有關內蒙古西拉木倫帶古生代-早中生代構造環(huán)境的討論
發(fā)布時間：2018-07-14 13:21
【摘要】：針對近年來對華北板塊與南蒙微大陸碰撞時限與演化歷史的爭論,本文通過內蒙古西拉木倫河兩側雙井-杏樹洼一帶不同時期地質體的解析,反演了與古生代-中生代構造演化有關的三段歷史:(1)由杏樹洼組和所裹挾的蛇綠巖塊組成的小葦塘巖片記錄了早古生代末弧前盆地演化的歷史;(2)由早二疊世末期侵位的中-基性巖墻和中二疊世的克德河砂礫巖充填的斷陷盆地顯示了板塊碰撞造山后年輕陸殼經受的伸展作用;(3)中二疊世和中三疊世伸展背景下的巖漿活動,根據興蒙造山帶乃至中亞造山帶巖漿活動的研究,結合前人對雙井地區(qū)的研究成果,認為控制這一巖漿活動的是幔源巖漿上涌的底侵作用,而不是"同碰撞"的擠壓-匯聚環(huán)境,因此花崗巖的形成不能作為板塊碰撞時間的約束。
[Abstract]:In view of the controversy over the time limit and evolution history of the collision between the North China plate and the Southern Mongolian microcontinent in recent years, the geological bodies in the area of Shuangjing-Xingshuwa on the two sides of the West Lamulen River in Inner Mongolia have been analyzed in different periods. Three sections of history related to the Paleozoic to Mesozoic tectonic evolution have been inversed: (1) the evolution of the early Paleozoic late Paleozoic forearc basin was recorded by the Xiaoweitang lithocline composed of Xingshuwa formation and ophiolite blocks; (2) the evolution of the late early Permian era was recorded from the end of the early Permian. The emplacement of the Meso-basic rock wall and the Middle Permian Kede River sand conglomerate filled fault depression basin show the extension of the young continental crust after the plate collision orogeny. (3) magmatic activity in the context of the Middle Permian and the Middle Triassic extensions. According to the study of magmatic activity in Xingmeng orogenic belt and Central Asia orogenic belt, combined with the previous research results in Shuangjing area, it is considered that the mantle magmatic upwelling is controlled by the underthrust of mantle magma upwelling. The formation of granite can not be used as a constraint of plate collision time.
【作者單位】： 造山帶與地殼演化教育部重點實驗室 北京大學地球與空間科學學院;內蒙古第十地質礦產勘查開發(fā)院;沈陽地質礦產研究所;
【基金】：中國地質調查項目(121201102000150009)資助
【分類號】：P542
[Abstract]:In view of the controversy over the time limit and evolution history of the collision between the North China plate and the Southern Mongolian microcontinent in recent years, the geological bodies in the area of Shuangjing-Xingshuwa on the two sides of the West Lamulen River in Inner Mongolia have been analyzed in different periods. Three sections of history related to the Paleozoic to Mesozoic tectonic evolution have been inversed: (1) the evolution of the early Paleozoic late Paleozoic forearc basin was recorded by the Xiaoweitang lithocline composed of Xingshuwa formation and ophiolite blocks; (2) the evolution of the late early Permian era was recorded from the end of the early Permian. The emplacement of the Meso-basic rock wall and the Middle Permian Kede River sand conglomerate filled fault depression basin show the extension of the young continental crust after the plate collision orogeny. (3) magmatic activity in the context of the Middle Permian and the Middle Triassic extensions. According to the study of magmatic activity in Xingmeng orogenic belt and Central Asia orogenic belt, combined with the previous research results in Shuangjing area, it is considered that the mantle magmatic upwelling is controlled by the underthrust of mantle magma upwelling. The formation of granite can not be used as a constraint of plate collision time.
【作者單位】： 造山帶與地殼演化教育部重點實驗室 北京大學地球與空間科學學院;內蒙古第十地質礦產勘查開發(fā)院;沈陽地質礦產研究所;
【基金】：中國地質調查項目(121201102000150009)資助
【分類號】：P542
【相似文獻】
相關期刊論文 前10條
1 張傳恒,張世紅;弧前盆地研究進展綜述[J];地質科技情報;1998年04期
2 W.Van der Werff ,蔡群昌;東巽他弧的龍自弧前盆地的新生代演化和地震地層[J];海洋地質譯叢;1994年06期
3 郝杰,李日俊;日喀則殘留型弧前盆地的構造與沉積演化[J];中國科學院研究生院學報;1997年01期
4 閆全人,王宗起,A.D.Hanson,P.A.Druschke,王濤,閆臻;南秦嶺橫丹濁積巖系——晚古生代發(fā)育于揚子板塊被動陸緣上的弧前盆地充填物[J];地質通報;2002年Z2期
5 楊宗讓;川西松潘-甘孜弧前盆地的形成及演化[J];沉積與特提斯地質;2002年03期
6 郝杰,柴育成,李繼亮;雅魯藏布江蛇綠巖的形成與日喀則弧前盆地沉積演化[J];地質科學;1999年01期
7 賈建稱,溫長順,王根厚,張振利,汪立軍;西藏仲巴縣窮果北部日喀則弧前盆地地層再認識[J];西北地質;2005年02期
8 G.Einsele;S.Dürr;W.Frisch;劉光華;H.P.Luterbacher;L.Ratschbacher;W.Ricken;J.Wendt;A.Wetzel;劉寶s，
本文編號：2121782
本文鏈接：http://sikaile.net/kejilunwen/diqiudizhi/2121782.html
