東海陸架盆地南部中生代成盆過程的數(shù)值模擬
[Abstract]:The I2VIS finite difference method is used to simulate the Mesozoic basin evolution in the southern shelf basin of the East China Sea. The construction of the numerical model is mainly based on the Mesozoic stratigraphic characteristics obtained from the existing seismic profiles, logging, tomography and other data in the study area. Based on the simulation results, the known characteristics of magmatic intrusion and fault assemblage are compared, and the magmatic faults and sedimentary characteristics of basin evolution in different stages under different boundary conditions are quantitatively analyzed, and the main factors affecting the tectonic characteristics of the basin are discussed. The following conclusions are obtained: (1) by changing the boundary conditions of the model, it is found that the layered water-bearing mantle will destroy the crustal structure in the extensional environment. The regional extension of the Mesozoic East China Sea shelf basin is not the only dominant factor in the evolution of the basin. (2) the Mesozoic basin formation process and its attributes are closely related to the Mesozoic upper mantle material flow. The massive magmatic events caused by the flow of mantle materials in the Minjiang sag are likely to act under the Minjiang sag. This resulted in the further uplift of Minjiang sag, the formation of the present slope zone, and the further subsidence of the Keelung sag, which formed the sedimentary center of the sag. Based on the above conclusions, it is considered that the Mesozoic evolution of the southern shelf basin of the East China Sea was influenced by two major factors, namely, regional extension and magmatic upwelling caused by the upper mantle material flow.
【作者單位】: 海底科學(xué)與探測(cè)技術(shù)教育部重點(diǎn)實(shí)驗(yàn)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(shí)驗(yàn)室海洋地質(zhì)過程與環(huán)境功能實(shí)驗(yàn)室;中國地質(zhì)調(diào)查局青島海洋地質(zhì)研究所;中國石油大學(xué);
【基金】:國家自然科學(xué)基金(41325009,41402172,41476053,41506080) 山東省泰山學(xué)者特聘教授項(xiàng)目 鰲山卓越科學(xué)家計(jì)劃(2015ASTP-0S10) 國家重點(diǎn)研發(fā)計(jì)劃項(xiàng)目(2016YFC060100)
【分類號(hào)】:P736.1
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