麻巖、斜長角閃巖、混合巖、變沉積巖進行礦物學、地球化學、年代學為主的綜合研究,并結(jié)合區(qū)域已有研究成果,取得了以下研究進展：(1)北崆嶺變沉積巖的源巖沉積時間為2.15-2.0 Ga,并且沉積事件與揚子克拉通2.2-2.1 Ga島弧相關(guān)生長事件存在聯(lián)系；2.2-2.1 Ga生長事件形成了后河花崗質(zhì)組分并且為崆嶺變沉積巖提供古元古代物質(zhì)來源；古元古代2.4-1.85 Ga揚子克拉通經(jīng)歷了陸-弧-陸碰撞及裂解過程。(2)南崆嶺經(jīng)歷了太古宙2.9 Ga、2.7-2.6 Ga,古元古代2.4 Ga、1.77 Ga,新元古代0.8 Ga地殼生長和再造過程,并保存有2.5 Ga、2.14 Ga、2.0 Ga鋯石年齡記錄；南、北崆嶺具有高度相似的巖漿事件記錄,南崆嶺相當于經(jīng)歷了2.7-2.6 Ga再造過程的北崆嶺西部。(3)在限定了揚子克拉通古元古代板塊范圍的基礎(chǔ)上,依托地球物理資料、地球化學數(shù)據(jù)、地質(zhì)年代學數(shù)據(jù)并結(jié)合陸-弧-陸地殼演化過程,劃定近似南北方向的古元古碰撞帶：沿著大別山黃土嶺-北緣崆嶺-中部寧鄉(xiāng)-中南部四堡區(qū)域。(4)梳理揚子克拉通太古宙至古元古代地殼增生及再造過程；通過對具有相似演化過程的太古宙克拉通開展研究,探索揚子克拉通與其他克拉通之間的親緣關(guān)系。本文綜合現(xiàn)有研究成果,提出概念化模型：揚子克拉通在3.5-1.8 Ga時期參與了超級克拉通”Vaalbara"與”Zimgam"之間的裂解和再拼合過程。
[Abstract]:The craton is an ancient and stable part of the continental lithosphere, which has undergone many subcontinental collision and fragmentation processes and contains a large amount of information on the evolution of the Precambrian crust. Archean basement appeared sporadically in Yangtze craton, mainly distributed in the northern margin of craton. The mineralogy, geochemistry and geochronology of the metamorphic rocks in the northern part of the Yangtze Craton Kongling complex, as well as the gneiss, amphibolite, migmatite and metamorphic sedimentary rocks in the southern part of the Kongling complex, are studied. And combined with the existing research results in the region, The following research progress has been made: 1) the sedimentary time of the source rocks in the Beikongling variable sedimentary rocks is 2.15-2.0 Ga, and the sedimentary events are related to the Yangzi craton 2.2-2.1 Ga island-arc related growth events, resulting in the formation of Houhe granitic composition and association between the sedimentary events and the Yangzi craton 2.2-2.1 Ga island arc growth events. And provides Gu Yuan ancient material source for Kongling variable sedimentary rock; Paleoproterozoic 2.4-1.85 Ga Yangtze craton experienced a land-to-arc-land collision and pyrolysis process.) Nankongling experienced Archean 2.9 Ga 2.7-2.6 Ga, Paleoproterozoic 2.4 Ga 1.77 Ga, Neoproterozoic 0.8 Ga crustal growth and reconstruction process, and preserved 2.5 Ga2. 14 Ga 2.0 Ga zircon age records. The southern and northern Kongling have highly similar magmatic event records, and the southern Kongling is equivalent to the western Beikongling, which has undergone 2.7-2.6 Ga reengineering. On the basis of defining the range of the Gu Yuan plate in the Yangtze craton, the South Kongling relies on geophysical data. Geochemical data, geochronological data and the process of continental arc-land crust evolution, Delineation of the Gu Yuan paleo-collision zone in the north-south direction: along the Loess Ridge to the North margin of the Dabie Mountains, the Kongling in the North margin of the Dabie Mountains, Ningxiang in the Central China and Sibao area in the Central South) to sort out the process of crustal accretion and reconstruction from Archean to Gu Yuan in the Yangtze Craton; The phylogenetic relationship between the Yangtze craton and other cratons was explored by studying the Archean craton with similar evolution process. Based on the existing research results, a conceptual model is proposed in this paper: the Yangtze craton participated in the process of cracking and reassembling the super craton "Vaalbara" and "Zimgam" in the period of 3.5-1.8 Ga.
【學位授予單位】：中國地質(zhì)大學
【學位級別】：博士
【學位授予年份】：2016
【分類號】：P313

【參考文獻】

相關(guān)期刊論文 前10條

1 HU Juan;LIU XiaoChun;CHEN LongYao;QU Wei;LI HuaiKun;GENG JianZhen;;A~2.5 Ga magmatic event at the northern margin of the Yangtze craton:Evidence from U-Pb dating and Hf isotope analysis of zircons from the Douling Complex in the South Qinling orogen[J];Chinese Science Bulletin;2013年Z2期

2 WANG ZhengJiang;WANG Jian;DU QiuDing;DENG Qi;YANG Fei;WU Hao;;Mature Archean continental crust in the Yangtze craton: Evidence from petrology, geochronology and geochemistry[J];Chinese Science Bulletin;2013年19期

3 ;The discovery of the oldest rocks in the Kuluketage area and its geological implications[J];Science China(Earth Sciences);2011年03期

4 ;Reappraisement and refinement of zircon U-Pb isotope and trace element analyses by LA-ICP-MS[J];Chinese Science Bulletin;2010年15期

5 ;The oldest basement rock in the Yangtze Craton revealed by zircon U-Pb age and Hf isotope composition[J];Science in China(Series D:Earth Sciences);2009年09期

6 ;Zircon U-Pb age and Hf isotope of Quanyishang A-type granite in Yichang: Signification for the Yangtze continental cratonization in Paleoproterozoic[J];Chinese Science Bulletin;2009年03期

7 翟明國;彭澎;;華北克拉通古元古代構(gòu)造事件[J];巖石學報;2007年11期

8 ;Formation and evolution of Precambrian continental crust in South China[J];Chinese Science Bulletin;2007年01期

9 吳元保,陳道公,夏群科,Etienne DELOULE,程昊;北大別黃土嶺麻粒巖鋯石U-Pb離子探針定年[J];巖石學報;2002年03期

10 陳道公,Etienne DELOULE,夏群科,吳元保,程昊;大別山雙河超高壓榴輝巖中變質(zhì)鋯石:離子探針和微區(qū)結(jié)構(gòu)研究[J];巖石學報;2002年03期

，

本文編號：1803165