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Details for article 1 of 9 found articles
| Title: |
40Ar/39Ar constraints on the timing and origin of Miocene leucitite volcanism in southeastern Australia |
| Author: |
Cohen, B. E. Knesel, K. M. Vasconcelos, P. M. Thiede, D. S. Hergt, J. M. |
| Appeared in: |
Australian journal of earth sciences |
| Paging: | Volume 55 (2008) nr. 3 pages 407-418 |
| Year: |
2008-04 |
| Contents: |
Laser incremental-heating 40Ar/39Ar geochronology of seven leucitites from southeastern Australia indicates that leucite-bearing lavas in individual geographic clusters were erupted in one million years or less. The eruption ages range from 17.9 ± 0.3 Ma (2σ) at El Capitan in northern-central New South Wales to 8.9 ± 0.2 Ma (2σ) at Cosgrove in northern Victoria. The 40Ar/39Ar results demonstrate that the southward migration of leucite-bearing lavas was near-contemporaneous with age-progressive central-volcano magmatism in southeastern Australia. As such, the 40Ar/39Ar results are consistent with a hotspot-related origin for the leucitites. However, the question of whether single or multiple hotspots are required to explain these volcanic chains, which are separated by a distance of about 300 km, awaits a more complete geochronological picture of the onset, duration and migration of leucitite and central-volcano magmatism in eastern Australia. |
| Publisher: |
Taylor & Francis |
| Source file: |
Elektronische Wetenschappelijke Tijdschriften |
Details for article 1 of 9 found articles
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