Preliminary magnetostratigraphic results from the late Miocene Maragheh Formation, NW Iran

Marja Johanna Salminen, Mohammad Paknia, Anu Pauliina Kaakinen, Majid Mirzaie Ataabadi, Gholamreza Zaree, Zahra Orak, Hannu Lennart Mikael Fortelius

Tutkimustuotos: ArtikkelijulkaisuArtikkeliTieteellinenvertaisarvioitu

Abstrakti

Maragheh in northwestern of Iran is a world famous Miocene fossil-bearing area. The area has yielded classical late Miocene Turolian age fauna that has been collected and studied sporadically over the last 150 years. However, the precise correlation of these sediments to the Global Time Scale (GTS) has remained ambiguous. To address this, 115 levels along an approximately 27-m-thick interval were collected from the middle Maragheh Formation at Dareh Gorg (Gort Daresi) section. Characteristic remanent magnetization directions obtained by alternating field demagnetization produce a polarity pattern that is supported by thermal demagnetization on a set of sister specimens. Three polarity intervals were recognised, the middle part of the section at around 15-21 m showing reversed polarity, bounded by normal polarities above and below. Based on the palaeontological constraints and recent K-Ar age determinations from the Maragheh Fm, three correlations to the geomagnetic polarity time scale appear likely. According to these correlations, recently discovered hominoid locality is correlated to C3Br.1n, C4n.1n, or to C4n.2n. For a unique correlation, however, additional palaeomagnetic data is required from the upper and lower parts of the section.
Alkuperäiskielienglanti
LehtiPalaeobiodiversity and Palaeoenvironments
Vuosikerta96
Numero3
Sivut433–443
Sivumäärä11
ISSN1867-1594
DOI - pysyväislinkit
TilaJulkaistu - 2016
OKM-julkaisutyyppiA1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä, vertaisarvioitu

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  • 114 Fysiikka
  • 1171 Geotieteet
  • 1181 Ekologia, evoluutiobiologia

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