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河南汝州、鲁山一带罗圈组冰积层之上的东坡组以页岩、粉砂质页岩及粉砂岩为主.笔者发现了东坡组夹有白云岩透镜体及白云质粉砂岩、砂岩.白云质粉砂岩具有与东坡组页岩不协调的软沉积变形.白云岩透镜体和白云质粉砂岩具有明显的δ13C负偏.白云岩透镜体的δ13C为-4.19‰～-6.18‰.白云质粉砂岩的δ13C大部分为-2‰～-4‰之间.因此认为,东坡组的白云岩透镜体及白云质粉砂岩、砂岩与华南震旦纪盖帽白云岩及南华纪Sturtian冰期冰积层之上的碳酸盐丘和菱锰矿类似,为冰积层中的天然气水合物泄漏释放的CO2和海水中的Mg2+发生快速反应快速沉淀而成的,即东坡组的白云岩、白云质粉砂岩、砂岩为冷泉成因.
The Dongpo Formation over the Luzhu Formation ice accumulation in the Ruzhou and Lushan Mountains of Henan Province is dominated by shale, silt shale and siltstone. The authors found that dolomite lenses and dolomitic siltstone , And the sandstone.The dolomitic siltstone has the incompatible soft sedimentary deformation with the shale of the Dongpo Formation.The dolomite and dolomitic siltstone have a significant δ13C negative bias.Theδ13C of the dolomite lens is -4.19 ‰ -6.18 ‰. The majority of δ13C in the dolomitic siltstone is between -2 ‰ and -4 ‰, so it is considered that dolomite lens, dolomitic siltstone and sandstone in the Dongpo Formation and Sinian cap dolomite in South China and South China Sea Carbonates in the Sturtian glacial layer are similar to rhodochrosite, resulting from the quick reaction of CO2 released from gas hydrate leakages in sea ice and quick recovery of Mg2 + in seawater, ie dolomite in the Dongpo Formation, The dolomitic siltstone and sandstone are the origin of cold springs.