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Offshore sediments record the history of onshore iron ore mining in Goa State, India

DRS at CSIR-National Institute of Oceanography

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Title Offshore sediments record the history of onshore iron ore mining in Goa State, India
 
Creator Sebastian, T.
Nath, B.N.
Naik, Sangeeta
Borole, D.V.
Pierre, S.
Yazing, A.K.
 
Subject Geology and geophysics
Geology and geophysics
Geology and geophysics
Geology and geophysics
 
Description Environmental magnetic and geochemical analyses combined with 210Pb dating were carried out on a sediment core off Goa from Arabian Sea to reconstruct the sedimentation history of last three and a half centuries and to investigate the impact of onshore iron ore mining on the offshore sedimentation. A drastic increase in sedimentation rate and mineral magnetic concentration parameters divides the core into two units (1 & 2) at a depth of 41 cm (1982 CE). The high magnetic susceptibility values in Unit 1 sediments are coeval with increased iron ore production on land and illustrate the role of terrestrial mining on the increased offshore sedimentation. The early diagenetic signals were observed in Unit 2 of the core with low concentration parameters, coarse magnetic grain size and magnetically hard mineralogy. The geochemical data of the core also record the Little Ice Age (LIA) climatic events of Dalton and Maunder solar minima.
 
Date 2017-03-01T09:46:40Z
2017-03-01T09:46:40Z
2017
 
Type Journal Article
 
Identifier Marine Pollution Bulletin, vol.114(2); 2017; 805-815
http://drs.nio.org/drs/handle/2264/5089
 
Language en
 
Rights An edited version of this paper was published by Elsevier. Copyright [2016] Elsevier
 
Publisher Elsevier