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:
Sadiman Volcano, Arusha Region, Tanzania

Oldest recorded age at locality: 4.9
Youngest recorded age at locality: 3.26

mindat Locality ID: 240642
mindat URL: http://www.mindat.org/loc-240642.html

Tectonic Settings:

Total number of sublocalities beneath "Sadiman Volcano, Arusha Region, Tanzania": 0
Total number of bottom-level sublocalities: 0

Latitude: 3°11'"S
Longitude: 35°21'0"E
Decimal Degree (lat, lon): -3.1833333333333,35.35

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.

Cancrinite-sodalite	Chalcopyrite	Corundum	Feldspar	Fluorite	Nickeline	None	Perovskite	Pyroxene	Rocksalt
Sapphirine	Sodalite	Spinel	Titanite	Tridymite	Wollastonite	Wöhlerite

Aenigmatite ()*	Barytolamprophyllite ()*	Chalcopyrite ()*	Cuspidine ()*	Diopside ()*
Fluorite ()*	Galena ()*	Götzenite ()*	Ilmenite ()*	Magnetite ()*
Nepheline ()*	Perovskite ()*	Pyrrhotite ()*	Sanidine ()*	Sodalite ()*
Titanite ()*	Wollastonite ()*

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 Ba Ca Cl Cu F Fe H K Mg Na O Pb S Si Ti

Elements from minerals reported directly at this locality: Al Ba Ca Cl Cu F Fe H K Mg Na O Pb S Si Ti

Structural Groups for minerals in this locality:
Cancrinite-sodalite Chalcopyrite Corundum Feldspar Fluorite Nickeline None Perovskite Pyroxene Rocksalt
Sapphirine Sodalite Spinel Titanite Tridymite Wollastonite Wöhlerite

17 IMA Minerals at location:

Mineral name	Structural Groups	IMA Formula	Max Age (Ma)	Min Age (Ma)	# of localities containing mineral
Aenigmatite ()*	Sapphirine	Na₄[Fe²⁺₁₀Ti₂]O₄[Si₁₂O₃₆]	4.9	3.26	133
Barytolamprophyllite ()*	None	(BaK)Ti₂Na₃Ti(Si₂O₇)₂O₂(OH)₂	4.9	3.26	21
Chalcopyrite ()*	Chalcopyrite	CuFeS₂	4.9	3.26	27198
Cuspidine ()*	Wöhlerite	Ca₈(Si₂O₇)₂F₄	4.9	3.26	67
Diopside ()*	Pyroxene	CaMgSi₂O₆	4.9	3.26	4135
Fluorite ()*	Fluorite	CaF₂	4.9	3.26	9617
Galena ()*	Rocksalt	PbS	4.9	3.26	24243
Götzenite ()*	None	Ca₄NaCa₂Ti(Si₂O₇)₂(OF)F₂	4.9	3.26	27
Ilmenite ()*	Corundum	Fe²⁺Ti⁴⁺O₃	4.9	3.26	5433
Magnetite ()*	Spinel	Fe²⁺Fe³⁺₂O₄	4.9	3.26	14899
Nepheline ()*	Tridymite	Na₃K(Al₄Si₄O₁₆)	4.9	3.26	884
Perovskite ()*	Perovskite	CaTiO₃	4.9	3.26	495
Pyrrhotite ()*	Nickeline	Fe₇S₈	4.9	3.26	9056
Sanidine ()*	Feldspar	K(AlSi₃O₈)	4.9	3.26	598
Sodalite ()*	Cancrinite-sodalite Sodalite	Na₄(Si₃Al₃)O₁₂Cl	4.9	3.26	444
Titanite ()*	Titanite	CaTi(SiO₄)O	4.9	3.26	4899
Wollastonite ()*	Wollastonite	CaSiO₃	4.9	3.26	1247

Locality Notes from all Ages at Locality:

Age ID	Locality Notes
Jen_0000432	carbonatite complex
Jen_0000433	carbonatite complex
Jen_0000576	MAGMATIC STYLE: Tuffs on the Eyasi Plateau probably emanated from Sadiman and include the Laetoli Beds which contain approximately 25 carbonatite and 35 melilitite-carbonatite air-fall layers. ASSOCIATED SILICATE ROCKS: Nephelinitic tuffs and agglomerates with subsidiary lavas of nephelinite, melilite nephelinite, phonolitic trachyte and sodalite phonolite.
Jen_0000577	MAGMATIC STYLE: Tuffs on the Eyasi Plateau probably emanated from Sadiman and include the Laetoli Beds which contain approximately 25 carbonatite and 35 melilitite-carbonatite air-fall layers. ASSOCIATED SILICATE ROCKS: Nephelinitic tuffs and agglomerates with subsidiary lavas of nephelinite, melilite nephelinite, phonolitic trachyte and sodalite phonolite.
Jen_0000578	MAGMATIC STYLE: Tuffs on the Eyasi Plateau probably emanated from Sadiman and include the Laetoli Beds which contain approximately 25 carbonatite and 35 melilitite-carbonatite air-fall layers. ASSOCIATED SILICATE ROCKS: Nephelinitic tuffs and agglomerates with subsidiary lavas of nephelinite, melilite nephelinite, phonolitic trachyte and sodalite phonolite.

5 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_0000432	3.38	3.26	3.32±0.06	K-Ar	240642	Sadiman Volcano, Arusha Region, Tanzania	Sadiman Complex	Ernst and Bell (2010)	10.1007/s00710-009-0074-1	MP98_55
Jen_0000433	4.9	4.1	4.5±0.4	K-Ar	240642	Sadiman Volcano, Arusha Region, Tanzania	Sadiman Complex	Ernst and Bell (2010)	10.1007/s00710-009-0074-1	MP98_55
Jen_0000576	3.91	3.91	3.91		240642	Sadiman Volcano, Arusha Region, Tanzania	Sadiman	Woolley and Kjarsgaard (2008)	10.4095/225115	GSCOF5796
Jen_0000577	3.38	3.26	3.32±0.06	K-Ar	240642	Sadiman Volcano, Arusha Region, Tanzania	Sadiman	Woolley and Kjarsgaard (2008)	10.4095/225115	GSCOF5796
Jen_0000578	4.9	4.1	4.5±0.4	K-Ar	240642	Sadiman Volcano, Arusha Region, Tanzania	Sadiman	Woolley and Kjarsgaard (2008)	10.4095/225115	GSCOF5796

Sample	Source Locality	Reference URL

All locality data graciously provided by mindat.org

All age data...