在地球化学领域中，直接解决沉积层序和早期成岩时代的定年问题长期以来被证明是具有挑战性的问题之一。
In the field of isotopic geochemistry, direct dating of sedimentary sequences and early-stage diagenesis has long been proved to be one of the challenging problems.
研究表明，砂岩层内的早期成岩作用(压实、压溶、胶结和交代作用)使孔隙度和渗透性降低。
Researches show that in the early stage of sandstone diagenesis, compaction, pressure solution, cementation and replacement reduce both the porosity and the permeability.
本文分析了中国首次南大洋考察的部分资料，探讨了南极马克斯韦尔湾沉积有机质的某些早期成岩特征。
Some characteristics in the process of early diagenesis of sedimentary organic matters are discussed, based on the information obtained from the First Antarctic Exploration of China.
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