U-Pb zircon ages from the southwestern Karoo Basin, South Africa - Implications for the Permian-Triassic boundary
Geology
By: A. Fildani, A. Weislogel, N.J. Drinkwater, T. McHargue, A. Tankard, J. Wooden, D. Hodgson, and S. Flint
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Abstract
U-Pb ages determined using sensitive high-resolution ion microprobe-reverse geometry on 205 single-grain zircons from 16 ash beds within submarine fan deposits of the Ecca Group provide the first evidence of a marine Permian-Triassic (P-T) boundary in the Karoo Basin of South Africa. These U-Pb ages provide an objective basis for correlating the deep-marine sediments of the southwest Karoo Basin with fluvial-deltaic deposits in the central and eastern parts of the basin where the P-T boundary is recorded in a diverse macrofauna. Furthermore, these new zircon ages and their correlation imply asymmetric subsidence and variable sedimentation rates across the basin. ?? 2009 Geological Society of America.
Suggested Citation
Fildani, A., Weislogel, A., Drinkwater, N., McHargue, T., Tankard, A., Wooden, J., Hodgson, D., Flint, S., 2009, U-Pb zircon ages from the southwestern Karoo Basin, South Africa - Implications for the Permian-Triassic boundary: Geology, v. 37, no. 8, p. 719-722, https://doi.org/10.1130/G25685A.1.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | U-Pb zircon ages from the southwestern Karoo Basin, South Africa - Implications for the Permian-Triassic boundary |
| Series title | Geology |
| DOI | 10.1130/G25685A.1 |
| Volume | 37 |
| Issue | 8 |
| Publication Date | July 30, 2009 |
| Year Published | 2009 |
| Language | English |
| Larger Work Type | Article |
| Larger Work Subtype | Journal Article |
| Larger Work Title | Geology |
| First page | 719 |
| Last page | 722 |