摘要
古沟槽为风化壳表面被水流侵蚀切割而成的岩溶地表水和地下水的排泄通道。受古构造、岩性、古气候和古水动力场的控制,古沟槽的分布表现出放射状成排发育的特点,总趋势与古地形倾斜方向一致。构造特征基本决定了大的古沟槽呈近东西向展布的格局;云灰坪、泥云坪微相带中的白云岩发育构成了奥陶系岩溶盆地古沟槽发育的物质基础;中、晚奥陶世-早、中石炭世半干旱亚湿润-潮湿温带气候条件是沟槽发育的重要保障;古水文地质特点是古沟槽分布的主要控制因素。
Eroded karst flute is drainage channel of karst upland water and underwater eroded by waterflow. The distribute of flute have the characteristic with radiation and alignment development controled by palaeostructure ,lithology,palaeoclimateand palaeohydrodynam-- ic condition,the tendency of flute accordance with vergence direction of palaeot-- opography. Structural feature essentially decided latitudinal format , dolomite in dolomitic--limestone and mud -- dolomitic flat microfacies constituted the material base of Ordovician eroded karst flute in ordos basin, semiarid subhumid and wetting temperate climate in middle--late Ordovician and early--middle Carboniferous is significant guarantee of flute, the characteristic of palaeohydrodynamie condition is the main control factor of distribution.
出处
《内蒙古石油化工》
CAS
2008年第16期110-112,共3页
Inner Mongolia Petrochemical Industry
关键词
古沟槽
奥陶系
风化壳
鄂尔多斯盆地
Eroded Karst Flute
Ordovician
Weathered Crust
Ordos Basin
