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:
Kinyamungu, Rangwa Carbonatite Complex, Homa Bay County, Kenya

Oldest recorded age at locality: 38
Youngest recorded age at locality: 17.5

mindat Locality ID: 25929
mindat URL: http://www.mindat.org/loc-25929.html

Tectonic Settings:

Total number of sublocalities beneath "Kinyamungu, Rangwa Carbonatite Complex, Homa Bay County, Kenya": 0
Total number of bottom-level sublocalities: 0

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.

Apatite	None	Spinel

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: Ca F Fe O P

Elements from minerals reported directly at this locality: Ca F Fe O P

Structural Groups for minerals in this locality:
Apatite None Spinel

2 IMA Minerals at location:

Fluorapatite ()*	Magnetite ()*

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
Fluorapatite ()*	Apatite	Ca₅(PO₄)₃F	38	17.5	0		2740
Magnetite ()*	Spinel	Fe²⁺Fe³⁺₂O₄	38	17.5	0		14899

Locality Notes from all Ages at Locality:

Age ID	Locality Notes
Jen_0000408	carbonatite complex with transitional alkali basalt composition
Jen_0000638	MAGMATIC STYLE: Central exposed complex within partially eroded volcano. ASSOCIATED SILICATE ROCKS: Pyroxenite, ijolite, nepheline syenite, phonolite, melilitolite and fenite; nephelinitic and melilitic lavas, tuffs and agglomerates.
Jen_0000639	MAGMATIC STYLE: Central exposed complex within partially eroded volcano. ASSOCIATED SILICATE ROCKS: Pyroxenite, ijolite, nepheline syenite, phonolite, melilitolite and fenite; nephelinitic and melilitic lavas, tuffs and agglomerates.

3 Ages assigned to this locality:

Excel ID	Max Age (Ma)	Min Age (Ma)	Age as listed in reference	Dating Method	Sample Source	Age from other Locality	MinDat Locality ID	Dated Locality (Max Age)	Location as listed in reference	Reference	Reference DOI	Reference ID
Jen_0000408	38	17.5	38-17.5	K-Ar		Yes	285421	Rangwa Carbonatite Complex, Homa Bay County, Kenya	Rangwa Complex	Ernst and Bell (2010)	10.1007/s00710-009-0074-1	MP98_55
Jen_0000638	28	28	28	K-Ar	pyroxene, biotite	Yes	285421	Rangwa Carbonatite Complex, Homa Bay County, Kenya	Kisingiri and Rangwa	Woolley and Kjarsgaard (2008)	10.4095/225115	GSCOF5796
Jen_0000639	38	17.5	38-17.5	K-Ar	pyroxene, biotite	Yes	285421	Rangwa Carbonatite Complex, Homa Bay County, Kenya	Kisingiri and Rangwa	Woolley and Kjarsgaard (2008)	10.4095/225115	GSCOF5796

Sample	Source Locality	Reference URL

All locality data graciously provided by mindat.org

All age data...