【摘要】：通過(guò)磷灰石裂變徑跡年齡的測(cè)定以及時(shí)間-溫度熱歷史的反演,揭示了秭歸盆地中新生代構(gòu)造-熱演化過(guò)程。結(jié)果表明:秭歸盆地自120 Ma左右開(kāi)始緩慢隆升,主要經(jīng)歷了3個(gè)強(qiáng)烈的隆升階段:(1)晚白堊世100~80 Ma開(kāi)始強(qiáng)烈隆升,是燕山期造山運(yùn)動(dòng)在該地區(qū)作用的結(jié)果,也可能是黃陵背斜晚白堊世強(qiáng)烈抬升向西延伸的響應(yīng);(2)晚始新世40 Ma的強(qiáng)烈隆升,可能是印度板塊和亞歐板塊碰撞初期作用的遠(yuǎn)程響應(yīng);(3)中新世中期到末期10~5 Ma的強(qiáng)烈隆升,是青藏高原東部邊界向東擴(kuò)展及亞洲季風(fēng)氣候變化的響應(yīng)。秭歸盆地內(nèi)部自白堊紀(jì)以來(lái)一直隆升剝蝕,展現(xiàn)出與盆地邊緣構(gòu)造-熱演化的差異。通過(guò)與黃陵背斜東部的當(dāng)陽(yáng)盆地構(gòu)造-熱事件的對(duì)比,暗示了黃陵背斜在晚白堊世已隆升剝露至地表,分割了兩個(gè)盆地。晚侏羅世—早白堊世,秦嶺大規(guī)模擠壓變形逆沖推覆構(gòu)造作用使得米倉(cāng)山—漢南隆起和黃陵背斜地區(qū)成為中上揚(yáng)子地區(qū)磷灰石裂變徑跡年齡相對(duì)最大的區(qū)域,江南—雪峰陸內(nèi)造山作用向西北方向的擴(kuò)展使得湘鄂西地區(qū)向川東地區(qū)磷灰石裂變徑跡年齡具有整體變年輕的趨勢(shì)。晚白堊世以來(lái)太平洋板塊俯沖擠壓效應(yīng)使得川東褶皺帶周緣及川東北磷灰石裂變徑跡年齡自南東向北西方向減小,江漢盆地、當(dāng)陽(yáng)盆地及龍泉山以西記錄的年輕的磷灰石裂變徑跡年齡則與青藏高原隆升及其向南東方向構(gòu)造逃逸的擠壓作用和亞洲季風(fēng)等氣候變化的影響有關(guān)。
[Abstract]:Through the determination of apatite fission track age and the inversion of time-temperature thermal history, the Meso-Cenozoic tectonic-thermal evolution process of Zigui Basin is revealed. The results show that the Zigui basin began to rise slowly from about 120 Ma and experienced three strong uplift stages: (1) the late Cretaceous 100 ~ 80 Ma began to uplift strongly, which was the result of Yanshanian orogenic movement in this area. It may also be a response to the strong uplift and westward extension of the Huangling anticline in the late Cretaceous. (2) the strong uplift of 40 Ma in the late Eocene may be the remote response of the early collision between the Indian plate and the Eurasian plate; (3) the strong uplift of 10 ~ 5 Ma from mid-Miocene to late Miocene is a response to the eastward extension of the eastern boundary of the Qinghai-Xizang Plateau and the change of the Asian monsoon climate. Zigui basin has been uplift and denuded since the Cretaceous, showing the difference between the tectonic and thermal evolution of the basin margin. By comparing with the tectonic-thermal events of the Dangyang basin in the east of the Huangling anticline, it is suggested that the Huangling anticline has been uplifted and exposed to the surface of the earth in the late Cretaceous, dividing the two basins. In the late Jurassic-early Cretaceous, the massive compressional deformation thrust nappe in the Qinling Mountains made the Mecangshan-Hannan uplift and the Huangling anticline the relatively largest apatite fission track ages in the middle and upper Yangtze regions. The spreading of intracontinental orogeny from Jiangnan to Xuefeng makes the fission track age of apatite in the west of Hunan and Hubei to the east of Sichuan become younger. Since the late Cretaceous, the subduction and compression effect of the Pacific plate has reduced the fission track ages of apatite in the eastern part of Sichuan and in the northeast of Sichuan, from south to north to west, and the Jianghan basin. The young apatite fission track ages recorded in the Dangyang Basin and west of Longquan Mountain are related to the uplift of the Qinghai-Xizang Plateau and the squeezing of southeastward tectonic escape and the influence of climate change such as the Asian monsoon.
【作者單位】： 中國(guó)地質(zhì)大學(xué)(武漢)構(gòu)造與油氣資源教育部重點(diǎn)實(shí)驗(yàn)室;中國(guó)地質(zhì)大學(xué)(武漢)資源學(xué)院;
【基金】：國(guó)家自然科學(xué)基金項(xiàng)目(41372140,40902038) 湖北省杰出青年基金項(xiàng)目(2016CFA055) 武漢市科技晨光計(jì)劃項(xiàng)目(2016070204010145) 中央高�；究蒲袠I(yè)務(wù)費(fèi)專項(xiàng)資金資助項(xiàng)目(CUG201536)
【分類號(hào)】：P314;P548

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