Premilinary integrated magnetostratigrafía and biostratigraphic correlation in the Miocene Lorca basin, (Murcia, SE Spain)

[EN] The Lorca basin is one of the Neogene basins OS South Eastern Spain. The infilling Tortonian-Messinian deposits are mainly composed OS marls and reach up to 1,200 m in thickness. A biostratigraphic survey OS these deposits, assisted by the determination OS the magnetic polarity reversal pattern...

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Bibliographic Details
Authors: Dinarès-Turell, J., Sprovieri, R., Caruso, A., Di Stefano, E., Gomis Coll, E., Pueyo Mur, Juan José, Rouchy, J. M., Taberner, Conxita
Format: article
Publication Date:1997
Country:España
Institution:Consejo Superior de Investigaciones Científicas (CSIC)
Repository:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/6745
Online Access:http://hdl.handle.net/10261/6745
Access Level:Open access
Keyword:Magnetostratigraphy
Biostratigraphy
Messinian
Lorca basin
Betic Cordillera
Magnetoestratigrafía
Bioestratigrafía
Messiniense
Cuenca de Lorca
Cordilleras Béticas
Description
Summary:[EN] The Lorca basin is one of the Neogene basins OS South Eastern Spain. The infilling Tortonian-Messinian deposits are mainly composed OS marls and reach up to 1,200 m in thickness. A biostratigraphic survey OS these deposits, assisted by the determination OS the magnetic polarity reversal pattern Sor most OS these deposits (900 m), has enabled the Tortonian-Messinian chronostratigraphy to be precised. The close sampling space for biostratigraphic determination has enabled the accurate location OS Sour main biostratigraphic events than can be correlated with charactenstic events of the Mediterranean biostratigraphic Zones. In addition, the location OS the TortonianNessinian boundary has been accurately placed at some 150 m below the main gypsurn unit outcropping in the basin. The integrated bio-magnetostratigraphic data fiom the studied section allows a tentative interpretation OS the identified magnetozones. Thus, a correlation to the Geomagnetic Polarity Time Scale is presented for more than 900 m of pre-evaporite Miocene stratigraphic succession fiom the Lorca basin. Moreover, about 15" OS anticlockwise rotation has been detected. Its significance is evaluated in the basin geodynamic framework.

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