Biotite from
Purimetla, Prakasam District, Andhra Pradesh, India

Photos Maps Search Mineralogy

Standard

Add Photo

Map Pages Nearest Localities

Mineral Search Similar Localities Nearest Localities Search Google

Predictive Mineralogy

Classification
Locality type:	Intrusion
Species:	'Biotite' (not an IMA approved species)
Formula:	K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂
Confirmation
Validity:	Believed Valid
Data
Mineral Data:	Click here to view Biotite data
Locality Data:	Click here to view Purimetla, Prakasam District, Andhra Pradesh, India
Data Identifiers
Mindat Occurrence Record ID:	760600
Long-form Identifier:	1:3:760600:7
GUID (UUID V4):	0
Nearest other occurrences of Biotite

10.7km (6.6 miles)	ⓘ Pasupugallu pluton, Prakasam District, Andhra Pradesh, India
13.1km (8.1 miles)	ⓘ Settupalle pluton, Prakasam District, Andhra Pradesh, India
15.7km (9.8 miles)	ⓘ Elchuru Complex, Prakasam District, Andhra Pradesh, India
18.0km (11.2 miles)	ⓘ Vinukonda, Palnadu District, Andhra Pradesh, India
21.8km (13.6 miles)	ⓘ Kotappa Konda outcrops, Prakasam District, Andhra Pradesh, India
28.0km (17.4 miles)	ⓘ Chimakurti Pluton, Prakasam District, Andhra Pradesh, India
30.1km (18.7 miles)	ⓘ Uppalapadu Pluton, Prakasam District, Andhra Pradesh, India
38.8km (24.1 miles)	ⓘ Podili, Prakasam District, Andhra Pradesh, India
59.4km (36.9 miles)	ⓘ Gundlapalle, Palnadu District, Andhra Pradesh, India
References
Gabbro intruded the granite-gneiss and amphibolite country rock, and was in turn intruded by an alkaline plutonic rock, exposed in Purimetla and a belt stretching about 4km to the NE and 4km to the SW. Leelanandam, C., & Ratnakar, J. (1980). Ocellar lamprophyres from the Purimetla alkaline pluton, Prakasam district, Andhra Pradesh. QJ Geol. Ming. Metall. Soc. India, 52(2), 77-79. Madhavan, V., & Leelanandam, C. (1981). The aenigmatite-bearing alkaline rocks from the Prakasam and Nellore districts of Andhra Pradesh. Current Science, 50(7), 320-321. Leelanandam, C., & Ratnakar, J. (1983). The Purimetla alkaline pluton. Prakasam District, Andhra Pradesh. Quart. Jour. Geol. Min. Met. Soc. India (presently Indian Jour. Geol.), 55, 14-30. Ratnakar, J., & Leelanandam, C. (1986). A PETROCHEMICAL STUDY OF THE PURIMETLA ALKALINE PLUTON, PRAKASAM DISTRICT, ANDHRA-PRADESH, INDIA. NEUES JAHRBUCH FUR MINERALOGIE-ABHANDLUNGEN, 156(1), 99-119. *Leelanandam, C. (1989) The Prakasam Alkaline Province in Andbra Pradesh, India. Journal Geological Society of India, 34 (1). 25-45 doi:10.17491/jgsi/1989/340102*

Mindat.org® is an outreach project of the Hudson Institute of Mineralogy, a 501(c)(3) not-for-profit organization. Mindat® and mindat.org® are registered trademarks of the Hudson Institute of Mineralogy.
Copyright © mindat.org and the Hudson Institute of Mineralogy 1993-2026, except where stated. Most political location boundaries are © OpenStreetMap contributors. Mindat.org relies on the contributions of thousands of members and supporters. Founded in 2000 by Jolyon Ralph and Ida Chau.
Content on this site may not be used to train, fine-tune, or otherwise develop artificial intelligence or machine learning models without prior written permission - see our Terms & Conditions.
To cite: Ralph, J., Von Bargen, D., Martynov, P., Zhang, J., Que, X., Prabhu, A., Morrison, S. M., Li, W., Chen, W., & Ma, X. (2025). Mindat.org: The open access mineralogy database to accelerate data-intensive geoscience research. American Mineralogist, 110(6), 833–844. doi:10.2138/am-2024-9486.
Privacy Policy - Terms & Conditions - Contact Us / DMCA issues - Report a bug/vulnerability Current server date and time: October 19, 2026 21:53:02

Go to top of page

Biotite from Purimetla, Prakasam District, Andhra Pradesh, India

Biotite from
Purimetla, Prakasam District, Andhra Pradesh, India