...聚煤规律；石炭—二叠系；贺兰山—桌子山 [gap=1794]Keywords : high-resolution sequence stratigraphy; dynamic simulation; coal accumulation; CarboniferousPermian; HelanshanZhuozishan area..
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...聚煤作用；正常海退；强制性海退 [gap=2119]ds : Ordos Basin；Carboniferous-Permian coal measures；paleogeographic evolution；coal accumulation；normal regression；forced regression ..
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The coal accumulation process took place during their certain periods.
聚煤作用发生在特定的演化阶段。
This paper analyses the coal accumulation characteristics of every depositional environments.
总结了不同沉积环境的聚煤特点。
The coalbed and coal - rich zone was an effects which the factor of coal accumulation process systematic action.
煤层和富煤带的形成是聚煤作用因素系统作用的结果。
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