| 桐柏—大别山掀斜隆升对长江中游环境的影响 |
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| 引用本文： | 李长安.桐柏—大别山掀斜隆升对长江中游环境的影响[J].地球科学,1998,23(6):562-566. |
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| 作者姓名： | 李长安 |
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| 作者单位： | 中国地质大学地球科学学院 |
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| 摘 要： | 桐柏－大别山自早更新世晚期以来，不断发生着自北向南的掀斜隆升，从而对长江中游的环境，尤其是水系的演化产生了严重影响。主要表现在：鄂西各东西向河流的阶地高差自北向南逐渐降低；江汉平原水系同步向南发生异常弯曲，长江主河道不断南移，湖相沉积范围也由北向南收缩和迁移；鄂东长江两岸水系和河谷地貌发育不对称，长江主河道紧逼南岸丘陵区。现代地壳形变资料表明：桐柏－大别山的掀升作用仍在继续，由此引起的环境问题还将
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| 关 键 词： | 掀斜隆升 长江中游环境 水系演化 桐柏－大别山 |
EFFECT OF TILTED UPLIFT OF TONGBAI_DABIE MOUNTAINS ON MIDDLE YANGTZE RIVER ENVIRONMENT |
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| Li Chang''''an.EFFECT OF TILTED UPLIFT OF TONGBAI_DABIE MOUNTAINS ON MIDDLE YANGTZE RIVER ENVIRONMENT[J].Earth Science-Journal of China University of Geosciences,1998,23(6):562-566. |
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| Authors: | Li Chang'an |
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| Abstract: | Since the late period of Early Pleistocene Tongbai_Dabie Mountains have been uplifting and tilting from north to south, which affects the middle Yangtze River environment, especially greatly affects the drainage systems evolution and development. The main effects are: (1) drainage systems flowing in Jianghan Plain take a bend synchronously to the south; (2) the main channel of Yangtze River have been migrating southward; (3) the range of lacustrine deposit has been narrowing and migrating southward, and (4) the drainage systems and river valley landforms of Yangtze River evolution are not symmetric, broad concave flood plain in the north bank and hilly rock land in the south bank, in southeastern Hubei Province, and the main flowing line of the Yangtze River close to its south bank. Modern measurement of the crust deformation indicates that the uplift tilting from north to south is happening in Tongbai_Dabie Mountains, and its effect on environment will continue too. The paper suggests that the uplift tilting from north to south can be a mechanism of China central mountain systems (Kunlun_Qinling_Dabie Mountain systems). |
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| Keywords: | tectonic tilting uplift middle Yangtze River environment drainage systems evolution and development Tongbai_Dabie Mountains |
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