Optical properties of Scolecodonts and their use as indicators of thermal maturity |
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| Authors: | F. Goodarzi A.C. Higgins |
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| Affiliation: | 1. Jiangsu Province Key Laboratory for Inflammation and Molecular Drug Target, Department of Occupational Medicine and Environmental Toxicity, School of Public Health, Nantong University, Nantong, Jiangsu Province, People’s Republic of China;2. Department of Nutrition and Food Hygiene, School of Public Health, Nantong University, Nantong, Jiangsu Province, People’s Republic of China;3. Department of Pathology, Medical College, Nantong University, Nantong, Jiangsu Province, People’s Republic of China;1. Yunnan Key Laboratory for Palaeobiology, Yunnan University, Kunming 650091, China;2. State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology, CAS, Nanjing 210008, China;1. Department of Plastic Surgery, Faculty of Medicine, Oita University, 1-1 Idaigaoka, Hasama-machi, Yufu-shi, Oita 879-5593, Japan;2. Department of Dermatology, Faculty of Medicine, Oita University, 1-1 Idaigaoka, Hasama-machi, Yufu-shi, Oita 879-5593, Japan;3. Department of Biochemistry, Faculty of Medicine, Oita University, 1-1 Idaigaoka, Hasama-machi, Yufu-shi, Oita 879-5593, Japan;4. Laboratory of Clinical Biochemistry, School of Pharmacy, Tokyo University of Pharmacy and Life Sciences, 1432-1 Horinouchi, Hachioji, Tokyo 192-0392, Japan |
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| Abstract: | Dispersion of reflectances in air and oil between 400 and 700 nm of a suiteof scolecodont concentrates with known Conodont Alteration Index was determined using a reflected light microscope. Refractive and absorptive indices of these scolecodonts were calculated using their determined reflectances.Morphologically, scolecodonts in carbonate show similar granular morphology to that of graptolites. Fine structural details of scolecodonts can be observed under reflected light.Reflectances, refractive and absorptive indices of scolecodonts at 546 nm increase with increase of the Conodont Alteration Index, indicating that these properties of scolecodonts can be used to determine the maturity of sediments.Dispersion of the optical properties of scolecodonts follows similar trends to those for vitrinite, natural bitumen and graptolites, indicating similar molecular structural changes with increasing maturity. |
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| Keywords: | Scolecodonts reflected light optical properties morphology |
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