Geochemistry of Late Cenozoic basalts from the Crary Mountains: characterization of mantle sources in Marie Byrd Land, Antarctica

Panter, K. S.; Hart, Stanley R.; Kyle, Philip R.; Blusztanjn, Jerzy; Wilch, T. I.

doi:10.1016/s0009-2541(99)00171-0

Cited by 80 publications

(91 citation statements)

References 77 publications

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“…This magmatism has been related to large-scale mantle upwelling in conjunction with extensioninduced rifting (Finn et al, 2005). Others assume an active mantle plume in the area of the Bellingshausen-Amundsen Sea or beneath East Gondwana (Hole and LeMasurier, 1994;Weaver et al, 1994;Rocholl et al, 1995;Hart et al, 1995Hart et al, , 1997Panter et al, 2000;Hoernle et al, 2010;Sutherland et al, 2010), which may have caused the final break-up of Zealandia from Antarctica (e.g., Weaver et al, 1994;Storey et al, 1999;Hoernle et al, 2010). As the region underwent further plate reorganization, a second phase of volcanism occurred (Rocchi et al, 2002a,b;Nardini et al, 2009 andreferences therein, LeMasurier et al, 1990).…”

Section: Tectonic and Magmatic Evolution Of The Sw-pacific Over The Pmentioning

confidence: 99%

“…The field for West Antarctic volcanics is defined by data of the WARS (Rocholl et al, 1995;Rocchi et al, 2002a), the Jones Mountains in Ellsworth Land , and the Marie Byrd Land Volcanic Province (Hart et al, 1997;Panter et al, 1997Panter et al, , 2000, which extends along the Pacific margin of Marie Byrd Land. Most authors consider the volcanism at the Marie Byrd Land Volcanic Province and Jones Mountains as related to the WARS (e.g., Hart et al, 1995Hart et al, , 1997Panter et al, 2000). The field for the Hikurangi Seamounts is based on data by Hoernle et al (2010), published data for Peter I Island comprise analyses of subaerial basaltic lavas from Prestvik et al (1990) and Hart et al (1995).…”

Section: Sr-nd-pb-hf Isotopesmentioning

confidence: 99%

“…These include the Chatham Rise, Hikurangi Seamounts, intraplate volcanic fields in New Zealand, sub-Antarctic islands and West Antarctica (e.g., Weaver and Pankhurst, 1991;Baker et al, 1994;Weaver et al, 1994;Rocholl et al, 1995;Hart et al, 1997;Panter et al, 2000;Tappenden, 2003;Panter et al, 2006;Nardini et al, 2009;Hoernle et al, 2010). In all these localities, volcanic centers are diffusely distributed and do not show any age progression relative to plate motion.…”

Section: Origin Of the Himu Component In Non-hotspot Related Southwesmentioning

confidence: 99%

“…This plume event may have also influenced the source characteristics of the Hikurangi Seamounts and may have been accompanied by large scale underplating of the Zealandia continental lithosphere by HIMU material (e.g. Weaver et al, 1994;Hart et al, 1997;Panter et al, 2000) (Fig. 13).…”

Section: Origin Of the Himu Component In Non-hotspot Related Southwesmentioning

confidence: 99%

“…10 and 11). Accordingly, many authors relate the Cenozoic HIMU similarities in West Antarctica to the reactivation of HIMU material, added to the base of the continental lithosphere during the earliest pre-rifting stage of the Marie Byrd Land through plume activity (e.g., Weaver et al, 1994;Rocholl et al, 1995;Hart et al, 1997;Panter et al, 2000 Pb of b 20 Ma WARS volcanics and generation of their HIMU isotopic source signatures through radiogenic ingrowth over extremely short time scales. The regional context, however, requires the presence of a HIMU component that is already present in the Cretaceous, so that the metasomatic model of Nardini et al (2009) for the formation of HIMU appears less likely.…”

Section: Origin Of the Himu Component In Non-hotspot Related Southwesmentioning

confidence: 99%

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Seamounts off the West Antarctic margin: A case for non-hotspot driven intraplate volcanism

et al. 2014

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Section: Tectonic and Magmatic Evolution Of The Sw-pacific Over The Pmentioning

confidence: 99%

Section: Sr-nd-pb-hf Isotopesmentioning

confidence: 99%

Section: Origin Of the Himu Component In Non-hotspot Related Southwesmentioning

confidence: 99%

Section: Origin Of the Himu Component In Non-hotspot Related Southwesmentioning

confidence: 99%

Section: Origin Of the Himu Component In Non-hotspot Related Southwesmentioning

confidence: 99%

See 3 more Smart Citations

Seamounts off the West Antarctic margin: A case for non-hotspot driven intraplate volcanism

et al. 2014

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Metasomatized ancient lithospheric mantle beneath the young Zealandia microcontinent and its role in HIMU-like intraplate magmatism

Scott

Waight²,

Meer³

et al. 2014

Geochem. Geophys. Geosyst.

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There has been long debate on the asthenospheric versus lithospheric source for numerous intraplate basalts with ocean island basalt (OIB) and high time-integrated U/Pb (HIMU)-like source signatures that have erupted through the Zealandia continental crust. Analysis of 157 spinel facies peridotitic mantle xenoliths from 25 localities across Zealandia permits the first comprehensive regional description of the subcontinental lithospheric mantle (SCLM) and insights into whether it could be a source to the intraplate basalts. Contrary to previous assumptions, the Oligocene-Miocene Zealandia SCLM is highly heterogeneous. It is composed of a refractory craton-like domain (West Otago) adjacent to several moderately fertile domains (East Otago, North Otago, Auckland Islands). Each domain has an early history decoupled from the overlying Carboniferous and younger continental crust, and each domain has undergone varying degrees of depletion followed by enrichment. Clinopyroxene grains reveal trace element characteristics (low Ti/Eu, high Th/U) consistent with enrichment through reaction with carbonatite. This metasomatic overprint has a composition that closely matches HIMU in Sr, Pb 6 Nd isotopes. However, clinopyroxene Hf isotopes are in part highly radiogenic and decoupled from the other isotope systems, and also mostly more radiogenic than the intraplate basalts. If the studied spinel facies xenoliths are representative of the thin Zealandia SCLM, the melting of garnet facies lithosphere could only be the intraplate basalt source if it had a less radiogenic Hf-Nd isotope composition than the investigated spinel facies, or was mixed with asthenosphere-derived melts containing less radiogenic Hf.

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The mantle transition zone beneath West Antarctica: Seismic evidence for hydration and thermal upwellings

Emry

Nyblade

Julià

et al. 2015

Geochem Geophys Geosyst

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Although prior work suggests that a mantle plume is associated with Cenozoic rifting and volcanism in West Antarctica, the existence of a plume remains conjectural. Here we use P wave receiver functions (PRFs) from the Antarctic POLENET array to estimate mantle transition zone thickness, which is sensitive to temperature perturbations, throughout previously unstudied parts of West Antarctica. We obtain over 8000 high-quality PRFs using an iterative, time domain deconvolution method filtered with a Gaussian width of 0.5 and 1.0, corresponding to frequencies less than 0.24 and 0.48 Hz, respectively. Single-station and common conversion point stacks, migrated to depth using the AK135 velocity model, indicate that mantle transition zone thickness throughout most of West Antarctica does not differ significantly from the global average, except in two locations; one small region exhibits a vertically thinned (210 6 15 km) transition zone beneath the Ruppert Coast of Marie Byrd Land and another laterally broader region shows slight, vertical thinning (225 6 25 km) beneath the Bentley Subglacial Trench. We also observe the 520 discontinuity and a prominent negative peak above the mantle transition zone throughout much of West Antarctica. These results suggest that the mantle transition zone may be hotter than average in two places, possibly due to upwelling from the lower mantle, but not broadly across West Antarctica. Furthermore, we propose that the transition zone may be hydrated due to >100 million years of subduction beneath the region during the early Mesozoic.

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Geochemistry of Late Cenozoic basalts from the Crary Mountains: characterization of mantle sources in Marie Byrd Land, Antarctica

Cited by 80 publications

References 77 publications

Seamounts off the West Antarctic margin: A case for non-hotspot driven intraplate volcanism

Seamounts off the West Antarctic margin: A case for non-hotspot driven intraplate volcanism

Metasomatized ancient lithospheric mantle beneath the young Zealandia microcontinent and its role in HIMU-like intraplate magmatism

The mantle transition zone beneath West Antarctica: Seismic evidence for hydration and thermal upwellings

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