georefid:2013-010738SEDIS Publication Catalogueana.macario@awi.dehttp://sedis.iodp.org/pub-catalogue/informationpointOfContact2013-07-08T00:00:00Zhttp://sedis.iodp.org/pub-catalogue/index.php?id=10.1130/G33419.1<gco:CharacterString>A detection of Milankovitch frequencies in global volcanic activity</gco:CharacterString>2012-01-01publicationgeorefid:2013-010738doi:10.1130/G33419.1Kutterolf, SteffenHelmholtz Centre for Ocean Research, Collaborative Research Center, Kiel, GermanyauthorJegen, MarionHarvard University, United StatesauthorMitrovica, Jerry X.authorKwasnitschka, TomauthorFreundt, ArminauthorHuybers, Peter J.authorGeological Society of America (GSA), Boulder, CO, United StatespublisherdocumentHardcopyGeology (Boulder)41 (2)227-230A 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 + or - 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.completedQuaternary geologyCenozoicCentral AmericachemostratigraphyCircum-Pacific regioncorescrustcyclesDeep Sea Drilling ProjectFourier analysisfrequencyHoloceneiceIntegrated Ocean Drilling Programisotope ratiosisotopeslower Holocenemarine sedimentsMilankovitch theoryO-18/O-16obliquity of the eclipticOcean Drilling ProgramoxygenPacific regionPleistoceneQuaternarysea-level changessedimentsspectrastable isotopesstatistical analysisstresstephrostratigraphytime series analysisupper PleistoceneEnglishgeoscientificInformation-92.1500-77.10007.100018.3000Central AmericaGSA Data Repository item 2013055