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:
East Khasi Hills, Meghalaya, India

Oldest recorded age at locality: 154
Youngest recorded age at locality: 95

mindat Locality ID: 286751
mindat URL: http://www.mindat.org/loc-286751.html

Tectonic Settings:

Total number of sublocalities beneath "East Khasi Hills, Meghalaya, India": 1
Total number of bottom-level sublocalities: 1

Number of Child Localities: 1
Child Localities:
Sung Valley Complex

Latitude: 25°34'9"N
Longitude: 92°7'1"E
Decimal Degree (lat, lon): 25.569166666667,92.116944444444

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.

Calcite	Clay	Mica	None	Perovskite	Spinel	Titanite

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 O Si Ti

Elements from minerals reported directly at this locality:

Structural Groups for minerals in this locality:
Calcite Clay Mica None Perovskite Spinel Titanite

6 IMA Minerals at location:

Calcite ()*	Dolomite ()*	Magnetite ()*	Perovskite ()*	Phlogopite ()*
Titanite ()*

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
Calcite ()*	Calcite	Ca(CO₃)	154	95	1	66619	27770
Dolomite ()*	None	CaMg(CO₃)₂	154	95	1	66619	9895
Magnetite ()*	Spinel	Fe²⁺Fe³⁺₂O₄	154	95	1	66619	14899
Perovskite ()*	Perovskite	CaTiO₃	154	95	1	66619	495
Phlogopite ()*	Mica Clay	KMg₃(AlSi₃O₁₀)(OH)₂	154	106.2	1	66619	2273
Titanite ()*	Titanite	CaTi(SiO₄)O	154	95	1	66619	4899

Locality Notes from all Ages at Locality:

Age ID	Locality Notes
Jen_0000722	MAGMATIC STYLE: Dykes and sheet-like bodies. ASSOCIATED SILICATE ROCKS: Peridotite, pyroxenite, ijolite, melilitolite, nepheline syenite, syenite, magnetite rock and magnetite-apatite rock; fenites.
Jen_0000723	MAGMATIC STYLE: Dykes and sheet-like bodies. ASSOCIATED SILICATE ROCKS: Peridotite, pyroxenite, ijolite, melilitolite, nepheline syenite, syenite, magnetite rock and magnetite-apatite rock; fenites.
Jen_0000724	MAGMATIC STYLE: Dykes and sheet-like bodies. ASSOCIATED SILICATE ROCKS: Peridotite, pyroxenite, ijolite, melilitolite, nepheline syenite, syenite, magnetite rock and magnetite-apatite rock; fenites.
Jen_0000725	MAGMATIC STYLE: Dykes and sheet-like bodies. ASSOCIATED SILICATE ROCKS: Peridotite, pyroxenite, ijolite, melilitolite, nepheline syenite, syenite, magnetite rock and magnetite-apatite rock; fenites.

4 Ages assigned to this locality:

Excel ID	Max Age (Ma)	Min Age (Ma)	Age as listed in reference	Dating Method	Sample Source	Dated Mineral	MinDat Locality ID	Dated Locality (Max Age)	Location as listed in reference	Reference	Reference DOI	Reference ID
Jen_0000722	107.8	106.2	107.2±0.8	Ar-Ar	phlogopite	Phlogopite	227752	Sung Valley Complex, East Khasi Hills, Meghalaya, India	Sung Valley	Woolley and Kjarsgaard (2008)	10.4095/225115	GSCOF5796
Jen_0000723	154	144	149±5	K-Ar	phlogopite	Phlogopite	227752	Sung Valley Complex, East Khasi Hills, Meghalaya, India	Sung Valley	Woolley and Kjarsgaard (2008)	10.4095/225115	GSCOF5796
Jen_0000724	154	114	134±20	Pb-Pb	whole rock		227752	Sung Valley Complex, East Khasi Hills, Meghalaya, India	Sung Valley	Woolley and Kjarsgaard (2008)	10.4095/225115	GSCOF5796
Jen_0000725	117	95	106±11	Rb-Sr			227752	Sung Valley Complex, East Khasi Hills, Meghalaya, India	Sung Valley	Woolley and Kjarsgaard (2008)	10.4095/225115	GSCOF5796

Sample	Source Locality	Reference URL

All locality data graciously provided by mindat.org

All age data...