Detrital mineral ages from the Ross Supergroup, Antarctica: Implications for the Queen Maud terrane and outboard sediment provenance on the Gondwana margin

Paulsen, Timothy; Encarnación, John; Grunow, Anne M.; Valencia, Víctor A.; Layer, Paul W.; Pecha, Mark; Stump, Edmund; Roeske, Sarah M.; Thao, S.; Rasoazanamparany, Christine

doi:10.1016/j.gr.2013.10.006

Cited by 25 publications

(47 citation statements)

References 84 publications

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“…The maximum depositional ages and the youngest zircon ages are similar for these three groups and the Swanson Formation. In addition, the U-Pb age distributions of detrital zircons from the Swanson Formation are similar to those from metasedimentary rocks from the Trinity Peninsula Group and Fitzgerald Quartzite on the Antarctic Peninsula (Flowerdew et al, 2006a;Bradshaw et al, 2012), sedimentary rocks from the Ellsworth-Whitmore Mountains (Flowerdew et al, 2007), and Ross Supergroup sandstones in the Queen Maud Mountains (Paulsen et al, 2015).…”

Section: Detrital Zircon Provenance Across the Former Margin Of East mentioning

confidence: 61%

Paleozoic evolution of western Marie Byrd Land, Antarctica

Yakymchuk¹,

Brown²,

Brown³

et al. 2015

Geological Society of America Bulletin

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We report geochemical data from (meta-) sedimentary and igneous rocks that crop out in the Ford Ranges of western Marie Byrd Land and discuss the evolution and reworking of the crust in this region during Paleozoic subduction along the former Gondwanan convergent plate margin. Detrital zircon age spectra from the Swanson Formation, a widespread low-grade metaturbidite sequence, defi ne distinct populations in the late Paleoproterozoic, late Mesoproterozoic, and Neoproterozoic-Cambrian. The late Paleoproterozoic group records magmatism derived from a mixed juvenile and crustal source. By contrast, the late Mesoproterozoic group yields Hf isotope values consistent with derivation from a juvenile Meso proterozoic source inferred to be an unexposed Grenville-age orogenic belt beneath the East Antarctic ice sheet. For the Neoproterozoic-Cambrian population, Hf isotope values indicate reworking of these older materials during Ross-Delamerian orogenesis. New U-Pb ages from the Devonian-Carboniferous Ford Granodiorite suite across the Ford Ranges reveal an extended period of arc magmatism from 375 to 345 Ma. For four younger samples of Ford Granodiorite, Hf and O isotope values in zircon suggest involvement of a larger (meta-)sedimentary component in the petrogenesis than for two older samples. This contrasts with the secular trend toward more juvenile values documented from Silurian toPermian granite suites in the Tasmanides of eastern Australia and Famennian to Tournasian granite suites in New Zealand, pieces of continental crust that were once contigu-ous with western Marie Byrd Land along the Gondwana margin. The differences may relate to an along-arc change from the typical extensional accretionary mode in eastern Australia to a neutral or an advancing mode in West Antarctica, and to an across-arc difference in distance from the trench between the New Zealand fragments of Zealandia and western Marie Byrd Land. Upper Devonian anatectic granites in the Ford Ranges most likely record reworking of early Ford Granodiorite suite members during arc magmatism. † Current address:

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Section: Detrital Zircon Provenance Across the Former Margin Of East mentioning

confidence: 61%

Paleozoic evolution of western Marie Byrd Land, Antarctica

Yakymchuk¹,

Brown²,

Brown³

et al. 2015

Geological Society of America Bulletin

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“…Simplified map showing the sample localities and geology in the Ramsey, Shackleton, and Liv Glacier areas (modified from Mirsky 1969). Diamonds show localities of volcanic rock samples analyzed herein (Fairweather Formation: ATF, ASL, PRR-5298, ES148, GBH9D; Taylor Formation: GBH1B, ES61, PRR-5965, 1226954, 1228952; Greenlee Formation: WSH8), and asterisks show locations of previous detrital zircon U-Pb age analyses reported in Paulsen et al (2015Paulsen et al ( , 2017 and 206 Pb; a 10 12 -Ω Faraday collector for 207 Pb; and an ion-counting channel for 204 Pb. Ion yields are ∼1.0 mV/ppm.…”

Section: U-pb Methodsmentioning

confidence: 92%

“…More recently, U-Pb age analyses of volcanic rocks of the Taylor Formation at Taylor Nunatak yielded a relatively more precise 505 5 1:5 Ma crystallization age (Encarnación et al 1999). This age overlaps crystallization ages of rocks within the Queen Maud batholith and depositional ages indicated by detrital zircon analyses of Liv Group sandstones (Paulsen et al 2015(Paulsen et al , 2017, but it is the youngest volcanic rock recognized in the Ross-Delamerian orogenic belt outside of ∼500 Ma volcanic rocks in the Thiel and Pensacola Mountains (the Thiel Mountains porphyry and the Gambacorta Formation in fig. 2b).…”

Section: Geology Of the Queen Maud Mountainsmentioning

confidence: 91%

“…The new ages establish important Gunn and Warren (1962) and Cook and Craw (2001). Ages are compiled from Goodge andDallmeyer (1992, 1996), Rowell et al (1992Rowell et al ( , 1993Rowell et al ( , 1997, Goodge et al (1993Goodge et al ( , 2002Goodge et al ( , 2004aGoodge et al ( , 2004bGoodge et al ( , 2012, Hall et al (1995), Millar and Storey (1995), Encarnación and Grunow (1996), Cooper et al (1997, Encarnación et al (1999), Cox et al (2000), Encarnación (2000a, 2000b), Cook and Craw (2001), Allibone and Wysoczanski (2002), Mellish et al (2002), Myrow et al (2002), Read et al (2002), Vogel et al (2002), Curtis et al (2004), Paulsen et al (2004Paulsen et al ( , 2008Paulsen et al ( , 2013Paulsen et al ( , 2015Paulsen et al ( , 2017, Stump et al (2004Stump et al ( , 2006Stump et al ( , 2007, Wysoczanski and Allibone (2004), Cooper (2006a, 2006b), Talarico et al (2007) correlations between major volcanic-volcaniclastic units in the area and provide limits to the timing of their deformation. Paulsen et al (2008) describe the methods used for the separation and analysis of zircons from samples GBH9D and GBH1B.…”

Section: Geology Of the Queen Maud Mountainsmentioning

confidence: 99%

“…Igneous, sedimentary, and metamorphic rocks of the Ross orogen are of widespread interest because of their significance for understanding the tectonic history of Gondwana's paleo-Pacific margin (Stump 1992;Encarnación and Grunow 1996;Grunow et al 1996b;Goodge 1997;Goodge et al 1993Goodge et al , 2002Goodge et al , 2004aGoodge et al , 2004bCawood 2005;Boger 2011) and the possibility that they may offer insight into the Cambrian explosion of life, since the sediment flux caused by erosion of rocks of similar age is postulated to have seeded the oceans with the elements required for organisms to develop hard body parts (Squire et al 2006). These rocks have been the subject of numerous field and petrographical studies (Stump 1995) as well as modern geochronologic and geochemical work (Encarnación and Grunow 1996;Goodge andDallmeyer 1992, 1996;Goodge et al 1993Goodge et al , 2001Goodge et al , 2002Goodge et al , 2004aGoodge et al , 2004bGoodge et al , 2012Paulsen et al 2013Paulsen et al , 2015Paulsen et al , 2016aPaulsen et al , 2016bPaulsen et al , 2017Hagen-Peter et al 2015. Nevertheless, geochronologic studies have mostly been conducted on a reconnaissance basis throughout large sectors of the orogen, despite the fact that such data are important to help constrain the spatial-temporal patterns of magmatism related to the evolution of the Ross-Delamerian orogen (Borg and DePaolo 1991;Encarnación and Grunow 1996;Curtis et al 2004;Squire and Wilson 2005;Goodge et al 2012;Hagen-Peter et al 2015; Hagen-Peter and Cottle 2016) and metamorphic-magmatic episodes asso...…”

Section: Introductionmentioning

confidence: 99%

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Correlation and Late-Stage Deformation of Liv Group Volcanics in the Ross-Delamerian Orogen, Antarctica, from New U-Pb Ages

Paulsen

Encarnación

Grunow

et al. 2018

The Journal of Geology

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We present new zircon U-Pb isotopic data for volcanic rocks from deformed metavolcanic-sedimentary successions of the widespread Ross Supergroup in the Queen Maud Mountains, Antarctica. Zircon U-Pb analyses of Liv Group volcanic rocks thought to be Neoproterozoic in age instead have early Paleozoic ages. Zircon U-Pb analyses of five samples assigned to the Fairweather Formation have yielded 524 5 9 to 514 5 9 Ma (2j) crystallization ages, whereas six samples assigned to the Taylor Formation have yielded 510 5 12 to 490 5 6 Ma (2j) crystallization ages. Although these ages imply that the Fairweather Formation is generally older than the Taylor Formation, the age uncertainties show a 17-My overlap that is consistent with previous suggestions for temporal correlation of these formations. On a regional scale, Liv Group volcanism overlapped with the emplacement of ∼535-490 Ma plutonic rocks associated with the early Paleozoic Queen Maud batholith as well as igneous rocks found elsewhere along the early Paleozoic Pacific-Gondwana margin. Collectively, these igneous rocks provide plausible zircon sources for similar age detrital zircon populations found in outboard siliciclastic rocks belonging to the Leverett, Taylor, Fairweather, Greenlee, and Starshot Formations of the Queen Maud Mountains. The youngest crystallization age yielded by the deformed Taylor Formation (∼490 Ma) assumes regional significance because it represents the youngest volcanic rock yet identified within the Ross orogen in Antarctica and provides important new evidence for latest Cambrian or younger deformation, possibly associated with orogenic collapse during slab rollback at the terminal stages of the Ross orogeny.

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