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Title: Changhsingian (Late Permian) conodonts from Son La, northwest Vietnam and their stratigraphic and tectonic implications
Contributor(s): Metcalfe, Ian  (author)
Publication Date: 2012
DOI: 10.1016/j.jseaes.2012.01.002
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Abstract: Late Permian conodonts are for the first time reported from Vietnam. Pa, Sa, Sb, Sc and M elements of the Changhsingian conodont species 'Hindeodus julfensis' (Sweet) are reported from a 40 cm thick limestone in the middle part of the Yenduyet Formation near Son La, NW Vietnam. The occurrence of 'H. julfensis' indicates a Changhsingian age that is consistent with an interpreted early Changhsingian age for a brachiopod fauna slightly higher in the sampled section. The Son La section is located in the Song Da Rift Zone and overlies basaltic volcanics considered equivalent to the Emeishan large igneous province basalts that are plume related. The Permian-Triassic boundary in Vietnam is yet to be precisely located biostratigraphically but proxy chemostratigraphic data indicate its likely position in sections at Nhi Tao and Lung Cam, N. Vietnam and correlation with the Global Stratotype Section and Point at Meishan, South China. The recovered conodonts have a Conodont Colour Alteration Index of 5 and have been heated to c. 600°C but they do not show any evidence of textural alteration due to regional metamorphism such as micro-folding or stretching that would indicate any direct effects of the compressional Indosinian Orogeny.
Publication Type: Journal Article
Source of Publication: Journal of Asian Earth Sciences, v.50, p. 141-149
Publisher: Pergamon
Place of Publication: United Kingdom
ISSN: 1878-5786
Field of Research (FoR) 2008: 040311 Stratigraphy (incl Biostratigraphy and Sequence Stratigraphy)
040313 Tectonics
040308 Palaeontology (incl Palynology)
Field of Research (FoR) 2020: undefined
370506 Palaeontology (incl. palynology)
Socio-Economic Objective (SEO) 2008: 850103 Oil and Gas Exploration
970104 Expanding Knowledge in the Earth Sciences
Peer Reviewed: Yes
HERDC Category Description: C1 Refereed Article in a Scholarly Journal
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