CAJ | 학술논문

珊瑚化石是珊瑚在地下长期埋藏经过各种地质作用所形成的化石，目前对珊瑚化石的研究主要集中在地质学和生物进化方面，对珊瑚化石的组成和显微结构研究较少。本文对产于陕西省的珊瑚化石采用X射线衍射分析、差热分析、热重分析以及扫描电镜等方法进行分析，研究珊瑚化石的组成、含量以及其显微结构特点。结果表明：这类开采于陕西省的珊瑚化石主要成分是碳酸钙（ CaCO3），平均含量高达98.6%；珊瑚化石在700℃左右发生相变，在相变过程中其质量急剧下降，即CaCO3分解为CaO和CO2；内部结构存在着大量的1~5μm孔隙；断口形貌具有类似解理断裂的特点，存在相应的“河流状花样”。本文提出，在珊瑚玉石储藏及加工时要尽量避开酸性物质，避免使其经受高温，最高不要超过650℃，同时加工琢磨刻面过程中要避开解理面，或使刻面与解理面呈一定角度。
산호화석시산호재지하장기매장경과각충지질작용소형성적화석，목전대산호화석적연구주요집중재지질학화생물진화방면，대산호화석적조성화현미결구연구교소。본문대산우합서성적산호화석채용X사선연사분석、차열분석、열중분석이급소묘전경등방법진행분석，연구산호화석적조성、함량이급기현미결구특점。결과표명：저류개채우합서성적산호화석주요성분시탄산개（ CaCO3），평균함량고체98.6%；산호화석재700℃좌우발생상변，재상변과정중기질량급극하강，즉CaCO3분해위CaO화CO2；내부결구존재착대량적1~5μm공극；단구형모구유유사해리단렬적특점，존재상응적“하류상화양”。본문제출，재산호옥석저장급가공시요진량피개산성물질，피면사기경수고온，최고불요초과650℃，동시가공탁마각면과정중요피개해리면，혹사각면여해리면정일정각도。
Coral fossil is formed by various geological effects while buried under the ground for a long time. Current research on coral fossils is focused mainly on the geological and biological evolution of the coral fossils,but less on their components and microstructure. X-ray Diffraction( XRD),Differential Thermal Analysis( DTA),Thermo-gravimetric Analysis( TG)and Scanning Electron Microscope( SEM)and other methods were conducted to determine composition,content and microstructure characteristics of coral fossil samples collected from Shanxi province. The results show that the coral fossils from Shanxi province are composed mainly of calcium carbonate (CaCO3),and the average content is as high as 98. 6%. Phase transition of coral fossils occurred at 700℃ with a sharp decline in the mass,namely the CaCO3 decomposed to CaO and CO2 . The internal structure of Coral fossils showed a large number of pores whose size is 1 -5 μm. Fracture morphology is the same as cleavage fracture, corresponding with‘river pattern’. Coral fossil storage and processing methods to avoid acidic substances and high temperature are described. The highest temperature is 650℃. It is important to avoid a cleavage plane or make an angle between a facet and cleavage plane during processing.