Sequence stratigraphy of the ANDRILL AND-2A drillcore, Antar
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TitleSequence stratigraphy of the ANDRILL AND-2A drillcore, Antarctica: A long-term, ice-proximal record of Early to Mid-Miocene climate, sea-level and glacial dynamismAbstractPresent understanding of Antarctic climate change during the Early to Mid-Miocene, including major cycles of glacial expansion and contraction, relies in large part on stable isotope proxies from deep sea core drilling. Here, we summarize the lithostratigraphy of the ANDRILL Southern McMurdo Sound Project drillcore AND-2A. This core offers a hitherto unavailable ice-proximal stratigraphic archive from a high-accommodation continental margin setting, and provides clear evidence of repeated fluctuations in climate, ice expansion/contraction and attendant sea-level change over the period c. 20.2-14.2. Ma, with a more fragmentary record of Late Miocene and Pliocene time. The core is divided into seventy-four high-frequency (fourth- or fifth-order) glacimarine sequences recording repeated advances and retreats of glaciers into and out of the Victoria Land Basin. The section can be resolved into thirteen longer-term, composite (third-order) sequences, which comprise packages of higher frequency sequences that show a consistent stratigraphic stacking pattern (Stratigraphic Motif). The distribution of the six recognized motifs indicates intervals of less and more ice-proximal, and temperate to subpolar/polar climate, through the Miocene period. The core demonstrates a dynamic climate regime throughout the Early to Mid-Miocene that may be correlated to some previously-recognized events such as the Mid-Miocene Climatic Optimum, and provides a detailed reference point from which to evaluate stable isotope proxy records from the deep-sea. Copyright 2011 Elsevier B.V.AcknowledgementsThis paper is based on work supported by the National Science Foundation under Cooperative Agreement No. 0342484 through subawards administered by the ANDRILL Science Management Office (SMO) at University of Nebraska-Lincoln as part of the ANDRILL U.S. Science Support Program. We thank the SMS Drillsite and Science teams for their efforts in acquiring and characterizing the AND-2A core, and Steve Fischbein at the ANDRILL SMO for assistance with diagrams. The ANDRILL Program is a multinational collaboration between the Antarctic programs of Germany, Italy, New Zealand and the United States. Antarctica New Zealand is the project operator and developed the drilling system in collaboration with Alex Pyne at Victoria University of Wellington and Webster Drilling and Exploration Ltd. Antarctica New Zealand supported the drilling team at Scott Base; Raytheon Polar Services Corporation supported the science team at McMurdo Station and the Crary Science and Engineering Laboratory. The ANDRILL Science Management Office at the University of Nebraska-Lincoln provided science planning and operational support. Scientific studies are jointly supported by the US National Science Foundation (NSF), NZ Foundation for Research, Science and Technology (FRST), the Italian Antarctic Research Program (PNRA), the German Research Foundation (DFG) and the Alfred Wegener Institute for Polar and Marine Research (AWI). Editor David Bottjer and two anonymous referees are thanked for their reviews of the submitted manuscript.
1st AuthorFielding, C.AuthorFielding, C.Browne, G.Field, B.Florindo, F.Harwood, D.Krissek, L.Levy, R.Panter, K.Passchier, S.Pekar, S.Year2011JournalPalaeogeography, Palaeoclimatology, PalaeoecologyVolume305Number1/04/2017Pages337-351DOI10.1016/j.palaeo.2011.03.026URLhttps://www.scopus.com/inward/recor.....04c8a8081a5c81a458f00e878Keywordsclimate variationdeep drillingdeep seaglacier advanceglacier dynamicslithostratigraphyMiocenepaleoclimateproxy climate recordsea level changesequence stratigraphystable isotope, AntarcticaEast AntarcticaMcMurdo Sound, rank5Author KeywordsANDRILL SMS projectAntarcticaCyclicityMid-Miocene Climatic OptimumMioceneSequence stratigraphy
TypeArticleCitationFielding, C., Browne, G., Field, B., Florindo, F., Harwood, D., Krissek, L., Levy, R., Panter, K., Passchier, S. and Pekar, S. (2011). Sequence stratigraphy of the ANDRILL AND-2A drillcore, Antarctica: A long-term, ice-proximal record of Early to Mid-Miocene climate, sea-level and glacial dynamism. Palaeogeography, Palaeoclimatology, Palaeoecology, 305(1-4): 337-351
Antarctica NZ (26th Nov 2018). Sequence stratigraphy of the ANDRILL AND-2A drillcore, Antar . In Website Antarctica NZ. Retrieved 13th Apr 2021 08:26, from https://adam.antarcticanz.govt.nz/nodes/view/63489