Discovery of a magma chamber and faults beneath a Mid-Atlantic Ridge hydrothermal field.
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| Title: | Discovery of a magma chamber and faults beneath a Mid-Atlantic Ridge hydrothermal field. |
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| Authors: | Singh, Satish C., Crawford, Wayne C., Carton, Hélène, Seher, Tim, Combier, Violaine, Cannat, Mathilde, Canales, Juan Pablo, Düsünür, Doga, Escartin, Javier, Miranda, J. Miguel |
| Source: | Nature. 8/31/2006, Vol. 442 Issue 7106, p1029-1032. 4p. 1 Diagram, 2 Graphs. |
| Subjects: | Magmas, Volcanic plumes, Hydrothermal vents, Geologic faults |
| Geographic Terms: | Mid-Atlantic Ridge |
| Abstract: | Crust at slow-spreading ridges is formed by a combination of magmatic and tectonic processes, with magmatic accretion possibly involving short-lived crustal magma chambers. The reflections of seismic waves from crustal magma chambers have been observed beneath intermediate and fast-spreading centres, but it has been difficult to image such magma chambers beneath slow-spreading centres, owing to rough seafloor topography and associated seafloor scattering. In the absence of any images of magma chambers or of subsurface near-axis faults, it has been difficult to characterize the interplay of magmatic and tectonic processes in crustal accretion and hydrothermal circulation at slow-spreading ridges. Here we report the presence of a crustal magma chamber beneath the slow-spreading Lucky Strike segment of the Mid-Atlantic Ridge. The reflection from the top of the magma chamber, centred beneath the Lucky Strike volcano and hydrothermal field, is approximately 3 km beneath the sea floor, 3–4 km wide and extends up to 7 km along-axis. We suggest that this magma chamber provides the heat for the active hydrothermal vent field above it. We also observe axial valley bounding faults that seem to penetrate down to the magma chamber depth as well as a set of inward-dipping faults cutting through the volcanic edifice, suggesting continuous interactions between tectonic and magmatic processes. [ABSTRACT FROM AUTHOR] |
| Copyright of Nature is the property of Springer Nature 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: | Psychology and Behavioral Sciences Collection |
| FullText | Links: – Type: pdflink Text: Availability: 0 |
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| Header | DbId: pbh DbLabel: Psychology and Behavioral Sciences Collection An: 22271548 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Discovery of a magma chamber and faults beneath a Mid-Atlantic Ridge hydrothermal field. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Singh%2C+Satish+C%2E%22">Singh, Satish C.</searchLink><br /><searchLink fieldCode="AR" term="%22Crawford%2C+Wayne+C%2E%22">Crawford, Wayne C.</searchLink><br /><searchLink fieldCode="AR" term="%22Carton%2C+Hélène%22">Carton, Hélène</searchLink><br /><searchLink fieldCode="AR" term="%22Seher%2C+Tim%22">Seher, Tim</searchLink><br /><searchLink fieldCode="AR" term="%22Combier%2C+Violaine%22">Combier, Violaine</searchLink><br /><searchLink fieldCode="AR" term="%22Cannat%2C+Mathilde%22">Cannat, Mathilde</searchLink><br /><searchLink fieldCode="AR" term="%22Canales%2C+Juan+Pablo%22">Canales, Juan Pablo</searchLink><br /><searchLink fieldCode="AR" term="%22Düsünür%2C+Doga%22">Düsünür, Doga</searchLink><br /><searchLink fieldCode="AR" term="%22Escartin%2C+Javier%22">Escartin, Javier</searchLink><br /><searchLink fieldCode="AR" term="%22Miranda%2C+J%2E+Miguel%22">Miranda, J. Miguel</searchLink> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Nature%22">Nature</searchLink>. 8/31/2006, Vol. 442 Issue 7106, p1029-1032. 4p. 1 Diagram, 2 Graphs. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Magmas%22">Magmas</searchLink><br /><searchLink fieldCode="DE" term="%22Volcanic+plumes%22">Volcanic plumes</searchLink><br /><searchLink fieldCode="DE" term="%22Hydrothermal+vents%22">Hydrothermal vents</searchLink><br /><searchLink fieldCode="DE" term="%22Geologic+faults%22">Geologic faults</searchLink> – Name: SubjectGeographic Label: Geographic Terms Group: Su Data: <searchLink fieldCode="DE" term="%22Mid-Atlantic+Ridge%22">Mid-Atlantic Ridge</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: Crust at slow-spreading ridges is formed by a combination of magmatic and tectonic processes, with magmatic accretion possibly involving short-lived crustal magma chambers. The reflections of seismic waves from crustal magma chambers have been observed beneath intermediate and fast-spreading centres, but it has been difficult to image such magma chambers beneath slow-spreading centres, owing to rough seafloor topography and associated seafloor scattering. In the absence of any images of magma chambers or of subsurface near-axis faults, it has been difficult to characterize the interplay of magmatic and tectonic processes in crustal accretion and hydrothermal circulation at slow-spreading ridges. Here we report the presence of a crustal magma chamber beneath the slow-spreading Lucky Strike segment of the Mid-Atlantic Ridge. The reflection from the top of the magma chamber, centred beneath the Lucky Strike volcano and hydrothermal field, is approximately 3 km beneath the sea floor, 3–4 km wide and extends up to 7 km along-axis. We suggest that this magma chamber provides the heat for the active hydrothermal vent field above it. We also observe axial valley bounding faults that seem to penetrate down to the magma chamber depth as well as a set of inward-dipping faults cutting through the volcanic edifice, suggesting continuous interactions between tectonic and magmatic processes. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Nature is the property of Springer Nature 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: 10.1038/nature05105 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 4 StartPage: 1029 Subjects: – SubjectFull: Magmas Type: general – SubjectFull: Volcanic plumes Type: general – SubjectFull: Hydrothermal vents Type: general – SubjectFull: Geologic faults Type: general – SubjectFull: Mid-Atlantic Ridge Type: general Titles: – TitleFull: Discovery of a magma chamber and faults beneath a Mid-Atlantic Ridge hydrothermal field. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Singh, Satish C. – PersonEntity: Name: NameFull: Crawford, Wayne C. – PersonEntity: Name: NameFull: Carton, Hélène – PersonEntity: Name: NameFull: Seher, Tim – PersonEntity: Name: NameFull: Combier, Violaine – PersonEntity: Name: NameFull: Cannat, Mathilde – PersonEntity: Name: NameFull: Canales, Juan Pablo – PersonEntity: Name: NameFull: Düsünür, Doga – PersonEntity: Name: NameFull: Escartin, Javier – PersonEntity: Name: NameFull: Miranda, J. Miguel IsPartOfRelationships: – BibEntity: Dates: – D: 31 M: 08 Text: 8/31/2006 Type: published Y: 2006 Identifiers: – Type: issn-print Value: 00280836 Numbering: – Type: volume Value: 442 – Type: issue Value: 7106 Titles: – TitleFull: Nature Type: main |
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