| 南黄海盆地及邻区中生代地层对比 |
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| 引用本文： | 龚建明.南黄海盆地及邻区中生代地层对比[J].海洋地质与第四纪地质,2002,22(3):83-91. |
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| 作者姓名： | 龚建明 |
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| 作者单位： | 青岛海洋地质研究所,青岛,266071 |
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| 摘 要： | 中生代地层广泛分布于南黄海盆地及邻区，包括胶莱盆地、苏北盆地、群山盆地、黑山盆地、庆尚盆地等。陆上和海域的三叠纪地层主要由灰岩组成。侏罗纪地层目前只发现陆上，主要由陆相碎屑岩组成，但从南黄海盆地某些地震剖面上可以看出，海域侏罗纪地层很可能存在。白垩纪地层在上述中生代盆地中分布最广，在许多钻井中，白垩纪地层的厚度在1000m以上，甚至2000m。其中，陆地上早白垩纪地层主要由暗色陆相碎屑岩组成，例如胶莱盆地的莱阳组、苏北盆地的葛村组，庆尚盆地的新洞群；而海域的早白垩纪地层通常由红色碎屑岩组成，例如，南黄海盆地东侧的Kachi-1和Inga-1井钻遇早白垩纪地层，其中Kachi-1井的早白垩纪地层为红褐色碎屑岩夹火山岩，而Inga-1井的早白垩纪地层为玄武岩。中白垩纪地层属氧化环境，岩石通常为红色或棕色。例如，胶莱盆地的王氏组、苏北盆地的浦口组和赤山组、庆尚盆地的河阳群。在南黄海盆地中，ZC7－2－1、Kachi-1和另外5口井均钻遇这套以红色为主的地层。苏北盆地和南黄海盆地的晚白垩纪地层称为泰州组，主要由暗色泥岩组成，而庆尚盆地的晚白垩纪地层称为榆川群，主要由火山岩组成。地层对比显示，南黄海盆地及邻区中生代地层具有东部沉积厚、西部沉积薄，东部沉积环境以氧化为主、岩石发红，西部以还原环境为主、岩石发暗，东部以火山岩为主、西部以碎屑岩为主的特征。
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| 关 键 词： | 地层分布 地层对比 南黄海盆地 中生代 地震剖面 侏罗纪 |
MESOZOIC STRATA CORRELATIONS OF THE SOUTH YELLOW SEA BASIN AND ITS ADJACENT AREAS |
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| GONG Jian-ming.MESOZOIC STRATA CORRELATIONS OF THE SOUTH YELLOW SEA BASIN AND ITS ADJACENT AREAS[J].Marine Geology & Quaternary Geology,2002,22(3):83-91. |
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| Authors: | GONG Jian-ming |
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| Abstract: | Mesozoic strata exist in the South Yellow Sea and its adjacent areas, including Jiaolai basin, Subei basin, South Yellow Sea basin, Kunsan basin, Heuksan basin, Gyeongsang basin etc. Triassic strata mainly consist of limestone discovered onshore and offshore. Jurassic strata are mainly composed of terrestrial clastic rocks discovered onshore only, but some seismic sections display that Jurassic strata may be present in the South Yellow Sea areas. Cretaceous strata are distributed widely, among which, onshore lower Cretaceous mainly consists of dark terrestrial detrital rocks such as Laiyang Formation of Jiaolai basin, Gecun Formation of Subei basin and Sindong Group of Gyeongsang basin, while offshore lower Cretaceous is usually composed of red clastic rocks; middle Cretaceous rocks are red or brown, belonging to oxidation environment, such as Wangshi Formation of Jiaolai basin, Pukou Formation and Chishan Formation of Subei basin, Hayang Group of Gyeongsang basin, Well ZC7 2 1?Well Kachi 1 and other 5 wells in the South Yellow Sea basin. upper Cretaceous is absent in Jiaolai basin, upper Cretaceous of Subei and South Yellow Sea basins are correspondent to Taizhou Formation composed of dark mudstone, while upper Cretaceous of Gyeongsang basin is correspondent to Yuchon Group composed of volcanic rocks.In a word, Mesozoic strata are characterized by thicker, red volc anic rocks in the east and thinner,dark clastic rocks in the west, especially in the South Yellow Sea basin. |
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| Keywords: | Mesozoic strata distribution correlation South Yellow Sea basin adjacent areas |
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