Sedimentological Attributes and Quartz Microtexture in the Levee Sediments of a Submarine Channel in Context of the East Antarctic Ice Sheet Fluctuations: A Study from Site U-1359 of IODP-318 Expedition

Biswas, Paromita; Pant, N. C.; Pandey, Mayuri; Shrivastava, Prakash K.

doi:10.1007/978-3-030-40659-2_8

Cited by 2 publications

(3 citation statements)

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“…2; Tauxe et al 2012. The dominant grain size lies within the field of coarse silt to fine silt; hence, whole samples were taken for chemical treatment (Biswas et al 2020) and entire detritals > 53 μm were considered for heavy media separation. Grain sizes ~1 mm were studied as rock fragments separately, which were derived as IRD.…”

Section: Methodsmentioning

confidence: 99%

“…Recent geological interpretations derived from IODP Expedition 318 (e.g. Cook et al 2013, 2017, Verma et al 2014, Pandey et al 2018, Biswas et al 2020) augment earlier records from other Antarctic continental areas and margins indicating a relatively dynamic EAIS, especially during Late Miocene to Early/Middle Pliocene times (Naish et al 2009, Verma et al 2014, Pandey et al 2018, 2021, Biswas et al 2020). The general circulation model experiments of the Wilkes Land sector suggested that east wind drifts prevailed north of 60°S under Miocene boundary conditions, similar to today (Herold et al 2011, Bijl et al 2018).…”

Section: Geological Overview Of the Areamentioning

confidence: 96%

“…Recent geological interpretations derived from IODP Expedition 318 (e.g. Cook et al 2013, Verma et al 2014, Pandey et al 2018, Biswas et al 2020 Orejola et al 2014). All of the sediments and detritals further transported to the continental rise through the Jussieu submarine channel.…”

Section: Geological Overview Of the Areamentioning

confidence: 99%

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Unravelling the complex sub-ice geology of the Wilkes Subglacial Basin region of East Antarctica from marine sediment provenance analyses

et al. 2023

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Deciphering the sub-ice geology in the Wilkes Subglacial Basin region is important for understanding solid earth-ice sheet evolution and for assessing geological ties between East Antarctica and formerly contiguous Australia. We analyse marine sediment samples derived from drill site U1359 of Integrated Oceanic Drilling Program Expedition 318. Our study reports for the first time that the inland sediment source area comprises a complex mafic igneous terrain and a metamorphosed Precambrian subglacial basement. Pyroxene geochemical analyses confirm the presence of tholeiitic to calc-alkaline basalts. The high-grade part of the subglacial terrain contains upper amphibolite to granulite facies rocks that are comparable to Archaean to Palaeoproterozoic rocks exposed in the Terre Adélie Craton and the formerly adjacent Gawler Craton in Australia. Chemical Th-U-total Pb isochron method (CHIME) ages extracted from a subhedral monazite grain associated with the low-grade biotite-muscovite schist rock fragment provide a unimodal age of 799 ± 13 Ma. Rare occurrences of 800 Ma age in the Terre Adélie Craton and/or George V Coast provide evidence for the presence of at least one late Neoproterozoic magmato-metamorphic event in the interior of Wilkes Land. The affinity of the unexposed geological domains of Wilkes Land, East Antarctica, with their Australian counterparts is discussed in the context of the Rodinia supercontinent.

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Section: Methodsmentioning

confidence: 99%