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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2019.1
- 수록면
- 951 - 960 (10page)
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초록· 키워드
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Major and trace elements, including rare earth elements (REEs) geochemistry of bed sediments from the lower reaches of Krishna river suggest their origin mainly from weathering of Deccan basalts and Precambrian rocks of the southern India. The elemental compositions indicate evidence of sedimentary sorting during weathering, transportation and deposition. Highly depleted Na2O and high values of Chemical Index of Alteration (CIA) are suggestive of moderate to strong chemical weathering environment in lower reaches of Krishna river. Major, trace and REE concentrations of bulk sediments suggest marginal variations in relative contribution from mafic and felsic minerals. The bed sediments contain significantly low concentrations of trace elements like Ba, Sr, La, Ce and Nd and moderately low concentrations of V, Zr, Rb, Zn, Ni and Cr relative to upper continental crust (UCC) composition. Most of the other trace elements and REEs are almost similar to UCC indicating their origin from weathering of mixed rock types in catchment areas of Krishna river. Strong relationships of ΣREEs with Ti and Zr in bed sediments suggest that REEs are mainly controlled by heavy minerals such as titanite and zircon. A marked increase in REEs in clay fractions of sediments indicates their adsorption and/or substitution on clay lattice.
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참고문헌 (50)
참고문헌 신청
Ahmad, T. / 1998 / Geochemical characteristics of water and sediment of the Indus river, Trans-Himalaya, India : constraints on weathering and erosion / Journal of Asian Earth Sciences 16:333~346
Alexander, P. O. / 1977 / Rare earth abundances in Deccan trap basalts / Lithos 10:143~147
Alexander, J. / 2001 / Fluvial geochemistry through a short-duration tropicalcyclone induced discharges event in the Burdekin River and Hann Creek, North Queensland, Australia / Aquatic Geochemistry 7:275~293
Andersson, K. / 2005 / Colloidal rare earth elements in a boreal river : changing sources and distribution during the spring flood / Geochimica et Cosmochimica Acta 70:3261~3274
Biksham, G. / 1991 / Heavy Metal distribution in the Godavari River Basin / Environmental Geology and Water Sciences 17:117~126
Alexander, P. O. / 1977 / Rare earth abundances in Deccan trap basalts / Lithos 10:143~147
Alexander, J. / 2001 / Fluvial geochemistry through a short-duration tropicalcyclone induced discharges event in the Burdekin River and Hann Creek, North Queensland, Australia / Aquatic Geochemistry 7:275~293
Andersson, K. / 2005 / Colloidal rare earth elements in a boreal river : changing sources and distribution during the spring flood / Geochimica et Cosmochimica Acta 70:3261~3274
Biksham, G. / 1991 / Heavy Metal distribution in the Godavari River Basin / Environmental Geology and Water Sciences 17:117~126
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