Bhowmik, S.K. ; Bernhardt, Heinz-J. ; Dasgupta, S. (2010) Grenvillian age high-pressure upper amphibolite-granulite metamorphism in the Aravalli-Delhi Mobile Belt, Northwestern India: New evidence from monazite chemical age and its implication Precambrian Research, 178 (1-4). pp. 168-184. ISSN 0301-9268
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Official URL: http://doi.org/10.1016/j.precamres.2010.02.015
Related URL: http://dx.doi.org/10.1016/j.precamres.2010.02.015
Abstract
In this study, we deduce the age of the collisional orogeny in the Aravalli-Delhi Mobile Belt, using electron microprobe (EMP) dating of monazites of two suites of metapelitic to metapsammitic rocks from the Banded Gneissic Complex of Central Rajasthan. These metasediments of the Sandmata and the Mangalwar Complexes record a high-pressure, upper amphibolite (P ∼ 10.3 ± 0.8 kbar, T ∼ 675 ± 60 °C) to granulite facies (P ∼ 12–14 kbar, T ∼ 815 °C) peak metamorphism (M2P stage) and a post-peak decompression to ∼5 kbar, 575–660 °C (M2R stage), following a clockwise P–T path (M2 event). The metapelites of the Sandmata Complex, however, record an older, medium-pressure, sillimanite-facies granulite metamorphism (M1 event).
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Elsevier B.V. |
| Keywords: | Aravalli-Delhi Mobile Belt; HP Metamorphism; Monazite Chemical Dating; Grenvillian; Rodinia. |
| ID Code: | 116865 |
| Deposited On: | 08 Apr 2021 09:07 |
| Last Modified: | 08 Apr 2021 09:07 |
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