A detection of Milankovitch frequencies in global volcanic activity.

Kutterolf, Steffen , Jegen, Marion , Mitrovica, Jerry X., Kwasnitschka, Tom, Freundt, Armin and Huybers, Peter J. (2013) A detection of Milankovitch frequencies in global volcanic activity. Geology, 41 (2). pp. 227-230. DOI 10.1130/G33419.1.

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A rigorous detection of Milankovitch periodicities in volcanic output across the Pleistocene-Holocene ice age has remained elusive. We report on a spectral analysis of a large number of well-preserved ash plume deposits recorded in marine sediments along the Pacific Ring of Fire. Our analysis yields a statistically significant detection of a spectral peak at the obliquity period. We propose that this variability in volcanic activity results from crustal stress changes
associated with ice age mass redistribution. In particular, increased volcanism lags behind the highest rate of increasing eustatic sea level (decreasing global ice volume) by 4.0 ± 3.6 k.y. and correlates with numerical predictions of stress changes at volcanically active sites. These results support the presence of a causal link between variations in ice age climate, continental stress field, and volcanism.

Document Type: Article
Keywords: Milankovitch frequencies; volcanism; spectral analysis
Research affiliation: OceanRep > SFB 574 > C4
OceanRep > SFB 574
OceanRep > GEOMAR > FB4 Dynamics of the Ocean Floor > FB4-MUHS
OceanRep > GEOMAR > FB4 Dynamics of the Ocean Floor > FB4-GDY Marine Geodynamics
Refereed: Yes
Open Access Journal?: No
DOI etc.: 10.1130/G33419.1
ISSN: 0091-7613
Projects: SFB574, Future Ocean
Contribution Number:
SFB 574138
Date Deposited: 10 Dec 2012 16:58
Last Modified: 23 Sep 2019 20:38
URI: http://oceanrep.geomar.de/id/eprint/19607

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