The Hushoot Shiveetiin gol section (Baruunhuurai Terrane, Mongolia): sedimentology and facies from a Late Devonian island arc setting

Munkhjargal A., Konigshof P., Hartenfels S., Jansen U., Nazik A., Carmichael S. K., ...Daha Fazla

PALAEOBIODIVERSITY AND PALAEOENVIRONMENTS, cilt.101, sa.3, ss.663-687, 2021 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 101 Sayı: 3
  • Basım Tarihi: 2021
  • Doi Numarası: 10.1007/s12549-020-00445-0
  • Dergi Adı: PALAEOBIODIVERSITY AND PALAEOENVIRONMENTS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.663-687
  • Anahtar Kelimeler: Central Asian Orogenic Belt (CAOB), Facies, Biostratigraphy, Volcanism, Biodiversity hotspot, Hangenberg Crisis, NW CHINA IMPLICATIONS, LARGE IGNEOUS PROVINCES, OXYGEN LEVELS, CARBONIFEROUS BOUNDARY, PHACOPID TRILOBITES, MASS EXTINCTIONS, VOLCANIC TRIGGER, SOUTHERN MARGIN, JUNGGAR BASIN, WEST JUNGGAR
  • Çukurova Üniversitesi Adresli: Evet

Özet

A Late Devonian to (?)Early Mississippian section at Hushoot Shiveetiin gol in the Baruunhuurai Terrane of the Central Asian Orogenic Belt (CAOB) exposes large parts of cyclic Famennian shallow-water siliciclastic shelf deposits composed of siltstones, sandstones, shales, volcaniclastics, and intercalated autochthonous carbonates. The youngest part of the section, possibly Early Mississippian, is represented by arkosic sandstones with large plant remains. The facies reflects a range from shallow-intertidal to outer ramp settings. In terms of conodont stratigraphy, the Hushoot Shiveetiin gol section ranges from the Palmatolepis minuta minuta Biozone to at least the Palmatolepis rugosa trachytera Biozone. Hiatuses of several conodont biozones occur due to the facies setting (erosion and reworked sediments which are recognized by reworked conodonts) rather than thrusting or folding. The environmental setting was characterized by coeval subaerial volcanism resulting in numerous pyroclastic deposits. The depositional environments and intense volcanic activity at the Hushoot Shiveetiin gol section limited the stratigraphic distribution, abundance, and diversity of many elements of the fauna such as brachiopods. Ostracods were very abundant and diverse through many parts of the section. Although limited in stratigraphic distribution, the crinoid fauna is the most diverse Palaeozoic fauna collected from Mongolia to date and supports the hypothesis that the CAOB was a biodiversity hotspot in the aftermath of the Frasnian-Famennian extinction event.