本文選題：大匯聚 + 地形倒轉(zhuǎn)�。� 參考：《海洋地質(zhì)與第四紀地質(zhì)》2017年04期

【摘要】：東亞長期處于古亞洲洋、特提斯洋和古太平洋三大構(gòu)造域的大匯聚構(gòu)造背景之下。印支運動后,東亞東緣形成了統(tǒng)一的被動大陸邊緣,隨著晚三疊世古太平洋板塊俯沖的啟動,東亞東緣的被動大陸邊緣轉(zhuǎn)化為主動大陸邊緣,發(fā)育了與俯沖相關(guān)的蛇綠巖、I型花崗巖。晚三疊世—中侏羅世,古太平洋俯沖帶持續(xù)向西遷移,板塊俯沖產(chǎn)生的擠壓應(yīng)力影響到了東亞內(nèi)部,發(fā)生廣泛構(gòu)造變形,構(gòu)造體制從受E—W向特提斯構(gòu)造域和古亞洲洋構(gòu)造域控制逐漸向受NE向的古太平洋構(gòu)造域控制轉(zhuǎn)變。晚侏羅世—早白堊世早期(160~135 Ma),古太平洋板塊繼續(xù)西進,東亞被擠壓-走滑的應(yīng)力場控制,安第斯型主動大陸邊緣和華北東部高原最終形成,發(fā)育少量的埃達克巖。早白堊世晚期(135~90 Ma),古太平洋俯沖帶向東后撤,東亞陸緣由擠壓-走滑應(yīng)力場轉(zhuǎn)變?yōu)槔瓘?走滑應(yīng)力場,安第斯型大陸邊緣被破壞,華北東部高原開始垮塌,伴隨大量的埃達克巖、變質(zhì)核雜巖的出現(xiàn)。在晚白堊世,隨著俯沖帶的后撤,東亞內(nèi)部伸展作用減弱。新生代東亞發(fā)生了巨型的地形倒轉(zhuǎn),印度板塊與歐亞板塊碰撞最終導(dǎo)致中國西部的青藏高原隆升,相反,中國東部渤海灣盆地和海區(qū)的盆地群形成;構(gòu)造-盆地-巖漿帶體現(xiàn)出自西向東遷移的特征,盆地群起始時代主要在古近紀,形成了新生代西高東低的臺階式地貌格局。在新近紀盆地群由斷陷轉(zhuǎn)為快速拗陷,同時東亞內(nèi)部的伸展構(gòu)造主要受青藏高原隆起制約。
[Abstract]:East Asia has long been in the large converging tectonic setting of the ancient Asian Ocean, the Tethys ocean and the ancient Pacific. After the Indosinian movement, the east edge of East Asia formed a unified passive continental margin. With the initiation of the late three fold subduction of the paleo Pacific plate, the passive large land edge of East Asia was transformed into the active continental margin and developed and subducted in the eastern margin of East Asia. The associated ophiolite and I type granite. The late three fold and Middle Jurassic, the paleopacific subduction zone continued to migrate westward, and the compression stress caused by the subduction of the plate affected the interior of East Asia, and the tectonic system was gradually controlled from the E to the Tethys tectonic domain and the Gu Yazhou ocean tectonic domain to the NE paleopacific structure. The transition of domain control. The late Jurassic Early Cretaceous (160~135 Ma), the paleo Pacific plate continued westward, East Asia was controlled by compression and strike stress field, the Andean active continental margin and the eastern North China Plateau formed, developed a small amount of AAQ rock. The early Cretaceous late period (135~90 Ma), the ancient Pacific subduction zone withdrew eastward, East Asia land. The reason is that the extrusion strike slip stress field is transformed into tension and strike slip stress field, the Andean continental margin is destroyed, the eastern North China Plateau begins to collapse, with a large number of adakic rocks and metamorphic core complexes. In the late Cretaceous, the extension of East Asia weakened with the withdrawal of the subduction zone. The Cenozoic East Asia has undergone giant topographic reversals. The collision of the degree plate and the Eurasian plate eventually leads to the uplift of the Qinghai Tibet Plateau in Western China. On the contrary, the basin group of the Bohai Bay Basin and the sea area in eastern China is formed; the tectonic basin magma belt is characterized by the migration of the west to the East, and the initial period of the basin group is mainly in the Paleogene, forming a new high east low geomorphic pattern. The basins in the Neogene are converted from the fault depression to the fast depression, while the extensional structures in East Asia are mainly restricted by the uplift of the Qinghai Tibet Plateau.
【作者單位】： 海底科學(xué)與探測技術(shù)教育部重點實驗室中國海洋大學(xué)海洋地球科學(xué)學(xué)院;青島海洋科學(xué)與技術(shù)國家實驗室海洋地質(zhì)功能實驗室;
【基金】：國家重點研發(fā)計劃項目(2017YFC0601401,2016YF C0601002) 國家自然科學(xué)基金杰出青年基金(41325009);國家自然科學(xué)基金項目(41402172,41190072,41502185,41502321和U1606401) 山東省泰山學(xué)者特聘教授項目 鰲山卓越科學(xué)家計劃(2015ASTP-0S10 國家海洋局重大專項(GASI-GEOGE-01)
【分類號】：P542

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