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:
Umba River (Umba Valley), Tanga Region, Tanzania

mindat Locality ID: 8265
mindat URL: http://www.mindat.org/loc-8265.html

Tectonic Settings:

Total number of sublocalities beneath "Umba River (Umba Valley), Tanga Region, Tanzania": 1
Total number of bottom-level sublocalities: 1

Number of Child Localities: 1
Child Localities:
Gerevi Hills

Latitude: 4°31'41"S
Longitude: 38°43'53"E
Decimal Degree (lat, lon): -4.5280555555556,38.731388888889

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.

Amorphous	Calcite	Clay	Corundum	Feldspar	Garnet	Lepidocrocite	Nickeline	None	Not in a structural group
Pyroxene	Rutile	Scapolite	Smectite-vermiculite	Spinel	Tourmaline	Turquoise	Zircon

Almandine ()*	Anorthite ()*	Böhmite ()*	Calcite ()*	Corundum ()*
Diopside ()*	Elbaite ()*	Enstatite ()*	Graphite ()*	Hematite ()*
Kyanite ()*	Marialite ()*	Opal ()*	Pyrope ()*	Pyrrhotite ()*
Rutile ()*	Spinel ()*	Turquoise ()*	Vermiculite ()*	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 C Ca Cl Cu Fe H Li Mg Na O P S Si Ti Zr

Elements from minerals reported directly at this locality: Al B C Ca Cl Cu Fe H Li Mg Na O P S Si Ti Zr

Structural Groups for minerals in this locality:
Amorphous Calcite Clay Corundum Feldspar Garnet Lepidocrocite Nickeline None Not in a structural group
Pyroxene Rutile Scapolite Smectite-vermiculite Spinel Tourmaline Turquoise Zircon

20 IMA Minerals at location:

Mineral name	Structural Groups	IMA Formula	# of Sublocalities containing mineral	LOCALITY IDs, not mindat ids	# of localities containing mineral
Almandine ()*	Garnet	Fe²⁺₃Al₂(SiO₄)₃	0		2353
Anorthite ()*	Feldspar	Ca(Al₂Si₂O₈)	0		1036
Böhmite ()*	Lepidocrocite	AlO(OH)	0		195
Calcite ()*	Calcite	Ca(CO₃)	0		27770
Corundum ()*	Corundum	Al₂O₃	1	115856	1797
Diopside ()*	Pyroxene	CaMgSi₂O₆	0		4135
Elbaite ()*	Tourmaline	Na(Al_1.5Li_1.5)Al₆(Si₆O₁₈)(BO₃)₃(OH)₃(OH)	0		520
Enstatite ()*	Pyroxene	Mg₂Si₂O₆	0		944
Graphite ()*	None	C	0		2812
Hematite ()*	Corundum	Fe₂O₃	0		14640
Kyanite ()*	Not in a structural group	Al₂OSiO₄	0		1507
Marialite ()*	Scapolite	Na₄Al₃Si₉O₂₄Cl	0		139
Opal ()*	Amorphous	SiO₂·nH₂O	0		2994
Pyrope ()*	Garnet	Mg₃Al₂(SiO₄)₃	0		341
Pyrrhotite ()*	Nickeline	Fe₇S₈	0		9056
Rutile ()*	Rutile	TiO₂	0		5614
Spinel ()*	Spinel	MgAl₂O₄	0		1934
Turquoise ()*	Turquoise	CuAl₆(PO₄)₄(OH)₈·4H₂O	0		484
Vermiculite ()*	Clay Smectite-vermiculite	Mg_0.7(Mg,Fe,Al)₆(Si,Al)₈O₂₀(OH)₄·8H₂O	0		652
Zircon ()*	Zircon	Zr(SiO₄)	0		5251

No ages have been assigned to this locality yet.

Sample	Source Locality	Reference URL
R060567	Umba River (Umba Valley), Tanga Region, Tanzania	https://rruff.info/R060567

All locality data graciously provided by mindat.org

All age data...