克拉通作為一個(gè)穩(wěn)定的地質(zhì)構(gòu)造單元,具有厚的巖石圈地幔、低密度和熱流值、及高剛性等特征,包含古老的大陸地殼和巖石圈地幔,厚度一般為200～300 km,主要形成于前寒武紀(jì),是研究大陸形成和演化的主要對(duì)象。通常來(lái)說(shuō),克拉通厚而干的巖石圈地幔,使其能夠在很大程度上抵御后期地質(zhì)作用的改造而免于破壞,通�？煞�(wěn)定存在數(shù)十億年。因此,傳統(tǒng)理論認(rèn)為克拉通是穩(wěn)定的。然而,近年來(lái)的研究表明,穩(wěn)定的克拉通也可以變得不再穩(wěn)定,即發(fā)生了“克拉通破壞”。全球大多數(shù)克拉通在其形成之后都遭到了不同程度的破壞,從而導(dǎo)致其體積遭到大量的消失,具體表現(xiàn)為巖石圈的顯著減薄,克拉通基本構(gòu)造格局的改變,大規(guī)模巖漿作用的發(fā)生。華北克拉通是中國(guó)最大、最古老的克拉通陸塊,也是全球最古老的陸核之一。它不僅保留了前寒武紀(jì)克拉通演化的重要記錄,也經(jīng)歷了中生代至早新生代克拉通的重大破壞,具體表現(xiàn)為巖石圈從西往東的顯著減薄,這使其成為了研究克拉通演化和破壞的典型實(shí)例。大量研究表明,華北克拉通大陸巖石圈的厚度從大于200 km減薄至小于100 km,在克拉通東部地區(qū)甚至減薄至60～80km,并經(jīng)歷了古老的大陸巖石圈地幔在減薄后被年輕的新生大陸巖石... 

【文章頁(yè)數(shù)】：334 頁(yè)

【學(xué)位級(jí)別】：博士

【文章目錄】：
Abstract
詳細(xì)中文摘要
Chapter 1: General introduction
    1.1 Research background
    1.2 Previous studies and existing controversies
        1.2.1 Previous studies
        1.2.2 Existing controversies
    1.3 Research targets
        1.3.1 Research objectives and approaches
        1.3.2 Completed workload
Chapter 2: Geological background
    2.1 eastern North China Craton (Shandong Peninsula)
        2.1.1 Yishui domain
        2.1.2 Juxian domain
        2.1.3 Junan domain
    2.2 northern North China Craton (North Hebei Province)
        2.2.1 Chicheng basin
    2.3 central North China Craton (North Taihang Mountain)
        2.3.1 Zhijiazhuang skarn iron deposit
Chapter 3: Methodology
    3.1 Petrology
    3.2 Zircon U-Pb geochronology
    3.3 Zircon Lu-Hf isotopes
    3.4 Whole-rock geochemistry
    3.5 Apatite fission track thermochronology
    3.6 Apatite U-Pb geochronology
    3.7 Thermal history modeling
Chapter 4: Late Mesozoic magmatism in the eastern North China Craton
    4.1 Introduction
    4.2 Sample description
        4.2.1 Yishui domain
        4.2.2 Juxian domain
        4.2.3 Junan domain
    4.3 Petrography
        4.3.1 Yishui domain
        4.3.2 Juxian domain
        4.3.3 Junan domain
    4.4 Results
        4.4.1 Zircon morphology and U-Pb geochronology
        4.4.2 In situ zircon Hf isotopic analyses
        4.4.3 Whole-rock geochemistry
    4.5 Discussion
        4.5.1 Petrogenesis of intrusive and volcanic rocks
        4.5.2 Implications of zircon U-Pb age data and Lu-Hf data
        4.5.3 Implications for craton destruction and lithospheric thinning
    4.6 Conclusions
Chapter 5: Late Mesozoic volcanism in the northern North China Craton
    5.1 Introduction
    5.2 Sample description
    5.3 Results
        5.3.1 Zircon U-Pb dating
        5.3.2 Zircon Hf isotopes
        5.3.3 Whole-rock geochemistry
    5.4 Discussion
        5.4.1 Petrogenesis of the Chicheng rhyolitic rocks
        5.4.2 Magma source of the Chicheng rhyolitic rocks
        5.4.3 Mesozoic volcanism in the North Hebei Province
        5.4.4 Implications for tectonic setting and craton destruction
    5.5 Conclusions
Chapter 6: Late Mesozoic magmatism in the central North China Craton
    6.1 Introduction
    6.2 Deposit geology and samples
        6.2.1 Deposit geology
        6.2.2 Samples
    6.3 Results
        6.3.1 Zircon U-Pb dating
        6.3.2 Zircon Hf isotopes
        6.3.3 Whole-rock geochemistry
    6.4 Discussion
        6.4.1 Petrogenesis and magma evolution
        6.4.2 Magmatic and metallogenic episode
        6.4.3 Tectonic implications for craton destruction
        6.4.4 Metallogenesis correlation with craton destruction
    6.5 Conclusions
Chapter 7: Meso-Cenozoic exhumation history in the eastern North China Craton
    7.1 Introduction
    7.2 Samples
    7.3 Results
        7.3.1 Apatite U-Pb geochronology
        7.3.2 Apatite fission track thermochronology
        7.3.3 Thermal history modeling
    7.4 Discussion
        7.4.1 Apatite U-Pb geochronology
        7.4.2 Apatite fission track thermochronology
        7.4.3 Implications for lithospheric destruction
    7.5 Conclusions
Chapter 8: Regional correlations and major conclusions
    8.1 Regional correlations
        8.1.1 Magmatic zircon ages
        8.1.2 Magmatic zircon isotopic linkages
        8.1.3 Whole-rock geochemical signature
        8.1.4 Multiple tectonic events
    8.2 Major conclusions
        8.2.1 Late Mesozoic magmatic evolution of the eastern China
        8.2.2 Meso-Cenozoic exhumation evolution of the eastern China
Acknowledgements
References
Appendix Ⅰ: Analytical Data
Appendix Ⅱ: Author Information


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