New palaeomagnetic data from the Betic Cordillera: Constraints on the timing and the geographical distribution of tectonic rotations in southern Spain
--A palaeomagnetic investigation has been carried out at 14 sites on Jurassic red nodular limestones from the central and eastern part of the External Zones of the Betic Cordillera (Subbetic and Prebetic Zones). Progressive thermal demagnetisation of samples from the Subbetic Zone reveals the presen...
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| Veröffentlicht in: | Pure and Applied Geophysics 2004-03, Vol.161 (3), p.701-722 |
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| container_title | Pure and Applied Geophysics |
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| creator | OSETE, M. L VILLALAIN, J. J PALENCIA, A OSETE, C SANDOVAL, J GARCIA DUENAS, V |
| description | --A palaeomagnetic investigation has been carried out at 14 sites on Jurassic red nodular limestones from the central and eastern part of the External Zones of the Betic Cordillera (Subbetic and Prebetic Zones). Progressive thermal demagnetisation of samples from the Subbetic Zone reveals the presence of two stable magnetic components of the natural remanent magnetisation: 1) a secondary Neogene syn-folding component and 2) the original Jurassic magnetisation. As similar characteristics have been reported in Jurassic limestones from the western Subbetic Zone, a widespread remagnetisation event took place within |
| doi_str_mv | 10.1007/s00024-003-2470-5 |
| format | Article |
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L ; VILLALAIN, J. J ; PALENCIA, A ; OSETE, C ; SANDOVAL, J ; GARCIA DUENAS, V</creator><creatorcontrib>OSETE, M. L ; VILLALAIN, J. J ; PALENCIA, A ; OSETE, C ; SANDOVAL, J ; GARCIA DUENAS, V</creatorcontrib><description>--A palaeomagnetic investigation has been carried out at 14 sites on Jurassic red nodular limestones from the central and eastern part of the External Zones of the Betic Cordillera (Subbetic and Prebetic Zones). Progressive thermal demagnetisation of samples from the Subbetic Zone reveals the presence of two stable magnetic components of the natural remanent magnetisation: 1) a secondary Neogene syn-folding component and 2) the original Jurassic magnetisation. As similar characteristics have been reported in Jurassic limestones from the western Subbetic Zone, a widespread remagnetisation event took place within <10^sup 6^ years in the entire Subbetic region during Neogene times. In contrast, in the Prebetic region, no evidence for a secondary overprint has been detected. Palaeomagnetic Jurassic declinations indicate variable and locally very large clockwise rotations (35°-140°), but the two sites in the north-westernmost part of the investigated region are not rotated. The use of both components of magnetisation and the incremental fold-test results allowed the timing of block rotations in the Subbetic Zone to be constrained. Rotations in the western Subbetic occurred after the acquisition of the secondary overprint, whereas in the central part of the Subbetic Zone they were completed by the time of the remagnetisation event.[PUBLICATION ABSTRACT]</description><identifier>ISSN: 0033-4553</identifier><identifier>EISSN: 1420-9136</identifier><identifier>DOI: 10.1007/s00024-003-2470-5</identifier><identifier>CODEN: PAGYAV</identifier><language>eng</language><publisher>Basel: Springer</publisher><subject>Blocking ; Constraints ; Declination ; Earth sciences ; Earth, ocean, space ; Exact sciences and technology ; Geodetics ; Geographical distribution ; Geophysics ; Geophysics: general, magnetic, electric and thermic methods and properties ; Internal geophysics ; Jurassic ; Limestone ; Magnetism ; Marketing ; Neogene ; Paleomagnetism ; Plate tectonics ; Seismology ; Tectonics ; Tectonics. Structural geology. Plate tectonics ; Time measurements</subject><ispartof>Pure and Applied Geophysics, 2004-03, Vol.161 (3), p.701-722</ispartof><rights>2004 INIST-CNRS</rights><rights>Birkhäuser Verlag, Basel, 2004</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-a355t-f64a76841766ded2d8a0f37e55096f84f146b811bd3c3f78f6e8e0437e4437863</citedby></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>309,310,314,776,780,785,786,23911,23912,25120,27903,27904</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=15488101$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>OSETE, M. L</creatorcontrib><creatorcontrib>VILLALAIN, J. J</creatorcontrib><creatorcontrib>PALENCIA, A</creatorcontrib><creatorcontrib>OSETE, C</creatorcontrib><creatorcontrib>SANDOVAL, J</creatorcontrib><creatorcontrib>GARCIA DUENAS, V</creatorcontrib><title>New palaeomagnetic data from the Betic Cordillera: Constraints on the timing and the geographical distribution of tectonic rotations in southern Spain</title><title>Pure and Applied Geophysics</title><description>--A palaeomagnetic investigation has been carried out at 14 sites on Jurassic red nodular limestones from the central and eastern part of the External Zones of the Betic Cordillera (Subbetic and Prebetic Zones). Progressive thermal demagnetisation of samples from the Subbetic Zone reveals the presence of two stable magnetic components of the natural remanent magnetisation: 1) a secondary Neogene syn-folding component and 2) the original Jurassic magnetisation. As similar characteristics have been reported in Jurassic limestones from the western Subbetic Zone, a widespread remagnetisation event took place within <10^sup 6^ years in the entire Subbetic region during Neogene times. In contrast, in the Prebetic region, no evidence for a secondary overprint has been detected. Palaeomagnetic Jurassic declinations indicate variable and locally very large clockwise rotations (35°-140°), but the two sites in the north-westernmost part of the investigated region are not rotated. The use of both components of magnetisation and the incremental fold-test results allowed the timing of block rotations in the Subbetic Zone to be constrained. Rotations in the western Subbetic occurred after the acquisition of the secondary overprint, whereas in the central part of the Subbetic Zone they were completed by the time of the remagnetisation event.[PUBLICATION ABSTRACT]</description><subject>Blocking</subject><subject>Constraints</subject><subject>Declination</subject><subject>Earth sciences</subject><subject>Earth, ocean, space</subject><subject>Exact sciences and technology</subject><subject>Geodetics</subject><subject>Geographical distribution</subject><subject>Geophysics</subject><subject>Geophysics: general, magnetic, electric and thermic methods and properties</subject><subject>Internal geophysics</subject><subject>Jurassic</subject><subject>Limestone</subject><subject>Magnetism</subject><subject>Marketing</subject><subject>Neogene</subject><subject>Paleomagnetism</subject><subject>Plate tectonics</subject><subject>Seismology</subject><subject>Tectonics</subject><subject>Tectonics. Structural geology. 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L</au><au>VILLALAIN, J. J</au><au>PALENCIA, A</au><au>OSETE, C</au><au>SANDOVAL, J</au><au>GARCIA DUENAS, V</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>New palaeomagnetic data from the Betic Cordillera: Constraints on the timing and the geographical distribution of tectonic rotations in southern Spain</atitle><jtitle>Pure and Applied Geophysics</jtitle><date>2004-03-01</date><risdate>2004</risdate><volume>161</volume><issue>3</issue><spage>701</spage><epage>722</epage><pages>701-722</pages><issn>0033-4553</issn><eissn>1420-9136</eissn><coden>PAGYAV</coden><abstract>--A palaeomagnetic investigation has been carried out at 14 sites on Jurassic red nodular limestones from the central and eastern part of the External Zones of the Betic Cordillera (Subbetic and Prebetic Zones). Progressive thermal demagnetisation of samples from the Subbetic Zone reveals the presence of two stable magnetic components of the natural remanent magnetisation: 1) a secondary Neogene syn-folding component and 2) the original Jurassic magnetisation. As similar characteristics have been reported in Jurassic limestones from the western Subbetic Zone, a widespread remagnetisation event took place within <10^sup 6^ years in the entire Subbetic region during Neogene times. In contrast, in the Prebetic region, no evidence for a secondary overprint has been detected. Palaeomagnetic Jurassic declinations indicate variable and locally very large clockwise rotations (35°-140°), but the two sites in the north-westernmost part of the investigated region are not rotated. The use of both components of magnetisation and the incremental fold-test results allowed the timing of block rotations in the Subbetic Zone to be constrained. Rotations in the western Subbetic occurred after the acquisition of the secondary overprint, whereas in the central part of the Subbetic Zone they were completed by the time of the remagnetisation event.[PUBLICATION ABSTRACT]</abstract><cop>Basel</cop><pub>Springer</pub><doi>10.1007/s00024-003-2470-5</doi><tpages>22</tpages></addata></record> |
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| ispartof | Pure and Applied Geophysics, 2004-03, Vol.161 (3), p.701-722 |
| issn | 0033-4553 1420-9136 |
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| subjects | Blocking Constraints Declination Earth sciences Earth, ocean, space Exact sciences and technology Geodetics Geographical distribution Geophysics Geophysics: general, magnetic, electric and thermic methods and properties Internal geophysics Jurassic Limestone Magnetism Marketing Neogene Paleomagnetism Plate tectonics Seismology Tectonics Tectonics. Structural geology. Plate tectonics Time measurements |
| title | New palaeomagnetic data from the Betic Cordillera: Constraints on the timing and the geographical distribution of tectonic rotations in southern Spain |
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