A plate like crystal (2 x 1.5 x 0.2 µm) having prismatic and pyramidal faces is identified under scanning electron microscope attached with EDAX probe as a ferrian hydroxyl topaz with its structural formula Si4 (Si1.172Al2.296¬Fe3+2.133 Mg0.307Ca0.347Na0.335K0.293Ti0.088P0.053 SO3 0.079) 7.104 (F5.517OH5.482)10.998 on the basis of 24(O, OH, F). It is found as interstitial mineral amidst calcite crystals. The bulk composition of carbonatite indicates that the topaz was formed by crystallization from a residual liquid derived from the carbonatite lava during the course of its rapid consolidation.
| Published in | Science Discovery (Volume 3, Issue 6) |
| DOI | 10.11648/j.sd.20150306.12 |
| Page(s) | 50-54 |
| Creative Commons |
This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited. |
| Copyright |
Copyright © The Author(s), 2015. Published by Science Publishing Group |
Carbonatite Lava, Bimodal Volcanism, Ferrian Hydroxyl Topaz, Residual Fluids, Rapid Consolidation
| [1] | R. Ramasamy, Carbonatite bombs, lapillus, pisolites and ashes in semi-unconsolidated conglomenrates of Early Pleistocene, from Thiruvalangadu, Tamil Nadu, India. IJERA, 2014, v. 4, (8), 1. |
| [2] | R. Ramasamy, Carbonatite-tephriate and bimodal carbonatite lava occurrences in Dharangambadi - Karikal coast, Tamil Nadu, India, IJMSET, 2014, v.1 (6) 15-30. |
| [3] | R. Ramasamy, The Evidences of Late Cenozoic volcano-tectonic deformations in the Kudangulam area near Cape Comorin, Tamil Nadu, Tamil Culture, (1996-2000), 2000, v 14-18, 169-179. |
| [4] | W. A. Deer, R. H. Howie, J. Zussman Rock Forming Minerals, Pear son, Prentice Hall, London, 1986. |
| [5] | B. Wunder, D. C. Rubie, C. R. Rosss, O. Medenbach, F. Seifert, and W. Schreyer, Synthesis, stability and properties of Al2SiO4(OH)2: a fully hydrated analogue of topaz. American Mineralogist, 1993, v.78, 285–297. |
| [6] | R. Y. Zhang, J. G. Liou and J. F. Shu Hydroxyl-rich topaz in high-pressure and ultrahigh-pressure kyanite quartzite, with retrograde Woodhouseite, from the Sulu Terrane, Eastern China. American Mineralogist, 2002 v. 87, pp.445–453. |
| [7] | www.researchgate.net/.../262342237_REE_and_HF SE mineralization in peralkaline granites. |
| [8] | Le Bas, M. J. Carbonatite–Nephelinite Volcanism. London: John Wiley, 1977. |
| [9] | Woh-Jer Lee and Wylle, P. J., Petrogenesis of carbonatite magmas from Mantle to crust constrained by the system CaO- (MgO-FeO*) - (Na2O+K2O) – (SiO2+Al2O3+TiO2) –CO2, Journal of Petrology, 1998, 39, 3, pp. 495-517. |
| [10] | Yagi, K. Petrochemical studies on the alkaline rocks of the Morotu District, Sakhalin, GSA Bull, 1953, v. 64, 769-810. |
APA Style
Ramachandran Ramasamy. (2015). Ferrian Hydroxyl Topaz from a Carbonatite Lapillus from Thiuvalangadu, Tamil Nadu, India. Science Discovery, 3(6), 50-54. https://doi.org/10.11648/j.sd.20150306.12
ACS Style
Ramachandran Ramasamy. Ferrian Hydroxyl Topaz from a Carbonatite Lapillus from Thiuvalangadu, Tamil Nadu, India. Sci. Discov. 2015, 3(6), 50-54. doi: 10.11648/j.sd.20150306.12
AMA Style
Ramachandran Ramasamy. Ferrian Hydroxyl Topaz from a Carbonatite Lapillus from Thiuvalangadu, Tamil Nadu, India. Sci Discov. 2015;3(6):50-54. doi: 10.11648/j.sd.20150306.12
Share This Article
Twitter
Linked In
Facebook
Copy
Download@article{10.11648/j.sd.20150306.12,
author = {Ramachandran Ramasamy},
title = {Ferrian Hydroxyl Topaz from a Carbonatite Lapillus from Thiuvalangadu, Tamil Nadu, India},
journal = {Science Discovery},
volume = {3},
number = {6},
pages = {50-54},
doi = {10.11648/j.sd.20150306.12},
url = {https://doi.org/10.11648/j.sd.20150306.12},
eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.sd.20150306.12},
abstract = {A plate like crystal (2 x 1.5 x 0.2 µm) having prismatic and pyramidal faces is identified under scanning electron microscope attached with EDAX probe as a ferrian hydroxyl topaz with its structural formula Si4 (Si1.172Al2.296¬Fe3+2.133 Mg0.307Ca0.347Na0.335K0.293Ti0.088P0.053 SO3 0.079) 7.104 (F5.517OH5.482)10.998 on the basis of 24(O, OH, F). It is found as interstitial mineral amidst calcite crystals. The bulk composition of carbonatite indicates that the topaz was formed by crystallization from a residual liquid derived from the carbonatite lava during the course of its rapid consolidation.},
year = {2015}
}
TY - JOUR T1 - Ferrian Hydroxyl Topaz from a Carbonatite Lapillus from Thiuvalangadu, Tamil Nadu, India AU - Ramachandran Ramasamy Y1 - 2015/10/10 PY - 2015 N1 - https://doi.org/10.11648/j.sd.20150306.12 DO - 10.11648/j.sd.20150306.12 T2 - Science Discovery JF - Science Discovery JO - Science Discovery SP - 50 EP - 54 PB - Science Publishing Group SN - 2331-0650 UR - https://doi.org/10.11648/j.sd.20150306.12 AB - A plate like crystal (2 x 1.5 x 0.2 µm) having prismatic and pyramidal faces is identified under scanning electron microscope attached with EDAX probe as a ferrian hydroxyl topaz with its structural formula Si4 (Si1.172Al2.296¬Fe3+2.133 Mg0.307Ca0.347Na0.335K0.293Ti0.088P0.053 SO3 0.079) 7.104 (F5.517OH5.482)10.998 on the basis of 24(O, OH, F). It is found as interstitial mineral amidst calcite crystals. The bulk composition of carbonatite indicates that the topaz was formed by crystallization from a residual liquid derived from the carbonatite lava during the course of its rapid consolidation. VL - 3 IS - 6 ER -
Email: