Pacific offshore record of plinian arc volcanism in Central America: 1. Along-arc correlations

Kutterolf, Steffen, Freundt, Armin, Perez, Wendy, Mörz, T., Schacht, U., Wehrmann, Heidi and Schmincke, Hans-Ulrich (2008) Pacific offshore record of plinian arc volcanism in Central America: 1. Along-arc correlations Geochemistry Geophysics Geosystems, 9 (Q02S01). DOI 10.1029/2007GC001631.

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We collected 56 marine gravity cores from the Pacific seafloor offshore Central America which contain a total of 213 volcanic ash beds. Ash-layer correlations between cores and with their parental tephras on land use stratigraphic, lithologic, and compositional criteria. In particular, we make use of our newly built database of bulk-rock, mineral, and glass major and trace element compositions of plinian and similarly widespread tephras erupted since the Pleistocene along the Central American Volcanic Arc. We thus identify the distal ashes of 11 Nicaraguan, 8 El Salvadorian, 6 Guatemalan, and 1 Costa Rican eruptions. Relatively uniform pelagic sedimentation rates allow us to determine ages of 10 previously undated tephras by their relative position between ash layers of known age. Linking the marine and terrestrial records yields a tephrostratigraphic framework for the Central American volcanic arc from Costa Rica to Guatemala. This is a useful tool and prerequisite to understand the evolution of volcanism at a whole-arc scale.

Document Type: Article
Keywords: marine tephra; Central America; plinian volcanism; offshore geology; submarine slides; mud mounds; M66/3; M54/2; SO173/3
Research affiliation: OceanRep > SFB 574 > C4
OceanRep > SFB 574
OceanRep > GEOMAR > FB4 Dynamics of the Ocean Floor > FB4-MUHS Magmatic and Hydrothermal Systems
Refereed: Yes
DOI etc.: 10.1029/2007GC001631
ISSN: 1525-2027
Projects: Future Ocean, SFB574
Contribution Number:
SFB 57499
Date Deposited: 03 Dec 2008 16:51
Last Modified: 07 Mar 2018 11:00

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