{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,12,18]],"date-time":"2025-12-18T23:57:48Z","timestamp":1766102268134},"reference-count":56,"publisher":"Geological Society of London","issue":"2","license":[{"start":{"date-parts":[[2016,11,3]],"date-time":"2016-11-03T00:00:00Z","timestamp":1478131200000},"content-version":"stm-asf","delay-in-days":0,"URL":"https:\/\/doi.org\/10.15223\/policy-002"}],"content-domain":{"domain":["lyellcollection.org"],"crossmark-restriction":true},"short-container-title":["JGS"],"published-print":{"date-parts":[[2017,3]]},"abstract":"<jats:p>Early Jurassic silicic volcanic rocks of the Chon Aike Province (V1: 187\u2009\u2013\u2009182\u2005Ma) are recognized from many localities in the southern Antarctic Peninsula and NE Patagonia and are essentially coeval with the extensive Karoo (182\u2005Ma) and Ferrar (183\u2005Ma) large igneous provinces of pre-breakup Gondwana. Until recently, plutonic rocks of this age were considered either rare in or absent from the Antarctic Peninsula batholith, which was thought to have been mainly constructed during the Middle Jurassic and the mid-Cretaceous. New U\u2013Pb zircon geochronology from the Antarctic Peninsula and recently published U\u2013Pb ages from elsewhere in the Peninsula and Patagonia are used to demonstrate the more widespread nature of Early Jurassic plutonism. Eight samples are dated here from the central and southern Antarctic Peninsula. They are all moderately to strongly foliated granitoids (tonalite, granite, granodiorite) and locally represent the crystalline basement. They yield ages in the range 188\u2009\u2013\u2009181\u2005Ma, which overlap with published ages of 185\u2009\u2013\u2009180\u2005Ma from granitoids from elsewhere on the Antarctic Peninsula and from the Subcordilleran plutonic belt of Patagonia (185\u2009\u2013\u2009181\u2005Ma). Whereas Early Jurassic plutons of the Subcordilleran plutonic belt of Patagonia are directly related to subduction processes along the proto-Pacific margin of Gondwana, coeval volcanic rocks of the Chon Aike Province are interpreted to be directly associated with extension and plume activity during the initial stages of Gondwana breakup. This indicates that subduction was continuing when Chon Aike Province volcanism started. The Early Jurassic plutonism on the Antarctic Peninsula is transitional between subduction-related and breakup-related magmatism.<\/jats:p>\n          <jats:p content-type=\"supplementary-material\">\n            <jats:bold>Supplementary material<\/jats:bold>\n            : Cathodoluminescence images of analysed zircon grains from sites on the Antarctic Peninsula are available at\n            <jats:ext-link xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" ext-link-type=\"uri\" xlink:href=\"https:\/\/doi.org\/10.6084\/m9.figshare.c.3521973\">https:\/\/doi.org\/10.6084\/m9.figshare.c.3521973<\/jats:ext-link>\n          <\/jats:p>","DOI":"10.1144\/jgs2016-053","type":"journal-article","created":{"date-parts":[[2016,11,4]],"date-time":"2016-11-04T01:49:39Z","timestamp":1478224179000},"page":"365-376","update-policy":"http:\/\/dx.doi.org\/10.1144\/crossmark-policy","source":"Crossref","is-referenced-by-count":38,"title":["Early Jurassic magmatism on the Antarctic Peninsula and potential correlation with the Subcordilleran plutonic belt of Patagonia"],"prefix":"10.1144","volume":"174","author":[{"given":"Teal R.","family":"Riley","sequence":"first","affiliation":[{"name":"British Antarctic Survey, High Cross, Madingley Road, Cambridge CB3 0ET, UK"}]},{"given":"Michael J.","family":"Flowerdew","sequence":"additional","affiliation":[{"name":"British Antarctic Survey, High Cross, Madingley Road, Cambridge CB3 0ET, UK"},{"name":"CASP, 181A Huntingdon Road, Cambridge CB3 0DH, UK"}]},{"given":"Robert J.","family":"Pankhurst","sequence":"additional","affiliation":[{"name":"British Geological Survey, Keyworth, Nottingham NG12 5GG, UK"}]},{"given":"Mike L.","family":"Curtis","sequence":"additional","affiliation":[{"name":"British Antarctic Survey, High Cross, Madingley Road, Cambridge CB3 0ET, UK"},{"name":"CASP, 181A Huntingdon Road, Cambridge CB3 0DH, UK"}]},{"given":"Ian L.","family":"Millar","sequence":"additional","affiliation":[{"name":"British Geological Survey, Keyworth, Nottingham NG12 5GG, UK"}]},{"given":"C. Mark","family":"Fanning","sequence":"additional","affiliation":[{"name":"Research School of Earth Sciences, The Australian National University, Canberra, ACT 0200, Australia"}]},{"given":"Martin J.","family":"Whitehouse","sequence":"additional","affiliation":[{"name":"Swedish Museum of Natural History, Box 50007, SE-104 05 Stockholm, Sweden"}]}],"member":"1881","published-online":{"date-parts":[[2016,11,3]]},"reference":[{"key":"e_1_3_2_2_1","doi-asserted-by":"publisher","DOI":"10.1017\/S095410200999054X"},{"key":"e_1_3_2_3_1","doi-asserted-by":"publisher","DOI":"10.1017\/S001675681100080X"},{"key":"e_1_3_2_4_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.epsl.2015.01.037"},{"key":"e_1_3_2_5_1","doi-asserted-by":"publisher","DOI":"10.1144\/jgs2014-110"},{"key":"e_1_3_2_6_1","doi-asserted-by":"publisher","DOI":"10.1017\/S0954102099000103"},{"key":"e_1_3_2_7_1","doi-asserted-by":"publisher","DOI":"10.1016\/S0012-821X(99)00190-9"},{"key":"e_1_3_2_8_1","doi-asserted-by":"publisher","DOI":"10.1017\/S0954102005002877"},{"key":"e_1_3_2_9_1","doi-asserted-by":"publisher","DOI":"10.1007\/s00410-006-0091-6"},{"key":"e_1_3_2_10_1","doi-asserted-by":"publisher","DOI":"10.1144\/jgs.157.2.417"},{"key":"e_1_3_2_11_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.lithos.2007.01.007"},{"key":"e_1_3_2_13_1","doi-asserted-by":"publisher","DOI":"10.1017\/S0016756806002603"},{"key":"e_1_3_2_14_1","doi-asserted-by":"publisher","DOI":"10.1017\/S0016756806002597"},{"key":"e_1_3_2_15_1","doi-asserted-by":"publisher","DOI":"10.1093\/gji\/ggu233"},{"key":"e_1_3_2_16_1","doi-asserted-by":"publisher","DOI":"10.1017\/S0016756800021464"},{"key":"e_1_3_2_17_1","doi-asserted-by":"publisher","DOI":"10.1017\/S0954102009990320"},{"key":"e_1_3_2_18_1","doi-asserted-by":"publisher","DOI":"10.1007\/s12303-012-0041-4"},{"key":"e_1_3_2_19_1","first-page":"353","volume-title":"The Antarctic Region: Geological Evolution and Processes","author":"Loske W.","year":"1997","unstructured":"Loske, W., Herv\u00e9, F., Miller, H. & Pankhurst, R.J. 1997. 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