Search Results - "Pankhurst, Robert J."

Tectonic overview of the West Gondwana margin by Vaughan, Alan P.M., Pankhurst, Robert J.

“…The oceanic southern margin of Gondwana, from southern South America through South Africa, West Antarctica, New Zealand (in its pre break-up position), and…”
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Late Famatinian (440–410 Ma) overprint of Grenvillian metamorphism in Grt‐St schists from the Sierra de Maz (Argentina): Phase equilibrium modelling, geochronology, and tectonic significance by Verdecchia, Sebastián O., Ramacciotti, Carlos D., Casquet, Cesar, Baldo, Edgardo G., Murra, Juan A., Pankhurst, Robert J.

“…The analysis of major and trace elements in zoned minerals is useful for deciphering parts of the tectonothermal evolution of polymetamorphic tarrain. We…”
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Zircon O- and Hf-isotope constraints on the genesis and tectonic significance of Permian magmatism in Patagonia by Castillo, Paula, Fanning, C. Mark, Pankhurst, Robert J, Hervé, Francisco, Rapela, Carlos W

“…The genesis of Permian magmatism in southern South America is actively debated, particularly in relation to the origin of Patagonia. U-Pb zircon ages of c. 255…”
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The pre-Mesozoic rocks of northern Chile: U–Pb ages, and Hf and O isotopes by Pankhurst, Robert J., Hervé, Francisco, Fanning, C. Mark, Calderón, Mauricio, Niemeyer, Hans, Griem-Klee, Susanne, Soto, Fernanda

“…Supposed pre-Mesozoic igneous and metamorphic rocks from northern Chile are reviewed in the light of twenty-one new SHRIMP U–Pb zircon age determinations…”
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Devonian magmatism in the accretionary complex of southern Chile by Hervé, F, Calderon, M, Fanning, C. Mark, Pankhurst, Robert J, Fuentes, F, Rapela, C. W, Correa, J, Quezada, P, Marambio, C

“…Supposed or potential Devonian igneous rocks in the accretionary complex of southern Chile were investigated using sensitive high-resolution ion microprobe…”
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Early Jurassic magmatism on the Antarctic Peninsula and potential correlation with the Subcordilleran plutonic belt of Patagonia by Riley, Teal R, Flowerdew, Michael J, Pankhurst, Robert J, Curtis, Mike L, Millar, Ian L, Fanning, C. Mark, Whitehouse, Martin J

“…Early Jurassic silicic volcanic rocks of the Chon Aike Province (V1: 187 - 182 Ma) are recognized from many localities in the southern Antarctic Peninsula and…”
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A Cambrian mixed carbonate–siliciclastic platform in SW Gondwana: evidence from the Western Sierras Pampeanas (Argentina) and implications for the early Paleozoic paleogeography of the proto-Andean margin by Ramacciotti, Carlos D., Casquet, César, Baldo, Edgardo G., Galindo, Carmen, Pankhurst, Robert J., Verdecchia, Sebastián O., Rapela, Carlos W., Fanning, Mark

“…The Western Sierras Pampeanas (WSP) of Argentina record a protracted geological history from the Mesoproterozoic assembly of the Rodinia supercontinent to the…”
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Comments on Bahlburg (2021), A Silurian-Devonian active margin in the proto- Andes -new data on an old conundrum: International Geology Review doi.org/10.1080/00206814.2021.2012719 by Dahlquist, Juan A., Morales Cámera, Matías M., Alasino, Pablo H., Pankhurst, Robert J., Rapela, Carlos W., Moreno, Juan A., Baldo, Edgardo G., Rocher, Sebastián

“…We clarify some statements on our works included by Bahlburg (2021), which we think are confusing and misleading. Clarification is highly necessary to…”
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Magmatic differentiation in the calc-alkaline Khalkhab–Neshveh pluton, Central Iran by Rezaei-Kahkhaei, Mehdi, Galindo, Carmen, Pankhurst, Robert J., Esmaeily, Dariush

“…► The pluton has wide composition which all rock types are co-magmatic. ► The initial magma might have been derived from metasomatized mantle. ► Arabian and…”
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Mid- to Late Cambrian docking of the Río de la Plata Craton to southwestern Gondwana; age constraints from U-Pb SHRIMP detrital zircon ages from Sierras de Ambato and Velasco (Sierras Pampeanas, Argentina) by Verdecchia, Sebastián O, Casquet, Cesar, Baldo, Edgardo G, Pankhurst, Robert J, Rapela, Carlos W, Fanning, Mark, Galindo, Carmen

“…The Early Palaeozoic stratigraphy and tectonic history of the Eastern Sierras Pampeanas of central Argentina are complicated by metamorphism and deformation…”
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The Capilla del Monte pluton, Sierras de Córdoba, Argentina: the easternmost Early Carboniferous magmatism in the pre-Andean SW Gondwana margin by Dahlquist, Juan A., Pankhurst, Robert J., Rapela, Carlos W., Basei, Miguel A. S., Alasino, Pablo H., Saavedra, Julio, Baldo, Edgardo G., Murra, Juan A., da Costa Campos Neto, Mario

“…New geochronological, geochemical, and isotopic data are reported for the Capilla del Monte two-mica granite pluton in the northeastern Sierras de Córdoba. An…”
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Origins of Large Volume Rhyolitic Volcanism in the Antarctic Peninsula and Patagonia by Crustal Melting by RILEY, TEAL R., LEAT, PHILIP T., PANKHURST, ROBERT J., HARRIS, CHRIS

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Lu–Hf isotope evidence for the provenance of Permian detritus in accretionary complexes of western Patagonia and the northern Antarctic Peninsula region by Fanning, C. Mark, Hervé, Francisco, Pankhurst, Robert J., Rapela, Carlos W., Kleiman, Laura E., Yaxley, Greg M., Castillo, Paula

“…Lu–Hf isotope data are presented for dated Permian zircon grains from six samples of the latest Palaeozoic to Jurassic low-grade metasedimentary rocks of…”
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Mesozoic-Cenozoic evolution of the North Patagonian Batholith in Aysen, southern Chile by Pankhurst, Robert J, Weaver, S. D, Hervé, F, Larrondo, P

“…A detailed Rb-Sr geochronological and geochemical study has been carried out on granitoids of the North Patagonian batholith in Aysen. The results for 25…”
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Basement chronology of the Antarctic Peninsula; recurrent magmatism and anatexis in the Palaeozoic Gondwana Margin by Millar, I. L, Pankhurst, Robert J, Fanning, C. Mark

“…A revised pre-Jurassic chronology is presented for the Antarctic Peninsula on the basis of new U-Pb zircon dating, using both conventional (11 samples) and…”
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Mantle plumes and Antarctica-New Zealand rifting; evidence from Mid-Cretaceous mafic dykes by Storey, Bryan C, Leat, Philip T, Weaver, Stephen D, Pankhurst, Robert J, Bradshaw, John D, Kelley, Simon

“…Ocean floor magnetic anomalies show that New Zealand was the last continental fragment to separate from Antarctica during Gondwana break-up, drifting from…”
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A Mid-Cretaceous age for the Palmer Land event, Antarctic Peninsula; implications for terrane accretion timing and Gondwana palaeolatitudes by Vaughan, Alan P. M, Pankhurst, Robert J, Fanning, C. Mark

“…New structural and age data suggest that West Gondwana may have been at lower palaeolatitudes than previously interpreted from Albian sequences in Gondwana…”
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Identifying Laurentian and SW Gondwana sources in the Neoproterozoic to Early Paleozoic metasedimentary rocks of the Sierras Pampeanas: Paleogeographic and tectonic implications by Rapela, Carlos W., Verdecchia, Sebastian O., Casquet, Cesar, Pankhurst, Robert J., Baldo, Edgardo G., Galindo, Carmen, Murra, Juan A., Dahlquist, Juan A., Fanning, C. Mark

“…The provenance of Neoproterozoic to Early Paleozoic sedimentary rocks in the Sierras Pampeanas has been established using U–Pb SHRIMP age determination of…”
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A review of the Famatinian Ordovician magmatism in southern South America: evidence of lithosphere reworking and continental subduction in the early proto-Andean margin of Gondwana by Rapela, Carlos W., Pankhurst, Robert J., Casquet, César, Dahlquist, Juán A., Mark Fanning, C., Baldo, Edgardo G., Galindo, Carmen, Alasino, Pablo H., Ramacciotti, Carlos D., Verdecchia, Sebastián O., Murra, Juán A., Basei, Miguel A.S.

“…Along the proto-Pacific margin of Gondwana, from Venezuela to northeastern Patagonia, the Early–Middle Ordovician Famatinian orogeny was the first orogenic…”
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A review of Devonian–Carboniferous magmatism in the central region of Argentina, pre-Andean margin of SW Gondwana by Dahlquist, Juan A., Morales Cámera, Matías M., Alasino, Pablo H., Pankhurst, Robert J., Basei, Miguel A.S., Rapela, Carlos W., Moreno, Juan A., Baldo, Edgardo G., Galindo, Carmen

“…We review a widespread project database for Devonian–Carboniferous magmatism in the Sierras Pampeanas and Frontal Cordillera between 27° and 35°S, including…”
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