Kotoky, P.; Baruah, Baby; Borgohain, R. (1999) X-ray Diffraction, Infrared and Isotope Study of the Lakadong Limestone, Meghalaya. Journal Geological Society of India, 54 (4). 421-430 doi:10.17491/jgsi/1999/540411
| Reference Type | Journal (article/letter/editorial) | ||
|---|---|---|---|
| Title | X-ray Diffraction, Infrared and Isotope Study of the Lakadong Limestone, Meghalaya | ||
| Journal | Journal Geological Society of India | ||
| Authors | Kotoky, P. | Author | |
| Baruah, Baby | Author | ||
| Borgohain, R. | Author | ||
| Year | 1999 (October 1) | Volume | 54 |
| Page(s) | 421-430 | Issue | 4 |
| Publisher | Geological Society of India | Place | Bangaluru, India |
| URL | |||
| DOI | doi:10.17491/jgsi/1999/540411Search in ResearchGate | ||
| Generate Citation Formats | |||
| Classification | Not set | LoC | Not set |
| Mindat Ref. ID | 19368980 | Long-form Identifier | mindat:1:5:19368980:2 |
| GUID | 0 | ||
| Full Reference | Kotoky, P.; Baruah, Baby; Borgohain, R. (1999) X-ray Diffraction, Infrared and Isotope Study of the Lakadong Limestone, Meghalaya. Journal Geological Society of India, 54 (4). 421-430 doi:10.17491/jgsi/1999/540411 | ||
| Plain Text | Kotoky, P.; Baruah, Baby; Borgohain, R. (1999) X-ray Diffraction, Infrared and Isotope Study of the Lakadong Limestone, Meghalaya. Journal Geological Society of India, 54 (4). 421-430 doi:10.17491/jgsi/1999/540411 | ||
| In | (1999, October) Journal of the Geological Society of India Vol. 54 (4). Geological Society of India | ||
| Abstract/Notes | Abstract X-ray diffraction (XRD) and infrared (IR) spectral analyses of the Lakadong Limestone, Meghalaya indicate calcite as its dominant mineral phase. Association of dolomite at the base and presence of silica at the top of the sequence is evidenced from the spectra. A significant relationship between CaO content and the peak intensity of IR-spectra is found and needs standardisation before it can be utilised for rapid estimation of quality of limestone and can be an alternative for different time consuming analytical procedures. Stable isotope of d13C {0.63 to 1.12‰( av.0.87±0.01‰)} points to enrichment of heavier C isotope and d18O values {-7.34 to-10.55‰ (av.-9.06±0.01‰) ) to lighter O isotope enrichment. Isotopic grid analysis confirms the marine origin for the limestone. Biochemical fractionation along with diagenetic reorganisation might have played critical roles in controlling the isotopic ratios of this limestone. | ||
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