Geochemical model of a magmatic-hydrothermal system at the Lastarria volcano, northern Chile.
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| Title: | Geochemical model of a magmatic-hydrothermal system at the Lastarria volcano, northern Chile. |
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| Authors: | Aguilera, Felipe1 felipe.aguilera@uda.cl, Tassi, F., Darrah, T., Moune, S.2, Vaselli, O. |
| Source: | Bulletin of Volcanology. Jan2012, Vol. 74 Issue 1, p119-134. 16p. |
| Subject Terms: | *Volcanoes, *Volcanism, *Aquifers, *Gases |
| Geographic Terms: | Chile |
| Abstract: | Lastarria volcano (25°10′ S, 68°31′ W; 5,697 m above sea level), located in the Central Andes Volcanic Zone (northern Chile), is characterized by four distinct fumarolic fields with outlet temperatures ranging between 80°C and 408°C as measured between May 2006-March 2008 and April-June 2009. Fumarolic gasses contain significant concentrations of high temperature gas compounds (i.e., SO, HCl, HF, H, and CO), and isotopic ratios (He/He, δC-CO, δO-HO, and δD-HO) diagnostic of magmatic gas sources. Gas equilibria systematics, in both the HO-H-CO-CO-CH and alkane-alkene C system, suggest that Lastarria fumarolic gasses emanate from a superheated vapor that is later cooled and condensed at relatively shallow depths. This two-stage process inhibits the formation of a continuous aquifer (e.g., horizontal liquid layer) at relatively shallow depth. Recent developments in the magmatic gas system may have enhanced the transfer and release of heat causing shallow aquifer vaporization. The consequent pressure increase and aquifer vaporization likely triggered the inflation events beginning in 2003 at the Lastarria volcano. [ABSTRACT FROM AUTHOR] |
| Database: | Energy & Power Source |
| FullText | Links: – Type: pdflink Text: Availability: 0 |
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| Header | DbId: enr DbLabel: Energy & Power Source An: 70129281 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Geochemical model of a magmatic-hydrothermal system at the Lastarria volcano, northern Chile. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Aguilera%2C+Felipe%22">Aguilera, Felipe</searchLink><relatesTo>1</relatesTo><i> felipe.aguilera@uda.cl</i><br /><searchLink fieldCode="AR" term="%22Tassi%2C+F%2E%22">Tassi, F.</searchLink><br /><searchLink fieldCode="AR" term="%22Darrah%2C+T%2E%22">Darrah, T.</searchLink><br /><searchLink fieldCode="AR" term="%22Moune%2C+S%2E%22">Moune, S.</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Vaselli%2C+O%2E%22">Vaselli, O.</searchLink> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Bulletin+of+Volcanology%22">Bulletin of Volcanology</searchLink>. Jan2012, Vol. 74 Issue 1, p119-134. 16p. – Name: Subject Label: Subject Terms Group: Su Data: *<searchLink fieldCode="DE" term="%22Volcanoes%22">Volcanoes</searchLink><br />*<searchLink fieldCode="DE" term="%22Volcanism%22">Volcanism</searchLink><br />*<searchLink fieldCode="DE" term="%22Aquifers%22">Aquifers</searchLink><br />*<searchLink fieldCode="DE" term="%22Gases%22">Gases</searchLink> – Name: SubjectGeographic Label: Geographic Terms Group: Su Data: <searchLink fieldCode="DE" term="%22Chile%22">Chile</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: Lastarria volcano (25°10′ S, 68°31′ W; 5,697 m above sea level), located in the Central Andes Volcanic Zone (northern Chile), is characterized by four distinct fumarolic fields with outlet temperatures ranging between 80°C and 408°C as measured between May 2006-March 2008 and April-June 2009. Fumarolic gasses contain significant concentrations of high temperature gas compounds (i.e., SO, HCl, HF, H, and CO), and isotopic ratios (He/He, δC-CO, δO-HO, and δD-HO) diagnostic of magmatic gas sources. Gas equilibria systematics, in both the HO-H-CO-CO-CH and alkane-alkene C system, suggest that Lastarria fumarolic gasses emanate from a superheated vapor that is later cooled and condensed at relatively shallow depths. This two-stage process inhibits the formation of a continuous aquifer (e.g., horizontal liquid layer) at relatively shallow depth. Recent developments in the magmatic gas system may have enhanced the transfer and release of heat causing shallow aquifer vaporization. The consequent pressure increase and aquifer vaporization likely triggered the inflation events beginning in 2003 at the Lastarria volcano. [ABSTRACT FROM AUTHOR] |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1007/s00445-011-0489-5 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 16 StartPage: 119 Subjects: – SubjectFull: Volcanoes Type: general – SubjectFull: Volcanism Type: general – SubjectFull: Aquifers Type: general – SubjectFull: Gases Type: general – SubjectFull: Chile Type: general Titles: – TitleFull: Geochemical model of a magmatic-hydrothermal system at the Lastarria volcano, northern Chile. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Aguilera, Felipe – PersonEntity: Name: NameFull: Tassi, F. – PersonEntity: Name: NameFull: Darrah, T. – PersonEntity: Name: NameFull: Moune, S. – PersonEntity: Name: NameFull: Vaselli, O. IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 01 Text: Jan2012 Type: published Y: 2012 Identifiers: – Type: issn-print Value: 02588900 Numbering: – Type: volume Value: 74 – Type: issue Value: 1 Titles: – TitleFull: Bulletin of Volcanology Type: main |
| ResultId | 1 |
