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:
Northern Region, Uganda

Oldest recorded age at locality: 31.3
Youngest recorded age at locality: 6.7

mindat Locality ID: 290423
mindat URL: http://www.mindat.org/loc-290423.html

Tectonic Settings:

Total number of sublocalities beneath "Northern Region, Uganda": 9
Total number of bottom-level sublocalities: 6

Number of Child Localities: 5
Child Localities:
Adjumani District
Apac District
Arua District
Kotido District (Karamoja District)
Moroto District

Latitude: 2°33'3"N
Longitude: 34°1'17"E
Decimal Degree (lat, lon): 2.5508333333333,34.021388888889

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	Feldspar	Kornerupine	Milarite	None	Pyroxene	Quartz	Sapphirine	Spinel	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 B F Fe H K Mg Na O Si Zr

Elements from minerals reported directly at this locality:

Structural Groups for minerals in this locality:
Amphibole Feldspar Kornerupine Milarite None Pyroxene Quartz Sapphirine Spinel Zircon

10 IMA Minerals at location:

Aegirine ()*	Albite ()*	Hercynite ()*	Kornerupine ()*	Magnesio-arfvedsonite ()*
Microcline ()*	Osumilite-(Mg) ()*	Quartz ()*	Sapphirine ()*	Zircon ()*

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	31.3	6.7	2	116876,116878	1022
Albite ()*	Feldspar	Na(AlSi₃O₈)	16	15	1	116876	8803
Hercynite ()*	Spinel	Fe²⁺Al₂O₄			1	116875	407
Kornerupine ()*	Kornerupine	(Mg,Fe²⁺,Al, )₁₀(Si,Al,B)₅O₂₁(OH,F)₂			1	116875	68
Magnesio-arfvedsonite ()*	Amphibole	NaNa₂(Mg₄Fe³⁺)Si₈O₂₂(OH)₂	16	15	1	116876	79
Microcline ()*	Feldspar	K(AlSi₃O₈)	16	15	1	116876	4924
Osumilite-(Mg) ()*	Milarite	KMg₂Al₃(Al₂Si₁₀)O₃₀			1	116875	42
Quartz ()*	Quartz	SiO₂			1	116875	61156
Sapphirine ()*	Sapphirine	Mg₄(Mg₃Al₉)O₄[Si₃Al₉O₃₆]			1	116875	129
Zircon ()*	Zircon	Zr(SiO₄)			1	116875	5251

Locality Notes from all Ages at Locality:

Age ID	Locality Notes
Jen_0000403	carbonatite complex with transitional alkali basalt composition
Jen_0000404	carbonatite complex with transitional alkali basalt composition
Jen_0000405	carbonatite complex
Jen_0000620	MAGMATIC STYLE: 400 m diameter central plug with surrounding dykes. ASSOCIATED SILICATE ROCKS: Pyroxenite, melteigite, ijolite, urtite, turjaite, nepheline syenite and fenite; nephelinite and melanephelinite agglomerates with some tuffs and only 3% of lavas. There are rare melilite-bearing lavas.
Jen_0000621	MAGMATIC STYLE: 400 m diameter central plug with surrounding dykes. ASSOCIATED SILICATE ROCKS: Pyroxenite, melteigite, ijolite, urtite, turjaite, nepheline syenite and fenite; nephelinite and melanephelinite agglomerates with some tuffs and only 3% of lavas. There are rare melilite-bearing lavas.
Jen_0000622	MAGMATIC STYLE: 400 m diameter central plug with surrounding dykes. ASSOCIATED SILICATE ROCKS: Pyroxenite, melteigite, ijolite, urtite, turjaite, nepheline syenite and fenite; nephelinite and melanephelinite agglomerates with some tuffs and only 3% of lavas. There are rare melilite-bearing lavas.

6 Ages assigned to this locality:

Excel ID	Max Age (Ma)	Min Age (Ma)	Age as listed in reference	Dating Method	MinDat Locality ID	Dated Locality (Max Age)	Location as listed in reference	Reference	Reference DOI	Reference ID
Jen_0000405	16	15	15.5±0.5	K-Ar	209283	Toror Complex, Kotido District (Karamoja District), Northern Region, Uganda	Toror Complex	Ernst and Bell (2010)	10.1007/s00710-009-0074-1	MP98_55
Jen_0000403	27.5	6.7	27.5-6.7	K-Ar	209287	Napak Complex, Moroto District, Northern Region, Uganda	Napak Complex	Ernst and Bell (2010)	10.1007/s00710-009-0074-1	MP98_55
Jen_0000404	31.3	23.2	31.3-23.2	K-Ar	209287	Napak Complex, Moroto District, Northern Region, Uganda	Napak Complex	Ernst and Bell (2010)	10.1007/s00710-009-0074-1	MP98_55
Jen_0000620	22.1	22.1	22.1		209287	Napak Complex, Moroto District, Northern Region, Uganda	Napak	Woolley and Kjarsgaard (2008)	10.4095/225115	GSCOF5796
Jen_0000621	27.5	6.7	27.5-6.7	K-Ar	209287	Napak Complex, Moroto District, Northern Region, Uganda	Napak	Woolley and Kjarsgaard (2008)	10.4095/225115	GSCOF5796
Jen_0000622	31.3	23.2	31.3-23.2	K-Ar	209287	Napak Complex, Moroto District, Northern Region, Uganda	Napak	Woolley and Kjarsgaard (2008)	10.4095/225115	GSCOF5796

Sample	Source Locality	Reference URL

All locality data graciously provided by mindat.org

All age data...