ALBITITE-TRONDHJEMITE-A-TYPE GRANITE ASSOCIATION IN THE PRAKASAM ALKALINE PROVINCE, ANDHRA-PRADESH

Authors
SARVOTHAMAN H SRINIVASAN KN SURESH G
Citation
H. Sarvothaman et al., ALBITITE-TRONDHJEMITE-A-TYPE GRANITE ASSOCIATION IN THE PRAKASAM ALKALINE PROVINCE, ANDHRA-PRADESH, Journal of the Geological Society of India, 51(4), 1998, pp. 471-474
Citations number
14
Categorie Soggetti
Geosciences, Interdisciplinary
Journal title
Journal of the Geological Society of India → ACNP
ISSN journal
00167622
Volume
51
Issue
4
Year of publication
1998
Pages
471 - 474
Database
ISI
SICI code
0016-7622(1998)51:4<471:AGAITP>2.0.ZU;2-B
Abstract
Two dykes of albitite intruding a trondhjemite-A-type granite suite in the Prakasam alkaline province in Andhra Pradesh contain > 90% modal plagioclase (albite), and accessory quantities of homblende, apatite, sphene, anatase and opaque ores. The normative 100.Ab/(Ab + An) is 96 to 100, indicating pure albitic nature of the plagioclase. A two-stage 'branching' differentiation is suggested for this petrological associ ation.