Ordovician stratigraphy of the Junee–Narromine Volcanic Belt in central New South Wales, Australia: conodont studies and regional correlations
| Autor: | Yong Yi Zhen, Ian G. Percival |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2023 |
| Předmět: | |
| Zdroj: | Estonian Journal of Earth Sciences, Vol 72, Iss 1, Pp 114-117 (2023) |
| Druh dokumentu: | article |
| ISSN: | 1736-4728 1736-7557 |
| DOI: | 10.3176/earth.2023.11 |
| Popis: | This contribution reviews the newly revised biostratigraphy of MiddleâUpper Ordovician marine shelf successions from the JuneeâNarromine Volcanic Belt in central New South Wales, based on conodont studies from four areas covering the northern, central and southern sectors of the Belt. Seven conodont biozones ranging from the middle Darriwilian (Histiodella holodentata-Eoplacognathus pseudoplanus Biozone) to the lower Katian (Taoqupognathus blandus Biozone) are recognized in the Billabong Creek Formation exposed in the Gunningbland area. This includes the first known biostratigraphic succession in Australia that extends continuously from the middle Darriwilian to the basal Sandbian. These new data are crucial for a better understanding of the geological evolution of this region in central New South Wales, and for the enhanced correlation of Ordovician rocks throughout the Macquarie Volcanic Province, which hosts substantial porphyry CuâAu mineral deposits. |
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