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.
| 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 |
| Year Published | 2009 |
| Language | English |
| Larger Work Type | Article |
| Larger Work Subtype | Journal Article |
| Larger Work Title | Geology |
| First page | 719 |
| Last page | 722 |
| Google Analytic Metrics | Metrics page |