本文選題：氣候冰川 + 沉積　； 參考：《沉積學(xué)報》2016年04期

【摘要】：中國邊緣海大陸架在晚更新世時期曾是海岸平原,在古長江、古黃河泥沙填充下形成了陸架堆積體,并在全新世發(fā)育了南黃海輻射沙脊群、廢黃河三角洲和長江三角洲。根據(jù)點狀的地質(zhì)鉆孔分析和重建,對南黃�！K海岸的沉積體系的分布和變化機制尚不明了。作為動力機制探討,基于氣候—海面—沉積系統(tǒng),根據(jù)氣候水文學(xué)、沉積學(xué)原理以及泥沙沉積面的動態(tài)高程計算,構(gòu)建了氣候冰川驅(qū)動—東黃海地海系統(tǒng)響應(yīng)—河流沉積建造的數(shù)值模式,模擬了14萬年、4萬年和1萬年不同時間尺度江蘇海岸線和長江三角洲沉積的變化過程和分布,進而對冰川氣候、構(gòu)造沉降、沉積壓實等復(fù)雜效應(yīng)下的海面特征、陸源泥沙沉積和海岸線進行分析。模擬結(jié)果與地質(zhì)鉆孔資料揭示的層序和埋深能夠進行對比。
[Abstract]:In the late Pleistocene, the continental shelf of the marginal sea in China was the coastal plain. In the paleo-Yangtze River, the paleo-Yellow River was filled with sediment to form the continental shelf accumulations, and in the Holocene, the South Huang Hai radiative sand ridge group, the abandoned Yellow River Delta and the Yangtze River Delta were developed. Based on the analysis and reconstruction of the point geological boreholes, the distribution and variation mechanism of the sedimentary system along the southern Huang Hai-Jiangsu coast is still unclear. As a dynamic mechanism, based on the climate, sea surface and sediment system, the dynamic elevation of sediment surface is calculated according to climatic hydrology, sedimentology and dynamic elevation of sediment surface. A numerical model of climate glacier-driven response to fluvial deposition in the East Huang Hai Geosphere-Seas system is constructed. The variation process and distribution of Jiangsu shoreline and Yangtze River Delta deposits at different time scales of 140,000 years, 40,000 years and 10,000 years are simulated. Furthermore, the sea surface characteristics, continental sediment deposits and shoreline are analyzed under the complex effects of glacier climate, tectonic subsidence and sedimentary compaction. The simulation results can be compared with the sequence and buried depth revealed by geological borehole data.
【作者單位】： 中國科學(xué)院南京地理與湖泊研究所;中國科學(xué)院大學(xué);安徽師范大學(xué)環(huán)境科學(xué)與工程學(xué)院;
【基金】：國家重點基礎(chǔ)研究發(fā)展計劃(973計劃)項目(2013CB956501;2012CB956103) 中科院國際合作計劃(CAS/SAFEA KZZD-EW-TZ-08-3)~~
【分類號】：P736.2
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本文編號：1900246