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dc.contributor.authorKadam, Nitin
dc.contributor.authorSangode, S.J.
dc.contributor.authorVenkateshwarlu, M.
dc.contributor.authorMeshram, D.C.
dc.contributor.authorKulkarni, Y.R.
dc.contributor.authorBadesab, F.K.
dc.contributor.authorSingh, Jyotibala
dc.contributor.authorGudadhe, S.S.
dc.date.accessioned2023-05-01
dc.date.accessioned2023-07-17T15:51:03Z
dc.date.available2023-04-19
dc.date.available2023-07-17T15:51:03Z
dc.date.issued2023
dc.identifier.citationCATENA, vol.228; 2023; Article no: 107154
dc.identifier.issn0341-8162
dc.identifier.otherhttps://www.sciencedirect.com/science/article/pii/S034181622300245X
dc.identifier.urihttps://doi.org/10.1016/J.CATENA.2023.107154
dc.identifier.urihttp://drs.nio.res.in/drs/handle/2264/9072
dc.description6.367
dc.description.abstractLateritization in the Deccan basalt province (India) represents a large spectrum of chemical weathering with up to 99% CIA values and complete ferri- to antiferromagnetic transformations. We combined rock magnetic, palaeomagnetic, XRD, and XRF analyses to investigate the mineralogical transformations and its relationship to the acquisition of natural remanent magnetization (NRM) by sampling a 25 m thick Deccan lateritic profile from the West Coast of India. Significant amount of amorphous hematite (ha), crystalline hematite (hc), goethite and their Al- substituted forms were detected along with gibbsite and kaolinite. The domain size association of �SP + SD and �SP + SD + MD� in the ferri- as well as antiferromagnetic forms; and the combination of ha and hc yield strong NRMs amongst these laterites. Low field demagnetization (<5mT) allows removal of haNRM; and the secondary components due to ferrimagnetic oxides can be removed at < 25 mT. Thereafter, the hcNRM continued to decay up to > 150 mT. Palaeomagnetic tests (Koenigsberger ratio, MDF, intensity decay and Zijderveld diagrams) indicate stable Characteristic remanent magnetizations (ChRM) due to hc; and the Al-substitutions does not affect the ChRM stability, depicting these laterites as excellent palaeomagnetic recorders. The stable ChRMs due to Chemical/Crystallization RMs due to �hc� also benchmarks the degree of maturity within the process of lateritization.
dc.languageen
dc.publisherElsevier
dc.relation.isreferencedbySCI
dc.rightsOnly the author version of the copright reserved papers uploaded. Contact drs@nio.org for any complaints regarding copyright violations
dc.titleAcquisition of natural remanence in the basaltic laterites of Deccan volcanic province (India): Implications to palaeomagnetic studies in laterites
dc.typeJournal Article
dc.affiliation.authorCSIR-National Institute of Oceanography, Dona Paula, Goa, India


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