Verma, H. C. ; Upadhyay, C. ; Tripathi, R. P. ; Shukla, A. D. ; Bhandari, N. (2002) Evidence of impact at Permian/Triassic boundary from Mossbauer spectroscopy hyperfine interactions Hyperfine Interactions, 141-142 (1-4). pp. 357-360. ISSN 0304-3843
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Official URL: http://www.springerlink.com/content/q6423782524l84...
Related URL: http://dx.doi.org/10.1023/A:1021232220892
Abstract
Sediment samples from Spiti valley, India, deposited about 250 Million years ago during the Permian-Triassic transition, have been analysed. 57Fe Mossbauer spectroscopic studies show that iron occurs mainly as nanoparticles of hematite and goethite with a broad size distribution. The results show a high degree of resemblance with the Cretaceous-Tertiary boundary (65 My) samples where an asteroidal impact is believed to have caused mass extinction.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Springer-Verlag. |
| ID Code: | 18554 |
| Deposited On: | 17 Nov 2010 09:26 |
| Last Modified: | 17 May 2011 08:07 |
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