Late Pleistocene to Holocene temporal succession and magnitudes of highly-explosive volcanic eruptions in west-central Nicaragua
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| Title: | Late Pleistocene to Holocene temporal succession and magnitudes of highly-explosive volcanic eruptions in west-central Nicaragua |
|---|---|
| Authors: | Kutterolf, S.1 skutterolf@ifm-geomar.de, Freundt, A.1,2, Pérez, W.1, Wehrmann, H.1, Schmincke, H.-U.1,2 |
| Source: | Journal of Volcanology & Geothermal Research. Jun2007, Vol. 163 Issue 1-4, p55-82. 28p. |
| Subjects: | Volcanic ash, tuff, etc., Volcanism, Stratigraphic geology, Stratigraphic correlation |
| Abstract: | Abstract: The stratigraphic succession of widespread tephra layers in west-central Nicaragua was emplaced by highly explosive eruptions from mainly three volcanoes: the Chiltepe volcanic complex and the Masaya and Apoyo calderas. Stratigraphic correlations are based on distinct compositions of tephras. The total tephras combine to a total on-shore volume of about 37 km3 produced during the last ∼60 ka. The total erupted magma mass, including also distal volumes, of 184 Gt (DRE) distributes to 84% into 9 dacitic to rhyolitic eruptions and to 16% into 4 basaltic to basaltic–andesitic eruptions. The widely dispersed tephra sheets have up to five times the mass of their parental volcanic edifices and thus represent a significant albeit less obvious component of the arc volcanism. Eruption magnitudes (M =log10(m)−7 with m the mass in kg), range from M =4.1 to M =6.3. Most of the eruptions were dominantly plinian, with eruption columns reaching variably high into the stratosphere, but minor phreatomagmatic phases were also involved. Two phreatomagmatic eruptions, one dacitic and one basaltic–andesitic, produced mostly pyroclastic surges but also fallout from high eruption columns. Comparison of fallout tephra dispersal patterns with present-day, seasonally changing height-dependant wind directions suggests that 8 eruptions occurred during the rainy season while 5 took place during the dry season. The tephra succession documents two major phases of erosion. The first phase, >17 ka ago, appears to be related to tectonic activity whereas the second phase may have been caused by wet climatic conditions between 2 to 6 ka ago. The Apoyo caldera had two large plinian, caldera-forming eruptions in rapid succession about 24 ka ago and should be considered a silicic volcano with long repose times. Three highly explosive basaltic eruptions were generated at the Masaya Caldera within the last 6 ka. Since then frequent but small eruptions and lava effusion were largely limited to the caldera interior. The dacitic Chiltepe volcanic complex experienced six plinian eruptions during the last 17 ka and seems to be an accelerating system in which eruption magnitude increased while the degree of differentiation of erupted magma decreased at the same time. We speculate that the Chiltepe system might produce the next large-magnitude silicic eruption in west-central Nicaragua. [Copyright &y& Elsevier] |
| Copyright of Journal of Volcanology & Geothermal Research is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
| FullText | Text: Availability: 0 |
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| Header | DbId: egs DbLabel: Engineering Source An: 25320326 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Late Pleistocene to Holocene temporal succession and magnitudes of highly-explosive volcanic eruptions in west-central Nicaragua – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Kutterolf%2C+S%2E%22">Kutterolf, S.</searchLink><relatesTo>1</relatesTo><i> skutterolf@ifm-geomar.de</i><br /><searchLink fieldCode="AR" term="%22Freundt%2C+A%2E%22">Freundt, A.</searchLink><relatesTo>1,2</relatesTo><br /><searchLink fieldCode="AR" term="%22Pérez%2C+W%2E%22">Pérez, W.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Wehrmann%2C+H%2E%22">Wehrmann, H.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Schmincke%2C+H%2E-U%2E%22">Schmincke, H.-U.</searchLink><relatesTo>1,2</relatesTo> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Journal+of+Volcanology+%26+Geothermal+Research%22">Journal of Volcanology & Geothermal Research</searchLink>. Jun2007, Vol. 163 Issue 1-4, p55-82. 28p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Volcanic+ash%2C+tuff%2C+etc%2E%22">Volcanic ash, tuff, etc.</searchLink><br /><searchLink fieldCode="DE" term="%22Volcanism%22">Volcanism</searchLink><br /><searchLink fieldCode="DE" term="%22Stratigraphic+geology%22">Stratigraphic geology</searchLink><br /><searchLink fieldCode="DE" term="%22Stratigraphic+correlation%22">Stratigraphic correlation</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: Abstract: The stratigraphic succession of widespread tephra layers in west-central Nicaragua was emplaced by highly explosive eruptions from mainly three volcanoes: the Chiltepe volcanic complex and the Masaya and Apoyo calderas. Stratigraphic correlations are based on distinct compositions of tephras. The total tephras combine to a total on-shore volume of about 37 km3 produced during the last ∼60 ka. The total erupted magma mass, including also distal volumes, of 184 Gt (DRE) distributes to 84% into 9 dacitic to rhyolitic eruptions and to 16% into 4 basaltic to basaltic–andesitic eruptions. The widely dispersed tephra sheets have up to five times the mass of their parental volcanic edifices and thus represent a significant albeit less obvious component of the arc volcanism. Eruption magnitudes (M =log10(m)−7 with m the mass in kg), range from M =4.1 to M =6.3. Most of the eruptions were dominantly plinian, with eruption columns reaching variably high into the stratosphere, but minor phreatomagmatic phases were also involved. Two phreatomagmatic eruptions, one dacitic and one basaltic–andesitic, produced mostly pyroclastic surges but also fallout from high eruption columns. Comparison of fallout tephra dispersal patterns with present-day, seasonally changing height-dependant wind directions suggests that 8 eruptions occurred during the rainy season while 5 took place during the dry season. The tephra succession documents two major phases of erosion. The first phase, >17 ka ago, appears to be related to tectonic activity whereas the second phase may have been caused by wet climatic conditions between 2 to 6 ka ago. The Apoyo caldera had two large plinian, caldera-forming eruptions in rapid succession about 24 ka ago and should be considered a silicic volcano with long repose times. Three highly explosive basaltic eruptions were generated at the Masaya Caldera within the last 6 ka. Since then frequent but small eruptions and lava effusion were largely limited to the caldera interior. The dacitic Chiltepe volcanic complex experienced six plinian eruptions during the last 17 ka and seems to be an accelerating system in which eruption magnitude increased while the degree of differentiation of erupted magma decreased at the same time. We speculate that the Chiltepe system might produce the next large-magnitude silicic eruption in west-central Nicaragua. [Copyright &y& Elsevier] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Journal of Volcanology & Geothermal Research is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1016/j.jvolgeores.2007.02.006 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 28 StartPage: 55 Subjects: – SubjectFull: Volcanic ash, tuff, etc. Type: general – SubjectFull: Volcanism Type: general – SubjectFull: Stratigraphic geology Type: general – SubjectFull: Stratigraphic correlation Type: general Titles: – TitleFull: Late Pleistocene to Holocene temporal succession and magnitudes of highly-explosive volcanic eruptions in west-central Nicaragua Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Kutterolf, S. – PersonEntity: Name: NameFull: Freundt, A. – PersonEntity: Name: NameFull: Pérez, W. – PersonEntity: Name: NameFull: Wehrmann, H. – PersonEntity: Name: NameFull: Schmincke, H.-U. IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 06 Text: Jun2007 Type: published Y: 2007 Identifiers: – Type: issn-print Value: 03770273 Numbering: – Type: volume Value: 163 – Type: issue Value: 1-4 Titles: – TitleFull: Journal of Volcanology & Geothermal Research Type: main |
| ResultId | 1 |
