發(fā)布時(shí)間：2020-12-21 18:04

　　由于花崗巖記錄了陸殼演化的重要信息,所以其成因問題被越來越多的學(xué)者所關(guān)注。秦嶺造山帶出露大量的古生代花崗巖。在過去的幾十年中,大家普遍認(rèn)為這些花崗巖的成因十分重要。本學(xué)位論文選擇北秦嶺造山帶出露的高M(jìn)g閃長巖和桐柏造山帶出露的過堿性A型花崗巖為研究對象,并且將這些古生代花崗巖的成因和交代地幔相聯(lián)系。本學(xué)位論文就北秦嶺看峰溝巖體和桐柏造山帶黃羊山巖體進(jìn)行了詳細(xì)的鋯石微區(qū)U-Pb同位素測定、全巖主微量分析、全巖Sr-Nd和鋯石Hf-O同位素測定。系統(tǒng)的LA-ICP-MS鋯石U-Pb同位素分析表明二郎坪高M(jìn)g花崗閃長巖形成于約440 Ma。這些高M(jìn)g花崗閃長巖有適中的SiO₂（60.48-64.67 wt.%）和K₂O（1.21-2.10 wt.%）、高Al₂O₃（15.44-16.51 wt.%）和Na₂O（4.01-4.81 wt.%）含量、高M(jìn)gO含量（2.30-3.44 wt.%）和高M(jìn)g#（53.35-56.66）。全巖部分微量元素組成與陸殼相似:有高的Ba（524-113... 

【文章來源】：中國地質(zhì)大學(xué)湖北省 211工程院校 教育部直屬院校

【文章頁數(shù)】：96 頁

【學(xué)位級別】：博士

【文章目錄】：
Resume of the Author
摘要
abstract
Chapter 1 Introduction
    1.1 Research Status and Scientific Issues of granites
        1.1.1 Evolution of granites
        1.1.2 Zircon and granite evolution
        1.1.3 Early Paleozoic granites in the Qinling-Tongbai Orogen
    1.2 Research objectives and significance
        1.2.2 Research objectives
        1.2.4 Research Significance
    1.3 Structure of the thesis
    1.4 Workload
Chapter 2 Regional Geology
Chapter 3 Methodology
    3.1 Introduction
    3.2 Zircon Geochronology
    3.3 In-situ zircon Lu-Hf and O isotope analyses
    3.4 Whole-rock elemental and Sr-Nd analyses
Chapter 4 Paleozoic high-Mg granodiorite from the North Qinling Belt .
    4.1 Introduction
    4.2 Results
        4.2.2 LA-ICPMS U-Pb dating
        4.2.3. Hf isotope
        4.2.4. O isotope
        4.2.5. Whole-rock geochemistry
        4.2.6. Sr-Nd isotopes
    4.3. Discussion
        4.3.1. Formation ages of the Erlangping granodiorite pluton
        4.3.2. Petrological classification
        4.3.3. Petrogenesis of the high-Mg granodiorite
Chapter 5 Early Paleozoic Peralkaline A-type granitoids from the South Qinling Orogen
    5.1 Introduction
    5.2 Results
        5.2.1 LA-ICPMS U-Pb dating
        5.2.2 Hf-O isotope compositions
        5.2.3 Geochemical characteristics
    5.3 Discussion
        5.3.1 Geochronology of the Huangyangshan pluton
        5.3.2 Petrological classification of the Huangyangshan granite
        5.3.3 Zircon geothermometry
        5.3.4 Petrogenesis of the Huangyangshan A-type magmatism
Chapter 6 Tectonic interpretation
Chapter 7 Conclusion & Recommendation
    7.1 Conclusion
    7.2 Recommendation
Acknowledgements
References


【參考文獻(xiàn)】：
期刊論文
[1]東秦嶺-大別山及其兩側(cè)的巖漿和變質(zhì)事件年代學(xué)及其形成的大地構(gòu)造背景[J]. 蘇文,劉景波,陳能松,郭順,巴金,張璐,劉新,施雨新.  巖石學(xué)報(bào). 2013(05)
[2]東秦嶺陡嶺雜巖花崗巖的Sr-Nd-Pb同位素特征及其地質(zhì)意義[J]. 楊斌虎,張成立,李雷.  地質(zhì)通報(bào). 2011(Z1)
[3]Timing of the Wudangshan, Yaolinghe volcanic sequences and mafic sills in South Qinling: U-Pb zircon geochronology and tectonic implication[J]. LING WenLi1,2, REN BangFang1,2, DUAN RuiChun1,2, LIU XiaoMing1,3, MAO XinWu4, PENG LianHong4, LIU ZaoXue4, CHENG JianPing1 & YANG HongMei1,2 1 Faculty of Earth Sciences, China University of Geosciences, Wuhan 430074, China; 2 State Key Laboratory of Geological Process and Mineral Resources, China University of Geosciences, Wuhan 430074, China; 3 State Key Laboratory of Continental Geodynamics, Northwest University, Xi’an 710069, China; 4 Geological Survey of Hubei Province, Wuhan 430022, China.  Chinese Science Bulletin. 2008(14)
[4]Making continental crust:The sanukitoid connection[J]. Yoshiyuki TATSUMI.  Chinese Science Bulletin. 2008(11)
[5]地殼根、造山熱與巖漿作用[J]. 馬昌前,佘振兵,張金陽,張超.  地學(xué)前緣. 2006(02)
[6]Silurian A-type granitoids in the southern margin of the Tongbai-Dabieshan: Evidence from SHRIMP zircon geochronology and geochemistry[J]. MA Changqian, SHE Zhenbing, XU Pin & WANG Lingyan State Key Laboratory of Geological Processes and Mineral Resources, and Faculty of Earth Sciences, China University of Geosciences, Wuhan 430074, China.  Science in China(Series D:Earth Sciences). 2005(08)
[7]Genesis of zircon and its constraints on interpretation of U-Pb age[J]. WU Yuanbao & ZHENG Yongfei School of Earth and Space Sciences,University of Science and Technol- ogy of China,Hefei 230026,China Correspondence should be addressed to Wu Yuanbao(e-mail: ybwu @ustc.edu.cn).  Chinese Science Bulletin. 2004(15)
[8]秦嶺造山帶泥盆紀(jì)的沉積體系與古地理格局演化[J]. 梅志超,孟慶任,崔智林,屈紅軍.  古地理學(xué)報(bào). 1999(01)



本文編號：2930248