Tectonic Implications of Deep-Marine Miocene Strata in the Western Andean Cordillera of South–Central Chile (40°–42°S)

Alfonso Encinas, Patricio Zambrano, Pablo Bernabé, Kenneth Finger, Luis Buatois, Victor Valencia, Mark Fanning, Francisco Hervé

Research output: Chapter in Book/Report/Conference proceedingChapterpeer-review

Abstract

Marine Cenozoic strata crop out in the western flank of the North Patagonian Andes at Lago Ranco (40°S) and Ayacara (42°S). These deposits, known as the Estratos de Lago Ranco and Ayacara formations, consist of rhythmic successions of sandstone and siltstone. In order to unravel the sedimentary environment, age, and tectonic history of this area during the Neogene, we conducted sedimentological, ichnological, and micropalaeontological studies. In addition, we dated detrital zircons by U–Pb (LAICPMS and SHRIMP). Our results show that these strata were deposited in a deep-marine environment during the early–middle Miocene. Our findings indicate that the uplift of the western flank of the North Patagonian Andes took place after the early–middle Miocene.

Original languageEnglish
Title of host publicationSpringer Geology
PublisherSpringer
Pages499-501
Number of pages3
DOIs
Publication statusPublished - 1 Jan 2014
Externally publishedYes

Publication series

NameSpringer Geology
ISSN (Print)2197-9545
ISSN (Electronic)2197-9553

Keywords

  • North Patagonian Andes
  • Southern Chile
  • U–Pb

ASJC Scopus subject areas

  • General Earth and Planetary Sciences

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