{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,5]],"date-time":"2026-04-05T01:15:05Z","timestamp":1775351705841,"version":"3.50.1"},"reference-count":63,"publisher":"Geological Society of London","issue":"2","license":[{"start":{"date-parts":[[2019,12,9]],"date-time":"2019-12-09T00:00:00Z","timestamp":1575849600000},"content-version":"stm-asf","delay-in-days":0,"URL":"https:\/\/doi.org\/10.15223\/policy-002"}],"funder":[{"DOI":"10.13039\/501100008736","name":"Fondo de Fomento al Desarrollo Cient\u00edfico y Tecnol\u00f3gico","doi-asserted-by":"crossref","award":["11140012"],"award-info":[{"award-number":["11140012"]}],"id":[{"id":"10.13039\/501100008736","id-type":"DOI","asserted-by":"crossref"}]},{"DOI":"10.13039\/501100002848","name":"Comisi\u00f3n Nacional de Investigaci\u00f3n Cient\u00edfica y Tecnol\u00f3gica","doi-asserted-by":"crossref","award":["PAI79160139"],"award-info":[{"award-number":["PAI79160139"]}],"id":[{"id":"10.13039\/501100002848","id-type":"DOI","asserted-by":"crossref"}]},{"name":"Universidad Andres Bello"},{"DOI":"10.13039\/501100008736","name":"Fondo de Fomento al Desarrollo Cient\u00edfico y Tecnol\u00f3gico","doi-asserted-by":"crossref","award":["1161806"],"award-info":[{"award-number":["1161806"]}],"id":[{"id":"10.13039\/501100008736","id-type":"DOI","asserted-by":"crossref"}]}],"content-domain":{"domain":["www.lyellcollection.org"],"crossmark-restriction":true},"short-container-title":["JGS"],"published-print":{"date-parts":[[2020,3]]},"abstract":"<jats:p>\n            The scarce Eocene geological record in the Andean region of Central Chile (\n            <jats:italic>c.<\/jats:italic>\n            33.6\u00b0 S) is represented by the Estratos del Cord\u00f3n de los Ratones unit. This is a\n            <jats:italic>c.<\/jats:italic>\n            450\u2005m thick, mainly volcanic, continental series with a bimodal character that hosts numerous subvolcanic intrusions. The igneous products show compositional features indicating a co-genetic character for the whole suite, relatively juvenile mantle signatures and arc-like affinities. This, along with age determinations of\n            <jats:italic>c.<\/jats:italic>\n            42\u2005Ma, indicate that the unit corresponds to the middle Eocene arc in the region. The geochemical data obtained complement the evolving arc magmatic record throughout Andean evolution. This allows us to track: (1) the earliest Late Cretaceous orogenic event; (2) neutral tectonic conditions from the latest Cretaceous to mid-Eocene times; (3) the Oligocene\u2013early Miocene extensional episode; and (4) the onset of the prevailing compression. The record also indicates that the extensional event started no earlier than the mid-Eocene, with the deposition of the Estratos del Cord\u00f3n de los Ratones, and no later than the earliest Oligocene. In addition, orogenic processes developed from early Miocene times are highlighted relative to those developed during the early Late Cretaceous, at least in the arc region.\n          <\/jats:p>\n          <jats:p content-type=\"supplementary-material\">\n            Supplementary material: Analytical methods (Item 1), the full dataset of U\u2013Pb age determinations by SHRIMP (Item 2) and LA-ICP-MS (Item 3), and additional geochronological diagrams (Item 4) are available at\n            <jats:ext-link xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" ext-link-type=\"uri\" specific-use=\"dataset is-supplemented-by\" xlink:href=\"https:\/\/doi.org\/10.6084\/m9.figshare.c.4710305\">https:\/\/doi.org\/10.6084\/m9.figshare.c.4710305<\/jats:ext-link>\n          <\/jats:p>","DOI":"10.1144\/jgs2019-042","type":"journal-article","created":{"date-parts":[[2019,10,31]],"date-time":"2019-10-31T01:55:20Z","timestamp":1572486920000},"page":"258-275","update-policy":"https:\/\/doi.org\/10.1144\/crossmark-policy","source":"Crossref","is-referenced-by-count":11,"title":["Eocene arc petrogenesis in Central Chile (\n            <i>c.<\/i>\n            33.6\u00b0 S) and implications for the Late Cretaceous\u2013Miocene Andean setting: tracking the evolving tectonic regime"],"prefix":"10.1144","volume":"177","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-9175-147X","authenticated-orcid":false,"given":"Marcia","family":"Mu\u00f1oz-G\u00f3mez","sequence":"first","affiliation":[{"name":"Escuela de Ciencias de la Tierra, Facultad de Ingenier\u00eda, Universidad Andres Bello, Campus Rep\u00fablica, Salvador Sanfuentes 2357, Santiago, Chile"},{"name":"Advanced Mining Technology Center, Facultad de Ciencias F\u00edsicas y Matem\u00e1ticas, Universidad de Chile, Av. Tupper 2007, Santiago, Chile"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5619-7373","authenticated-orcid":false,"given":"Constanza","family":"Fuentes","sequence":"additional","affiliation":[{"name":"Advanced Mining Technology Center, Facultad de Ciencias F\u00edsicas y Matem\u00e1ticas, Universidad de Chile, Av. Tupper 2007, Santiago, Chile"},{"name":"Departamento de Geolog\u00eda, Universidad de Chile, Casilla 13518, Correo 21, Santiago, Chile"}]},{"given":"Francisco","family":"Fuentes","sequence":"additional","affiliation":[{"name":"Facultad de Ingenier\u00eda y Arquitectura, Universidad Central de Chile, Santa Isabel 1186, Santiago Chile"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5397-3071","authenticated-orcid":false,"given":"Felipe","family":"Tapia","sequence":"additional","affiliation":[{"name":"Facultad de Ingenier\u00eda y Arquitectura, Universidad Central de Chile, Santa Isabel 1186, Santiago Chile"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0134-4863","authenticated-orcid":false,"given":"Mathieu","family":"Benoit","sequence":"additional","affiliation":[{"name":"CNRS-UBO, UMR 6538, IUEM, Place N. Copernic, 29280 Plouzan\u00e9, France"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3264-341X","authenticated-orcid":false,"given":"Marcelo","family":"Far\u00edas","sequence":"additional","affiliation":[{"name":"Departamento de Geolog\u00eda, Universidad de Chile, Casilla 13518, Correo 21, Santiago, Chile"}]},{"given":"C. Mark","family":"Fanning","sequence":"additional","affiliation":[{"name":"Research School of Earth Sciences, Australian National University, Canberra, ACT 0200, Australia"}]},{"given":"Andr\u00e9s","family":"Fock","sequence":"additional","affiliation":[{"name":"SQM S.A., Los Militares 4290, Santiago, Chile"}]},{"given":"Reynaldo","family":"Charrier","sequence":"additional","affiliation":[{"name":"Escuela de Ciencias de la Tierra, Facultad de Ingenier\u00eda, Universidad Andres Bello, Campus Rep\u00fablica, Salvador Sanfuentes 2357, Santiago, Chile"},{"name":"Departamento de Geolog\u00eda, Universidad de Chile, Casilla 13518, Correo 21, Santiago, Chile"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1296-3499","authenticated-orcid":false,"given":"Daniel","family":"Sell\u00e9s","sequence":"additional","affiliation":[{"name":"AURUM Consultores, Del Inca 4446 of 701, Las Condes, Santiago, Chile"}]},{"given":"Daniela","family":"Bustamante","sequence":"additional","affiliation":[{"name":"Escuela de Ciencias de la Tierra, Facultad de Ingenier\u00eda, Universidad Andres Bello, Campus Rep\u00fablica, Salvador Sanfuentes 2357, Santiago, Chile"}]}],"member":"1881","published-online":{"date-parts":[[2019,12,9]]},"reference":[{"key":"e_1_3_4_2_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.jsames.2004.06.001"},{"key":"e_1_3_4_4_1","doi-asserted-by":"publisher","DOI":"10.1111\/bre.12106"},{"key":"e_1_3_4_6_1","unstructured":"Blanco N. 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Revista de la Asociaci\u00f3n Geol\u00f3gica Argentina, 65, 5\u201335.","journal-title":"Revista de la Asociaci\u00f3n Geol\u00f3gica Argentina"},{"key":"e_1_3_4_14_1","doi-asserted-by":"publisher","DOI":"10.1144\/SP399.20"},{"key":"e_1_3_4_15_1","volume-title":"Geolog\u00eda del \u00e1rea San Fernando - Curic\u00f3","author":"Contreras J.P.","unstructured":"Contreras, J.P. & Schilling, M. in press. Geolog\u00eda del \u00e1rea San Fernando - Curic\u00f3. Servicio Nacional de Geolog\u00eda y Miner\u00eda, Carta Geol\u00f3gica de Chile, Serie Geol\u00f3gica B\u00e1sica, Santiago."},{"key":"e_1_3_4_16_1","unstructured":"Cornejo P. & Matthews S. 2001. Evolution of magmatism from the uppermost Cretaceous to Oligocene and its relationship to changing tectonic regime in the Inca de Oro-El Salvador area (Northern Chile). 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