| 鄂尔多斯盆地西北部中奥陶统斑状白云岩成因研究 |
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| 引用本文： | 何小会,董兆雄,张文涛,游万江,吴涛,李高照.鄂尔多斯盆地西北部中奥陶统斑状白云岩成因研究[J].四川地质学报,2012(4):393-396. |
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| 作者姓名： | 何小会 董兆雄 张文涛 游万江 吴涛 李高照 |
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| 作者单位： | [1]西南石油大学资源与环境学院,成都610500 [2]东方地球物理勘探有限公司采集技术支持部,河北涿州072750 |
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| 摘 要： | 在鄂尔多斯盆地西北部,中奥陶统桌子山组和马五段到马三段斑状白云岩广泛分布。通过岩石、矿物学及地球化学特征研究,发现该白云岩具有岩溶、生物遗迹、深埋藏的证据,其原岩是早成岩阶段浅埋藏环境下形成的粉晶~细晶白云岩,在晚成岩阶段深埋藏环境下发生差异白云石化,形成细~粉晶白云石组成的斑块。因此,细晶~粗粉晶斑状白云岩受生物影响,是表生岩溶作用和深埋藏环境导致的差异白云石化作用的产物。
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| 关 键 词： | 斑状白云岩 粉晶~细晶白云岩 差异白云石化 鄂尔多斯 |
On Genesis of the Middle Ordovician Patchy Dolomitite in the Northwest Ordos Basin |
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| HE Xiao-hui,DONG Zhao-xiong,ZHANG Wen-tao,YOU Wan-jiang,WU Tao,LI Gao-zhao.On Genesis of the Middle Ordovician Patchy Dolomitite in the Northwest Ordos Basin[J].Acta Geologica Sichuan,2012(4):393-396. |
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| Authors: | HE Xiao-hui DONG Zhao-xiong ZHANG Wen-tao YOU Wan-jiang WU Tao LI Gao-zhao |
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| Institution: | 1-College of Resources and Environment, Southwest Petroleum University, Chengdu, 610500; 2-Acquisition Technical Support Department, Bureau of Geophysical Prospecting, Zhuozhou, Hebei 072750) |
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| Abstract: | The Middle Ordovician patchy dolomitite is widely exposed in the Northwest Ordos basin. Lithologic, mineralogical and geochemical studies indicate that the protolith was a crystal powder dolomite-aplite dolomite in the exogenetic stage with patchy aplite dolomite- crystal powder dolomite resulted from differential dolomitization in late diagenetic stage. |
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| Keywords: | patchy dolomitite crystal powder dolomite-aplite dolomite differential dolomitization Ordos basin |
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