本文選題：東昆侖造山帶 + 黑海��； 參考：《地球科學(中國地質(zhì)大學學報)》2016年01期

【摘要】：東昆侖黑海地區(qū)發(fā)育加里東期過鋁質(zhì)花崗巖(424.0~420.5Ma),其形成與地殼的發(fā)展演化密切相關,主要通過巖相學和地球化學方法對其進行了研究.黑海過鋁質(zhì)花崗巖由黑云母英云閃長巖、黑云母花崗閃長巖、黑云母花崗巖、二云母花崗巖和白云母花崗巖組成.SiO_2變化區(qū)間為65.32%~75.87%,K_2O/Na_2O為0.47~1.52,δ為1.09~3.00,為鈣堿性-高鉀鈣堿性系列;A/CNK為1.02~1.31,屬于過鋁質(zhì)-強過鋁質(zhì)花崗巖.稀土元素具有輕稀土相對富集和重稀土相對虧損的特征,中等負銪異常.微量元素具有相對選擇性富集大離子親石元素而相對虧損高場強元素的特征.源區(qū)參與熔融物質(zhì)由以變雜砂巖為主,向以變泥質(zhì)巖為主過渡.結(jié)合區(qū)域資料,認為黑海過鋁質(zhì)花崗巖是東昆南俯沖增生雜巖楔發(fā)生伸展減薄引起地幔物質(zhì)底侵而促使富硅鋁地殼物質(zhì)發(fā)生不同程度部分熔融形成.
[Abstract]:Caledonian peraluminous granites (424.0 ~ 420.5 Ma) were developed in the Black Sea area of East Kunlun, and their formation is closely related to the development and evolution of the crust, which has been studied mainly by means of lithofacies and geochemistry. The Black Sea peraluminous granite consists of biotite quartz diorite, biotite granite, The variation range of the composition of dimite granite and Muscovite granite. SiO2 is 65.32 and 75.87. the K _ 2O / Na _ 2O / Na2O is 0.47 ~ 1.52, 未 is 1.09 ~ 3.00, and the calc-alkaline-high-potassium calc-alkaline series A / R _ (CNK) is 1.02n 1.31, which belongs to peraluminite-strong peraluminous granite. Rare earth elements are characterized by relative enrichment of light rare earth elements and relative depletion of heavy rare earths, and moderate negative europium anomalies. Trace elements are characterized by relatively selective enrichment of large ion lithophile elements and relative depletion of high field strength elements. The source region participated in the transition of melt material from metamorphic sandstone to argillaceous rock. In combination with regional data, it is considered that the Black Sea peraluminous granite is caused by extensional thinning of the subductive complex in the southern part of East Kunn, resulting in the submersion of mantle material, which leads to the formation of partial melting of the silicon-rich aluminum-rich crustal material in varying degrees.
【作者單位】： 中國地質(zhì)大學地球科學學院;陜西省地質(zhì)調(diào)查中心;
【分類號】：P588.121;;P595;;P597.3

【參考文獻】

相關期刊論文 前10條

1 姜高磊;張思敏;柳坤峰;張克信;;祁連-柴達木-東昆侖新元古-中生代沉積盆地演化[J];地球科學(中國地質(zhì)大學學報);2014年08期

2 羅文行;錢莉莉;李德威;朱云海;劉德民;高成;;東昆侖中灶火地區(qū)超鎂鐵質(zhì)輝石巖的成因[J];地球科學(中國地質(zhì)大學學報);2013年06期

3 查顯鋒;計文化;張海迪;李榮社;趙振明;潘術娟;陳銳明;;青海中部昆南增生雜巖帶變形分期及構造過程[J];地質(zhì)通報;2012年12期

4 張旗;;碰撞與花崗巖——碰撞是構造事件,不是構造環(huán)境[J];巖石礦物學雜志;2012年05期

5 潘桂棠;王立全;李榮社;尹福光;朱弟成;;多島弧盆系構造模式:認識大陸地質(zhì)的關鍵[J];沉積與特提斯地質(zhì);2012年03期

6 劉彬;馬昌前;張金陽;熊富浩;黃堅;蔣紅安;;東昆侖造山帶東段早泥盆世侵入巖的成因及其對早古生代造山作用的指示[J];巖石學報;2012年06期

7 ;Origin of middle Miocene leucogranites and rhyolites on the Tibetan Plateau: Constraints on the timing of crustal thickening and uplift of its northern boundary[J];Chinese Science Bulletin;2012年05期

8 張利云;丁林;楊迪;許強;蔡福龍;劉德亮;;藏北中中新世淡色花崗巖及流紋巖的成因:對高原北部邊界地殼加厚過程和隆升時代的制約[J];科學通報;2012年Z1期

9 劉戰(zhàn)慶;裴先治;李瑞保;李佐臣;陳國超;陳有p，

本文編號：2092493