globalchange  > 过去全球变化的重建
DOI: 10.1016/j.palaeo.2013.04.008
论文题名:
Changing environmental conditions in recent past - Reading through the study of geochemical characteristics, magnetic parameters and sedimentation rate of mudflats, central west coast of India
作者: Singh K.T.; Nayak G.N.; Fernandes L.L.; Borole D.V.; Basavaiah N.
刊名: Palaeogeography, Palaeoclimatology, Palaeoecology
ISSN: 0031-0182
出版年: 2014
卷: 397
起始页码: 61
结束页码: 74
语种: 英语
英文关键词: Creek ; Estuary ; Magnetic susceptibility ; Metals ; Sedimentation rate
英文摘要: Geochemical (sediment components, major and trace metals), magnetic related parameters (concentration, mineralogy and grain size) and radionuclide (210Pb) analyses were carried out on sediment cores collected from mudflat regions of central west coast of India viz, Kolamb creek (Malvan), Mandovi estuary (Panaji) and Tadri creek (Gokarn), in order to study the variations in sediment characteristics with time. The changes in spatial and temporal (depth) distributions of sediment composition were observed to be mainly controlled by the catchment area geology, geomorphology and anthropogenic activities. The sedimentation rate in the study area varied from 0.13 to 2cm/yr. The rate was extremely low at the lower half of the cores (0.13-0.31cm/yr, before ~1980) as compared to the near surface (1.21-2cm/yr, after ~1980) with two clear phases of sedimentation rates. The higher sedimentation rate in the upper portions of the cores was found to correspond to increased deposition of finer sediment components, metals and magnetic minerals which in turn were found to be mainly controlled by geology and/or human activities. The results of the present study reveal variations in sediment properties with time and support the use of geochemical in addition to magnetic susceptibility parameters on mudflats to understand changing environmental conditions of recent past. © 2013 Elsevier B.V.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/69439
Appears in Collections:过去全球变化的重建

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作者单位: Department of Marine Sciences, Goa University, Goa-403206, India; Atomic Mineral Division, Bangalore, India; Rted. Scientist National Institute of Oceanography, Goa, India; Indian Institute of Geomagnetism, New Panvel, Navi Mumbai-410218, India

Recommended Citation:
Singh K.T.,Nayak G.N.,Fernandes L.L.,et al. Changing environmental conditions in recent past - Reading through the study of geochemical characteristics, magnetic parameters and sedimentation rate of mudflats, central west coast of India[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2014-01-01,397
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