Classification and Age Estimation of Fossil Shells from Ban Sap Noi Geopark in Thailand, through the Material Characterization Techniques
บทความในวารสาร
ผู้เขียน/บรรณาธิการ
กลุ่มสาขาการวิจัยเชิงกลยุทธ์
รายละเอียดสำหรับงานพิมพ์
รายชื่อผู้แต่ง: Pongtornkulpanich S.; Naemchanthara P.; Faksawat K.; Kaewwiset W.; Limsuwan P.; Naemchanthara K.
ผู้เผยแพร่: Springer
ปีที่เผยแพร่ (ค.ศ.): 2025
Volume number: 40
Issue number: 3
หน้าแรก: 635
หน้าสุดท้าย: 643
จำนวนหน้า: 9
นอก: 1000-2413
eISSN: 1993-0437
ภาษา: English-Great Britain (EN-GB)
บทคัดย่อ
The fossil shells on the sedimentary rocks were collected from The Historical Park, Ban Sap Noi Geopark, Phetchabun Province, Thailand. However, the fossils remained in this area were investigated on the characteristic species only in geological studies with taxonomy for fossil age predicting. To fill up the gap of these studies, the material characterization techniques were used to study the chemical composition and structure of fossil shells I, II and III. The results clearly showed that the morphologies of all fossil shells were Brachiopod fossils with different species. The functional group and elemental composition of all fossil shells showed that the high content of calcium carbonate was a major composition. In addition, the high content of quartz indicated the silica precipitation phenomenon in all fossil shells. The element composition of cross-sectional morphology and energy dispersive spectroscope (EDS mapping) were used to confirm the presence of Si element in each zone of fossil shells. The crystal structures of all fossil shells were investigated and indicated that the calcium carbonate compound was a calcite phase and silicon dioxide compound was a quartz phase. Moreover, the crystal structure of quartz phase was used to calculate the crystallinity index. The crystallinity index values in all fossil shells indicated a well-crystallized quartz. The age of fossil shells was estimated and found to be brachiopod fossil in carboniferous period with the age of about 359.2 to 299.0 million years. © Wuhan University of Technology and Springer-Verlag GmbH Germany, Part of Springer Nature 2025.
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