Possible sources for monogenetic Pliocene-Quaternary basaltic volcanism in northern Patagonia

Gabriela I. Massaferro, Miguel J. Haller, Jarda Dostal, Z. Pécskay, Horacio Prez, Carlos Meister, Viviana Alric

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

The Pliocene- Quaternary times in Extra-Andean Patagonia are characterized by the effusion of intraplate basalts. This work is focused on those basalts outcropping between 40° and 46°S. The age of this volcanism varies between 0.23 and 5Ma.Based on the general geochemical characteristics, geographic distribution, and structural framework of the region, we propose that the basalts originated in response to the back arc extension that caused the thinning, doming and fracturing of the lithosphere, and extrusion of mafic magmas with a relatively primitive nature and OIB-like compositions. The geochemical characteristics allow to distinguish three types of basalts: basanites, alkaline basalts and tholeiitic basalts, each one representing different sources and percentages of partial melt and implying a heterogeneous source. A source with these characteristics could be the lithospheric mantle.

Original languageEnglish
Pages (from-to)29-42
Number of pages14
JournalJournal of South American Earth Sciences
Volume55
DOIs
Publication statusPublished - 2014

Fingerprint

volcanism
Pliocene
basalt
tholeiitic basalt
ocean island basalt
extrusion
thinning
lithosphere
melt
mantle

Keywords

  • Basaltic volcanism
  • Patagonia
  • Petrology
  • Quaternary

ASJC Scopus subject areas

  • Earth-Surface Processes
  • Geology

Cite this

Possible sources for monogenetic Pliocene-Quaternary basaltic volcanism in northern Patagonia. / Massaferro, Gabriela I.; Haller, Miguel J.; Dostal, Jarda; Pécskay, Z.; Prez, Horacio; Meister, Carlos; Alric, Viviana.

In: Journal of South American Earth Sciences, Vol. 55, 2014, p. 29-42.

Research output: Contribution to journalArticle

Massaferro, Gabriela I. ; Haller, Miguel J. ; Dostal, Jarda ; Pécskay, Z. ; Prez, Horacio ; Meister, Carlos ; Alric, Viviana. / Possible sources for monogenetic Pliocene-Quaternary basaltic volcanism in northern Patagonia. In: Journal of South American Earth Sciences. 2014 ; Vol. 55. pp. 29-42.
@article{b1abec83dbd447298ae52e312918e00d,
title = "Possible sources for monogenetic Pliocene-Quaternary basaltic volcanism in northern Patagonia",
abstract = "The Pliocene- Quaternary times in Extra-Andean Patagonia are characterized by the effusion of intraplate basalts. This work is focused on those basalts outcropping between 40° and 46°S. The age of this volcanism varies between 0.23 and 5Ma.Based on the general geochemical characteristics, geographic distribution, and structural framework of the region, we propose that the basalts originated in response to the back arc extension that caused the thinning, doming and fracturing of the lithosphere, and extrusion of mafic magmas with a relatively primitive nature and OIB-like compositions. The geochemical characteristics allow to distinguish three types of basalts: basanites, alkaline basalts and tholeiitic basalts, each one representing different sources and percentages of partial melt and implying a heterogeneous source. A source with these characteristics could be the lithospheric mantle.",
keywords = "Basaltic volcanism, Patagonia, Petrology, Quaternary",
author = "Massaferro, {Gabriela I.} and Haller, {Miguel J.} and Jarda Dostal and Z. P{\'e}cskay and Horacio Prez and Carlos Meister and Viviana Alric",
year = "2014",
doi = "10.1016/j.jsames.2014.07.001",
language = "English",
volume = "55",
pages = "29--42",
journal = "Journal of South American Earth Sciences",
issn = "0895-9811",
publisher = "Elsevier BV",

}

TY - JOUR

T1 - Possible sources for monogenetic Pliocene-Quaternary basaltic volcanism in northern Patagonia

AU - Massaferro, Gabriela I.

AU - Haller, Miguel J.

AU - Dostal, Jarda

AU - Pécskay, Z.

AU - Prez, Horacio

AU - Meister, Carlos

AU - Alric, Viviana

PY - 2014

Y1 - 2014

N2 - The Pliocene- Quaternary times in Extra-Andean Patagonia are characterized by the effusion of intraplate basalts. This work is focused on those basalts outcropping between 40° and 46°S. The age of this volcanism varies between 0.23 and 5Ma.Based on the general geochemical characteristics, geographic distribution, and structural framework of the region, we propose that the basalts originated in response to the back arc extension that caused the thinning, doming and fracturing of the lithosphere, and extrusion of mafic magmas with a relatively primitive nature and OIB-like compositions. The geochemical characteristics allow to distinguish three types of basalts: basanites, alkaline basalts and tholeiitic basalts, each one representing different sources and percentages of partial melt and implying a heterogeneous source. A source with these characteristics could be the lithospheric mantle.

AB - The Pliocene- Quaternary times in Extra-Andean Patagonia are characterized by the effusion of intraplate basalts. This work is focused on those basalts outcropping between 40° and 46°S. The age of this volcanism varies between 0.23 and 5Ma.Based on the general geochemical characteristics, geographic distribution, and structural framework of the region, we propose that the basalts originated in response to the back arc extension that caused the thinning, doming and fracturing of the lithosphere, and extrusion of mafic magmas with a relatively primitive nature and OIB-like compositions. The geochemical characteristics allow to distinguish three types of basalts: basanites, alkaline basalts and tholeiitic basalts, each one representing different sources and percentages of partial melt and implying a heterogeneous source. A source with these characteristics could be the lithospheric mantle.

KW - Basaltic volcanism

KW - Patagonia

KW - Petrology

KW - Quaternary

UR - http://www.scopus.com/inward/record.url?scp=84904901762&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84904901762&partnerID=8YFLogxK

U2 - 10.1016/j.jsames.2014.07.001

DO - 10.1016/j.jsames.2014.07.001

M3 - Article

AN - SCOPUS:84904901762

VL - 55

SP - 29

EP - 42

JO - Journal of South American Earth Sciences

JF - Journal of South American Earth Sciences

SN - 0895-9811

ER -