Mineral Evolution Database

Created and maintained by the Mineral Evolution Project in partnership with RRUFF and mindat.

Mineral locality data provided by mindat.org

The Mineral Evolution database is currently under development.

The goal of this page is to present localities at which the mineral is found, and estimates of the oldest possible geologic age of the minerals at these localities.

Locality Name:
Nellore District, Andhra Pradesh, India

Oldest recorded age at locality: 647
Youngest recorded age at locality: 0

mindat Locality ID: 218823
mindat URL: http://www.mindat.org/loc-218823.html

Tectonic Settings:

Total number of sublocalities beneath "Nellore District, Andhra Pradesh, India": 1
Total number of bottom-level sublocalities: 1

Number of Child Localities: 1
Child Localities:
Kodanda Rama Mine

Latitude: 0°0'0"N
Longitude: 0°0'0"E
Decimal Degree (lat, lon): 0,0

A	This mineral is Anthropogenic.
G	This mineral is directly dated.
B	This mineral is reported as having this age.
Y	This mineral is using an age reported as an element mineralization period.
O	This mineral is using an age calculated from all data at the locality.
R	The age displayed for this mineral originates from a different, non-child locality.
P	The age displayed for this mineral is the range of ages for this mineral at all of this locality's children.
	This mineral's age has not yet been recorded.

Allanite	Bastnäsite	Columbite	Epidote	None	Oxalate	Quartz

This Mineral list contains entries from this locality, including sub-localities. Minerals in bold are reported by mindat.org as occurring directly at this locality, and do not occur at any children (sublocalities) of this locality.

Elements at this locality, including sub-localities: Al C Ca Ce F Fe H Nb O Si Y

Elements from minerals reported directly at this locality:

Structural Groups for minerals in this locality:
Allanite Bastnäsite Columbite Epidote None Oxalate Quartz

5 IMA Minerals at location:

Allanite-(Ce) ()*	Bastnäsite-(Ce) ()*	Deveroite-(Ce) ()*	Quartz ()*	Samarskite-(Y) ()*

Mineral name	Structural Groups	IMA Formula	# of Sublocalities containing mineral	LOCALITY IDs, not mindat ids	# of localities containing mineral
Allanite-(Ce) ()*	Allanite Epidote	CaCe(Al₂Fe²⁺)[Si₂O₇][SiO₄]O(OH)	1	66040	706
Bastnäsite-(Ce) ()*	Bastnäsite	Ce(CO₃)F	1	66040	304
Deveroite-(Ce) ()*	Oxalate	Ce₂(C₂O₄)₃·10H₂O	1	66040	2
Quartz ()*	Quartz	SiO₂	1	66040	61156
Samarskite-(Y) ()*	Columbite	YFe³⁺Nb₂O₈	1	66040	353

Locality Notes from all Ages at Locality:

Age ID	Locality Notes
Michelle_816	Found on weathered pegmatite of the Kodanda Rama Mine in the Nellore District. "Deveroite-(Ce) forms a white coating, sourrounding Allanite / Bastnäsite in Feldspar. I think the material was collect during prospecting works in the 1970. The orgin of Cerium is clear in this case, but the Oxalate is difficult, probably the roots of some trees."
Michelle_817	Minerals were collected from the mica mines, in Gudur Taluq, of the Nellore district in Andhra Pradesh. Pegmatitic veins in the area are emplaced in the country rock, consisting mainly of biotite-hornblende schists, minor quartizites and felspathic schists.
Michelle_818	Minerals were collected from the mica mines, in Gudur Taluq, of the Nellore district in Andhra Pradesh. Pegmatitic veins in the area are emplaced in the country rock, consisting mainly of biotite-hornblende schists, minor quartizites and felspathic schists.
Michelle_819	Minerals were collected from the mica mines, in Gudur Taluq, of the Nellore district in Andhra Pradesh. Pegmatitic veins in the area are emplaced in the country rock, consisting mainly of biotite-hornblende schists, minor quartizites and felspathic schists.

4 Ages assigned to this locality:

Excel ID	Max Age (Ma)	Min Age (Ma)	Age as listed in reference	Dating Method	Age Interpret	Prioritized?	Sample Source	Dated Mineral	MinDat Locality ID	Dated Locality (Max Age)	Location as listed in reference	Reference	Reference DOI	Reference ID	Age Notes
Michelle_817	456	436	446±10	Fission Track	Age when the thermal conditions in the region became stable		apatite		218823	Nellore District, Andhra Pradesh, India	Nellore Mica Belt	Nagpaul (1974)	10.1007/BF00875928	PAG112_140	Age when the thermal conditions in the region became stable
Michelle_818	647	617	632±15	Fission Track	Age of major metamorphic event		muscovite	Muscovite	218823	Nellore District, Andhra Pradesh, India	Nellore Mica Belt	Nagpaul (1974)	10.1007/BF00875928	PAG112_140	Age of major metamorphic event
Michelle_819	504	470	487±17	Fission Track			biotite		218823	Nellore District, Andhra Pradesh, India	Nellore Mica Belt	Nagpaul (1974)	10.1007/BF00875928	PAG112_140	The muscovite age can be reconciled with the biotite age (487±17 m.y.) when its track length distribution curve is interpreted on a two-stage thermal annealing model and the necessary corrections are applied for the decrease of fossil track density.
Michelle_816	0	0	Recent		Age of oxalate mineralization	high			234850	Kodanda Rama Mine, Nellore District, Andhra Pradesh, India	Kodanda Rama mine	Färber (2018)			Age of oxalate mineralization

Sample	Source Locality	Reference URL

All locality data graciously provided by mindat.org

All age data...