Searching for Regional Crustal Velocity-Density Relations with the Use of 2-D Gravity Modelling – Central Europe Case.
Saved in:
| Title: | Searching for Regional Crustal Velocity-Density Relations with the Use of 2-D Gravity Modelling – Central Europe Case. |
|---|---|
| Authors: | Krysiński, L.1, Grad, M.1, Wybraniec, S.2 |
| Source: | Pure & Applied Geophysics. Nov2009, Vol. 166 Issue 12, p1913-1936. 24p. 1 Diagram, 3 Charts, 8 Graphs, 2 Maps. |
| Subjects: | Precambrian stratigraphic geology, Seismology, Geophysical prospecting |
| Geographic Terms: | Europe, Poland |
| Abstract: | In this paper we search for a reference relation between seismic P-wave velocity V and density ρ ref for the continental crust. Based on the results of modern seismic experiments, we compiled 2-D seismic models into a network of four, each about 1100–1400 km long, continental-scale seismic transects cutting all main tectonic units in Central Europe. The Moho depth (about 52 km beneath the TESZ in SE Poland, to about 25 km beneath the Pannonian Basin) and the crustal structure of this area are characterised by a large variation. This structural variation provides an interesting basis for gravity studies and especially for analysing the difference of the density structure between two major tectonic provinces of distinctive age difference: Precambrian and Phanerozoic. The 2-D gravity modelling applied for crustal cross-sections representing the regional structure, based on a unified gravity anomaly map of the area, allows for a stable determination of some general features of the regional reference velocity-density relation for the continental crust. In general three major seismo-petrological types of rocks can be distinguished: sediments, crystalline crust and mantle. In compacted sediments the reference velocity-density relation is well described by the Gardner or Nafe-Drake model. Calculated gravity anomalies, using unified velocity-density relation for the whole crystalline crust, well describe observed anomalies, with an average difference of 14 mGal. However, calculated gravity anomalies, using separated velocity-density relations for the crystalline crust of Precambrian and Phanerozoic Europe, describe observed anomalies better than for the entire crust, with an average difference 12 mGal. The most important feature of these relations is the large differentiation of the derivative d ρ ref/d V in the crystalline crust, being about 0.3 g s/m4 for Precambrian, and about 0.1 g s/m4 for the Phanerozoic crystalline crust. The modelling suggests a very small density value in the uppermost mantle ρ = 3.11 g/cm3 below the younger area, while for the older area it is ρ = 3.3 g/cm3. [ABSTRACT FROM AUTHOR] |
| Copyright of Pure & Applied Geophysics 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: 45278570 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
| IllustrationInfo | |
| Items | – Name: Title Label: Title Group: Ti Data: Searching for Regional Crustal Velocity-Density Relations with the Use of 2-D Gravity Modelling – Central Europe Case. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Krysiński%2C+L%2E%22">Krysiński, L.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Grad%2C+M%2E%22">Grad, M.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Wybraniec%2C+S%2E%22">Wybraniec, S.</searchLink><relatesTo>2</relatesTo> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Pure+%26+Applied+Geophysics%22">Pure & Applied Geophysics</searchLink>. Nov2009, Vol. 166 Issue 12, p1913-1936. 24p. 1 Diagram, 3 Charts, 8 Graphs, 2 Maps. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Precambrian+stratigraphic+geology%22">Precambrian stratigraphic geology</searchLink><br /><searchLink fieldCode="DE" term="%22Seismology%22">Seismology</searchLink><br /><searchLink fieldCode="DE" term="%22Geophysical+prospecting%22">Geophysical prospecting</searchLink> – Name: SubjectGeographic Label: Geographic Terms Group: Su Data: <searchLink fieldCode="DE" term="%22Europe%22">Europe</searchLink><br /><searchLink fieldCode="DE" term="%22Poland%22">Poland</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: In this paper we search for a reference relation between seismic P-wave velocity V and density ρ ref for the continental crust. Based on the results of modern seismic experiments, we compiled 2-D seismic models into a network of four, each about 1100–1400 km long, continental-scale seismic transects cutting all main tectonic units in Central Europe. The Moho depth (about 52 km beneath the TESZ in SE Poland, to about 25 km beneath the Pannonian Basin) and the crustal structure of this area are characterised by a large variation. This structural variation provides an interesting basis for gravity studies and especially for analysing the difference of the density structure between two major tectonic provinces of distinctive age difference: Precambrian and Phanerozoic. The 2-D gravity modelling applied for crustal cross-sections representing the regional structure, based on a unified gravity anomaly map of the area, allows for a stable determination of some general features of the regional reference velocity-density relation for the continental crust. In general three major seismo-petrological types of rocks can be distinguished: sediments, crystalline crust and mantle. In compacted sediments the reference velocity-density relation is well described by the Gardner or Nafe-Drake model. Calculated gravity anomalies, using unified velocity-density relation for the whole crystalline crust, well describe observed anomalies, with an average difference of 14 mGal. However, calculated gravity anomalies, using separated velocity-density relations for the crystalline crust of Precambrian and Phanerozoic Europe, describe observed anomalies better than for the entire crust, with an average difference 12 mGal. The most important feature of these relations is the large differentiation of the derivative d ρ ref/d V in the crystalline crust, being about 0.3 g s/m4 for Precambrian, and about 0.1 g s/m4 for the Phanerozoic crystalline crust. The modelling suggests a very small density value in the uppermost mantle ρ = 3.11 g/cm3 below the younger area, while for the older area it is ρ = 3.3 g/cm3. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Pure & Applied Geophysics 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=45278570 |
| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1007/s00024-009-0526-x Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 24 StartPage: 1913 Subjects: – SubjectFull: Precambrian stratigraphic geology Type: general – SubjectFull: Seismology Type: general – SubjectFull: Geophysical prospecting Type: general – SubjectFull: Europe Type: general – SubjectFull: Poland Type: general Titles: – TitleFull: Searching for Regional Crustal Velocity-Density Relations with the Use of 2-D Gravity Modelling – Central Europe Case. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Krysiński, L. – PersonEntity: Name: NameFull: Grad, M. – PersonEntity: Name: NameFull: Wybraniec, S. IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 11 Text: Nov2009 Type: published Y: 2009 Identifiers: – Type: issn-print Value: 00334553 Numbering: – Type: volume Value: 166 – Type: issue Value: 12 Titles: – TitleFull: Pure & Applied Geophysics Type: main |
| ResultId | 1 |
