CAJ | 학술논문

本文在收集大量菊花石标本的基础上，通过岩石薄片镜下鉴定及X射线衍射分析，识别了华南地区栖霞组菊花石假象内矿物的成因类型，建立了矿物交代序列，并通过对菊花石假象内各种矿物成分的电子探针分析和对交代方解石、脉方解石及其围岩的氧、碳同位素分析，探讨了菊花石交代过程中的成岩环境变化，合理地解释了菊花石内正延性玉髓和栖霞组内海泡石的成因。
본문재수집대량국화석표본적기출상，통과암석박편경하감정급X사선연사분석，식별료화남지구서하조국화석가상내광물적성인류형，건립료광물교대서렬，병통과대국화석가상내각충광물성분적전자탐침분석화대교대방해석、맥방해석급기위암적양、탄동위소분석，탐토료국화석교대과정중적성암배경변화，합리지해석료국화석내정연성옥수화서하조내해포석적성인。
Chrysanthemum_shaped celestite is a diagenetic nodule widelydistributed in the Permian Chihsia Formation of South China. As precipitated in the very early diagenesis and replaced by subsequent diagenesis, most of the celestite nodules are pseudomorphs dominantly composed of calcite, chalcedony and minor dolomite. This paper deals with the establishment of a replacement succession in the pseudomorph and the evolution of related diagenetic environments. The replacement initiated in very early diagenesis by fine cloudy calcite, followed by length_slow chalcedony and fine granular calcite. The last two components originated respectively from an episode of chalcedony veining and a calcite veining. Celestite was also noted replaced directly by chalcedony. These replacements took place in fluids rich in silica and Mg2+, revealed by microprobe analyses on the replacement calcite and the occurrence of length_slow chalcedony. Chert nodules and sepiolite in the host rock were contemporary. Late replacements include euhedral calcite crystals in the chalcedony and coarse granular calcite that stemmed from an episode of calcite veining, resulting from diagenetic fluids with relative low Mg2+/Ca2+ ratio.