A comparison of detrital U–Pb zircon, 40Ar/39Ar hornblende, 40Ar/39Ar biotite ages in marine sediments off East Antarctica: Implications for the geology of subglacial terrains and provenance studies

Pierce, E. L.; Hemming, S. R.; Williams, T.; Flierdt, Tina van de; Thomson, S. N.; Reiners, Peter W.; Gehrels, George E.; Brachfeld, Stefanie; Goldstein, S. L.

doi:10.1016/j.earscirev.2014.08.010

Cited by 48 publications

(43 citation statements)

References 106 publications

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“…Additionally, the predominant northward flow of the modern Kerguelen DWBC (Fukamachi et al, ) and its inferred northward flow in the Eocene (Scher et al, ) suggests that volcanogenic contributions transported to our study sites by deep currents from the eruption of the northern Kerguelen Plateau would be unlikely. The occurrence of IRD at ~33.7 Ma (when converted into the Gradstein et al, timescale) has also been established at Sites 748 (Zachos, Breza, et al, ) and 738 (Scher et al, ) and represents short episodes of ice rafting carrying terrigenous material derived from a metamorphic and/or plutonic terrane, such as those found on the Antarctic continent (Pierce et al, ). However, previous work has found that fossil fish teeth are not affected by postburial uptake of rare earth elements from IRD (Scher et al, ).…”

Section: Discussionmentioning

confidence: 93%

No Change in Southern Ocean Circulation in the Indian Ocean From the Eocene Through Late Oligocene

Wright

Scher

Seton

et al. 2018

Paleoceanog and Paleoclimatol

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Deciphering the evolution of Southern Ocean circulation during the Eocene and Oligocene has important implications for understanding the development of the Antarctic Circumpolar Current and transition to Earth's “icehouse” climate. To better understand ocean circulation patterns in the Indian Ocean sector of the Southern Ocean, we generated a new fossil fish tooth neodymium isotope record (εNd) from the upper Eocene to upper Oligocene sections (36–23 Ma) of Ocean Drilling Program Sites 744 and 748 (Kerguelen Plateau, Indian Ocean). Reconstructed seawater εNd values from fossil fish teeth are used to trace changes in water masses across ocean basins. The records from Site 748 and Site 744 reveal a gradual shift from εNd values around −6.5 to −7.5 in the late Eocene to εNd values between −7.5 and −8.3 by the late Oligocene, consistent with a Circumpolar Deep Water (CDW) influence at the Kerguelen Plateau throughout the Oligocene. We interpret the shift to less radiogenic values to reflect the increased export of Northern Component Water to the Southern Ocean, likely into the proto‐CDW. However, the records show no major change in water mass composition around the Kerguelen Plateau that would accompany an increase in Pacific throughflow related to the opening of Drake Passage and imply that Pacific throughflow via the Drake Passage occurred by the late Eocene. High‐frequency variability in ɛNd values at Site 744 is interpreted as an imprint of Oligocene glacial activity, with a particularly pronounced excursion at 32.6 Ma roughly coinciding with other glacial weathering indicators around Antarctica.

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Section: Discussionmentioning

confidence: 93%

No Change in Southern Ocean Circulation in the Indian Ocean From the Eocene Through Late Oligocene

Wright

Scher

Seton

et al. 2018

Paleoceanog and Paleoclimatol

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“…The 40 Ar/ 39 Ar data are offset toward younger ages compared to the dominant Ross/Pan‐African zircon U‐Pb populations (Figure ), consistent with hornblende's lower closure temperature. The distributions of the 40 Ar/ 39 Ar ages from this study are similar to 40 Ar/ 39 Ar data from detrital minerals from Prydz Bay, Dronning Maud Land, and the Weddell Sea [ Roy et al ., ; Pierce et al ., , ].…”

Section: Resultsmentioning

confidence: 99%

“…Methods are reported in Pierce et al . [, ]. Hornblende samples and standards were coirradiated at the USGS TRIGA reactor in Denver.…”

Section: Methodsmentioning

confidence: 99%

“…Sediment that has been glacially eroded and transported from the interior of East and West Antarctica, which was deposited at the heads of major outlet glaciers and beneath ice streams, provides a means to understand the geologic history of inaccessible bedrock and gain insight into the geologic, tectonic, and ice sheet evolution of Antarctica [e.g., Licht et al, 2005Licht et al, , 2014Goodge et al, 2008Goodge et al, , 2010. Isotopic signatures of detrital minerals from glaciogenic sediments, combined with outcrop data, are increasingly being tapped as valuable resources for characterizing provenance signatures of local and far-traveled subglacial material in order to assess changes in Neogene-Quaternary Antarctic ice sheet dynamics, reconstruct LGM paleoflow lines and to elucidate otherwise inaccessible geologic terranes in Antarctica [Farmer et al, 2006;Pierce et al, 2011Pierce et al, , 2014Cook et al, 2013;Flowerdew et al, 2013;Licht and Palmer, 2013].…”

Section: Introductionmentioning

confidence: 99%

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Applications of detrital geochronology and thermochronology from glacial deposits to the Paleozoic and Mesozoic thermal history of the Ross Embayment, Antarctica

Welke

Licht

Hennessy

et al. 2016

Geochem Geophys Geosyst

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Till from moraines at the heads of six major outlet glaciers in the Transantarctic Mountains (TAM) and from till beneath three West Antarctic ice streams have a ubiquitous zircon U‐Pb age population spanning the time of the Ross/Pan‐African Orogenies (610–475 Ma). Geochronology and thermochronology of detrital minerals in these Antarctic glacial tills reveal two different thermal histories for the central and southern TAM. Double‐dating of the zircons reveals a geographically widespread (U‐Th)/He (ZHe) population of 180–130 Ma in most of the till samples. Sandstone outcrops at Shackleton Glacier, and three Beacon Supergroup sandstone clasts from three moraines, have ZHe ages that fall entirely within this range. The similar population and proximity of many of the till samples to Beacon outcrops lead us to suggest that this extensive ZHe population in the tills is derived from Beacon Supergroup rocks and reflects the thermal response of the Beacon Basin to the breakup of Gondwana. A second population of older (>200 Ma) ZHe ages in tills at the head of Byrd, Nimrod, and Reedy Glaciers. For the tills at the head of the Nimrod and Byrd Glaciers, integrating the double‐dated zircon results with 40Ar/39Ar of hornblende, muscovite and biotite, and U‐Pb and (U‐Th‐Sm)/He double‐dates on apatite yields a typical pattern of early rapid orogenic cooling (∼4–10°C/Myr) 590–475 Ma after the emplacement of the Granite Harbour Intrusives. Low temperature thermochronometers at these sites yield variable but quite old ages (ZHe 480–70 Ma and AHe 200–70 Ma) that require a long history at low temperature.

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“…15; Alexanderson and Murray, 2012;Fuchs and Owen, 2008;Hillenbrand et al, 2010b;Simon et al, 2012;Brachfeld et al, 2003;Stoner et al, 2000;Hendy and Cosma, 2008;Davies et al, 2011;Praetorius and Mix, 2014). Where distinctive bedrock geology is present, the relative contributions of glacially eroded sediments from different ice sources can be established through temporal analyses of sediment provenance Andrews and Vogt, 2014;Cook et al, 2014;Reyes et al, 2014;Simon et al, 2014;Pierce et al, 2014;Flowerdew Fig. 14.…”

Section: Quaternary Glacial-interglacial Cyclesmentioning

confidence: 99%

The role of the cryosphere in source-to-sink systems

Jaeger

Koppes

2016

Earth-Science Reviews

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A comparison of detrital U–Pb zircon, 40Ar/39Ar hornblende, 40Ar/39Ar biotite ages in marine sediments off East Antarctica: Implications for the geology of subglacial terrains and provenance studies

Cited by 48 publications

References 106 publications

No Change in Southern Ocean Circulation in the Indian Ocean From the Eocene Through Late Oligocene

No Change in Southern Ocean Circulation in the Indian Ocean From the Eocene Through Late Oligocene

Applications of detrital geochronology and thermochronology from glacial deposits to the Paleozoic and Mesozoic thermal history of the Ross Embayment, Antarctica

The role of the cryosphere in source-to-sink systems

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