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:
Karbi Anglong District, Assam, India

Oldest recorded age at locality: 105
Youngest recorded age at locality: 105

mindat Locality ID: 153513
mindat URL: http://www.mindat.org/loc-153513.html

Tectonic Settings:

Total number of sublocalities beneath "Karbi Anglong District, Assam, India": 6
Total number of bottom-level sublocalities: 5

Number of Child Localities: 2
Child Localities:
Chippinala
Samchampi-Samteran Alkaline Igneous Complex

Latitude: 26°11'58"N
Longitude: 93°21'36"E
Decimal Degree (lat, lon): 26.199444444444,93.36

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.

Amphibole	Analcime	Calcite	Cancrinite	Clay	Corundum	Feldspar	Mica	None	Not in a structural group
Perovskite	Pyrite	Pyroxene	Quartz	Spinel	Titanite	Tridymite	Zircon

Aegirine ()*	Aegirine-augite ()*	Albite ()*	Arfvedsonite ()*	Augite ()*
Calcite ()*	Cancrinite ()*	Diopside ()*	Dolomite ()*	Hematite ()*
Ilmenite ()*	Leucite ()*	Magnetite ()*	Microcline ()*	Nepheline ()*
Orthoclase ()*	Perovskite ()*	Phlogopite ()*	Pyrite ()*	Quartz ()*
Sanidine ()*	Sillimanite ()*	Titanite ()*	Tremolite ()*	Zircon ()*

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 Fe H K Mg Na O S Si Ti Zr

Elements from minerals reported directly at this locality:

Structural Groups for minerals in this locality:
Amphibole Analcime Calcite Cancrinite Clay Corundum Feldspar Mica None Not in a structural group
Perovskite Pyrite Pyroxene Quartz Spinel Titanite Tridymite Zircon

25 IMA Minerals at location:

Mineral name	Structural Groups	IMA Formula	Max Age (Ma)	Min Age (Ma)	# of Sublocalities containing mineral	LOCALITY IDs, not mindat ids	# of localities containing mineral
Aegirine ()*	Pyroxene	NaFe³⁺Si₂O₆	105	105	1	66091	1022
Aegirine-augite ()*	Pyroxene	(Ca,Na)(Fe³⁺,Mg,Fe²⁺)Si₂O₆	105	105	1	66091	286
Albite ()*	Feldspar	Na(AlSi₃O₈)	105	105	1	66091	8803
Arfvedsonite ()*	Amphibole	NaNa₂(Fe²⁺₄Fe³⁺)Si₈O₂₂(OH)₂	105	105	1	66091	295
Augite ()*	Pyroxene	(Ca,Mg,Fe)₂Si₂O₆	105	105	1	66091	2060
Calcite ()*	Calcite	Ca(CO₃)	105	105	1	66091	27770
Cancrinite ()*	Cancrinite	(Na,Ca, )₈(Al₆Si₆)O₂₄(CO₃,SO₄)₂·2H₂O	105	105	1	66091	232
Diopside ()*	Pyroxene	CaMgSi₂O₆	105	105	1	66091	4135
Dolomite ()*	None	CaMg(CO₃)₂	105	105	1	66091	9895
Hematite ()*	Corundum	Fe₂O₃			1	66092	14640
Ilmenite ()*	Corundum	Fe²⁺Ti⁴⁺O₃			1	66092	5433
Leucite ()*	Analcime	K(AlSi₂O₆)	105	105	1	66091	233
Magnetite ()*	Spinel	Fe²⁺Fe³⁺₂O₄			3	66091,66092,66095	14899
Microcline ()*	Feldspar	K(AlSi₃O₈)	105	105	1	66091	4924
Nepheline ()*	Tridymite	Na₃K(Al₄Si₄O₁₆)	105	105	1	66091	884
Orthoclase ()*	Feldspar	K(AlSi₃O₈)	105	105	1	66091	2349
Perovskite ()*	Perovskite	CaTiO₃			3	66091,66092,66095	495
Phlogopite ()*	Mica Clay	KMg₃(AlSi₃O₁₀)(OH)₂	105	105	1	66091	2273
Pyrite ()*	Pyrite	FeS₂	105	105	1	66091	39462
Quartz ()*	Quartz	SiO₂	105	105	1	66091	61156
Sanidine ()*	Feldspar	K(AlSi₃O₈)	105	105	1	66091	598
Sillimanite ()*	Not in a structural group	Al₂SiO₅			1	66090	1516
Titanite ()*	Titanite	CaTi(SiO₄)O	105	105	1	66091	4899
Tremolite ()*	Amphibole	Ca₂(Mg_5.0-4.5Fe²⁺_0.0-0.5)Si₈O₂₂(OH)₂	105	105	1	66091	2562
Zircon ()*	Zircon	Zr(SiO₄)	105	105	1	66091	5251

Locality Notes from all Ages at Locality:

Age ID	Locality Notes
Jen_0000717	MAGMATIC STYLE: Dyke-like bodies ranging from 25x5 to 400x25 m and small veins and lenses. ASSOCIATED SILICATE ROCKS: Pyroxenite, melteigite-ijolite, magnetite-perovskite rock, nepheline and quartz syenite, leucite-bearing phonolite and fenite.

1 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	Sample Num	Run Num	Age from other Locality	Dated Mineral	Minerals explicitely stated as having this age	Age applies to these Elements	MinDat Locality ID	Dated Locality (Max Age)	Location as listed in reference	Reference	Reference DOI	Reference ID	Age Notes
	Jen_0000717	105	105	105	fission-track			apatite							234864	Samchampi, Samchampi-Samteran Alkaline Igneous Complex, Karbi Anglong District, Assam, India	Samchampi	Woolley and Kjarsgaard (2008)	10.4095/225115	GSCOF5796

Sample	Source Locality	Reference URL

All locality data graciously provided by mindat.org

All age data...