Heat flow and crustal thermal structure in the Late Archaean Closepet Granite batholith, south India.
Saved in:
| Title: | Heat flow and crustal thermal structure in the Late Archaean Closepet Granite batholith, south India. |
|---|---|
| Authors: | Roy, Sukanta1 (AUTHOR) sukantaroy@yahoo.com, Ray, Labani1 (AUTHOR) labani_ngri@rediffmail.com, Bhattacharya, Anurup1 (AUTHOR) srinivasanmalathi@rediffmail.com, R., Srinivasan1 (AUTHOR) |
| Source: | International Journal of Earth Sciences. Apr2008, Vol. 97 Issue 2, p245-256. 12p. 3 Black and White Photographs, 2 Charts, 1 Graph. |
| Abstract: | The Late Archaean Closepet Granite batholith in south India is exposed at different crustal levels grading from greenschist facies in the north through amphibolite and granulite facies in the south along a ~ 400 km long segment in the Dharwar craton. Two areas, Pavagada and Magadi, located in the Main Mass of the batholith, best represent the granitoid of the greenschist and amphibolite facies crustal levels respectively. Heat flow estimates of 38 mW m–2 from Pavagada and 25 mW m–2 from Magadi have been obtained through measurements in deep (430 and 445 m) and carefully sited boreholes. Measurements made in four boreholes of opportunity in Pavagada area yield a mean heat flow of 39 ± 4 (s.d.) mW m–2, which is in good agreement with the estimate from deep borehole. The study, therefore, demonstrates a clear-cut heat flow variation concomitant with the crustal levels exposed in the two areas. The mean heat production estimates for the greenschist facies and amphibolite facies layers constituting the Main Mass of the batholith are 2.9 and 1.8 lWm–3, respectively. The enhanced heat flow in the Pavagada area is consistent with the occurrence of a radioelement-enriched 2-km-thick greenschist facies layer granitoid overlying the granitoid of the amphibolite facies layer which is twice as thick as represented in the Magadi area. The crustal heat production models indicate similar mantle heat flow estimates in the range 12–14 mW m–2, consistent with the other parts of the greenstone-granite-gneiss terrain of the Dharwar craton. [ABSTRACT FROM AUTHOR] |
| Copyright of International Journal of Earth Sciences 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: | Engineering Source |
| FullText | Text: Availability: 0 |
|---|---|
| Header | DbId: egs DbLabel: Engineering Source An: 194734741 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
| IllustrationInfo | |
| Items | – Name: Title Label: Title Group: Ti Data: Heat flow and crustal thermal structure in the Late Archaean Closepet Granite batholith, south India. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Roy%2C+Sukanta%22">Roy, Sukanta</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> sukantaroy@yahoo.com</i><br /><searchLink fieldCode="AR" term="%22Ray%2C+Labani%22">Ray, Labani</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> labani_ngri@rediffmail.com</i><br /><searchLink fieldCode="AR" term="%22Bhattacharya%2C+Anurup%22">Bhattacharya, Anurup</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> srinivasanmalathi@rediffmail.com</i><br /><searchLink fieldCode="AR" term="%22R%2E%2C+Srinivasan%22">R., Srinivasan</searchLink><relatesTo>1</relatesTo> (AUTHOR) – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22International+Journal+of+Earth+Sciences%22">International Journal of Earth Sciences</searchLink>. Apr2008, Vol. 97 Issue 2, p245-256. 12p. 3 Black and White Photographs, 2 Charts, 1 Graph. – Name: Abstract Label: Abstract Group: Ab Data: The Late Archaean Closepet Granite batholith in south India is exposed at different crustal levels grading from greenschist facies in the north through amphibolite and granulite facies in the south along a ~ 400 km long segment in the Dharwar craton. Two areas, Pavagada and Magadi, located in the Main Mass of the batholith, best represent the granitoid of the greenschist and amphibolite facies crustal levels respectively. Heat flow estimates of 38 mW m–2 from Pavagada and 25 mW m–2 from Magadi have been obtained through measurements in deep (430 and 445 m) and carefully sited boreholes. Measurements made in four boreholes of opportunity in Pavagada area yield a mean heat flow of 39 ± 4 (s.d.) mW m–2, which is in good agreement with the estimate from deep borehole. The study, therefore, demonstrates a clear-cut heat flow variation concomitant with the crustal levels exposed in the two areas. The mean heat production estimates for the greenschist facies and amphibolite facies layers constituting the Main Mass of the batholith are 2.9 and 1.8 lWm–3, respectively. The enhanced heat flow in the Pavagada area is consistent with the occurrence of a radioelement-enriched 2-km-thick greenschist facies layer granitoid overlying the granitoid of the amphibolite facies layer which is twice as thick as represented in the Magadi area. The crustal heat production models indicate similar mantle heat flow estimates in the range 12–14 mW m–2, consistent with the other parts of the greenstone-granite-gneiss terrain of the Dharwar craton. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of International Journal of Earth Sciences 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.) |
| PLink | https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=egs&AN=194734741 |
| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1007/s00531-007-0239-2 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 12 StartPage: 245 Titles: – TitleFull: Heat flow and crustal thermal structure in the Late Archaean Closepet Granite batholith, south India. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Roy, Sukanta – PersonEntity: Name: NameFull: Ray, Labani – PersonEntity: Name: NameFull: Bhattacharya, Anurup – PersonEntity: Name: NameFull: R., Srinivasan IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 04 Text: Apr2008 Type: published Y: 2008 Identifiers: – Type: issn-print Value: 14373254 Numbering: – Type: volume Value: 97 – Type: issue Value: 2 Titles: – TitleFull: International Journal of Earth Sciences Type: main |
| ResultId | 1 |
