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:
Los Archipelago (Los Islands), Guinea

Oldest recorded age at locality: 106
Youngest recorded age at locality: 102.6

mindat Locality ID: 13674
mindat URL: http://www.mindat.org/loc-13674.html

Tectonic Settings:

Total number of sublocalities beneath "Los Archipelago (Los Islands), Guinea": 2
Total number of bottom-level sublocalities: 2

Number of Child Localities: 2
Child Localities:
Kassa Island
Rouma Island (Roume Island; Roma Island; Ruma Island)

Latitude: 9°28'54"N
Longitude: 13°46'40"W
Decimal Degree (lat, lon): 9.4816666666667,-13.777777777778

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	Analcime	Apatite	Astrophyllite	Calcite	Cancrinite	Cancrinite-sodalite	Catapleiite	Clay	Corundum
Eudialyte	Feldspar	Fluorite	Garnet	Kaolinite	Löllingite	Mica	Molybdenite	Natrolite	Nickeline
None	Pectolite	Pyrite	Pyroxene	Quartz	Rocksalt	Serpentine	Sodalite	Sphalerite	Spinel
Steacyite	Titanite	Tridymite	Wöhlerite	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 As Be C Ca Ce Cl F Fe H K Mg Mn Mo Na Nb O P Pb REE S Si Th Ti Zn Zr

Elements from minerals reported directly at this locality: Al As Ca Ce F Fe H K Mg Mn Na Nb O REE S Si Ti Zr

Structural Groups for minerals in this locality:
Amphibole Analcime Apatite Astrophyllite Calcite Cancrinite Cancrinite-sodalite Catapleiite Clay Corundum
Eudialyte Feldspar Fluorite Garnet Kaolinite Löllingite Mica Molybdenite Natrolite Nickeline
None Pectolite Pyrite Pyroxene Quartz Rocksalt Serpentine Sodalite Sphalerite Spinel
Steacyite Titanite Tridymite Wöhlerite Zircon

55 IMA Minerals at location:

Aegirine ()*	Albite ()*	Analcime ()*	Andradite ()*	Arfvedsonite ()*
Astrophyllite ()*	Augite ()*	Britholite-(Ce) ()*	Calcite ()*	Cancrinite ()*
Catapleiite ()*	Eudialyte ()*	Fluorapatite ()*	Fluorite ()*	Galena ()*
Gibbsite ()*	Grossular ()*	Hastingsite ()*	Haüyne ()*	Hiortdahlite ()*
Ilmenite ()*	Kaolinite ()*	Kupletskite ()*	Låvenite ()*	Leucophanite ()*
Löllingite ()*	Magnetite ()*	Microcline ()*	Molybdenite ()*	Mosandrite-(Ce) ()*
Muscovite ()*	Nacareniobsite-(Ce) ()*	Natrolite ()*	Nepheline ()*	Normandite ()*
Nosean ()*	Odinite ()*	Orthoclase ()*	Pyrite ()*	Pyrophanite ()*
Pyrrhotite ()*	Quartz ()*	Rinkite-(Ce) ()*	Rosenbuschite ()*	Roumaite ()*
Sanidine ()*	Serandite ()*	Sodalite ()*	Sphalerite ()*	Steacyite ()*
Titanite ()*	Villiaumite ()*	Vishnevite ()*	Wöhlerite ()*	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	106	102.6	1	64684	1022
Albite ()*	Feldspar	Na(AlSi₃O₈)	106	102.6	1	64684	8803
Analcime ()*	Analcime	Na(AlSi₂O₆)·H₂O	106	102.6	1	64684	1627
Andradite ()*	Garnet	Ca₃Fe³⁺₂(SiO₄)₃	106	102.6	0		1534
Arfvedsonite ()*	Amphibole	NaNa₂(Fe²⁺₄Fe³⁺)Si₈O₂₂(OH)₂	106	102.6	1	64684	295
Astrophyllite ()*	Astrophyllite	K₂NaFe²⁺₇Ti₂(Si₄O₁₂)₂O₂(OH)₄F	106	102.6	2	64683,64684	161
Augite ()*	Pyroxene	(Ca,Mg,Fe)₂Si₂O₆	106	102.6	1	64684	2060
Britholite-(Ce) ()*	Apatite	(Ce,Ca)₅(SiO₄)₃(OH)	106	102.6	0		115
Calcite ()*	Calcite	Ca(CO₃)	106	102.6	1	64684	27770
Cancrinite ()*	Cancrinite	(Na,Ca, )₈(Al₆Si₆)O₂₄(CO₃,SO₄)₂·2H₂O	106	102.6	1	64684	232
Catapleiite ()*	Catapleiite	Na₂Zr(Si₃O₉)·2H₂O	106	102.6	1	64684	113
Eudialyte ()*	Eudialyte	Na₁₅Ca₆Fe₃Zr₃Si(Si₂₅O₇₃)(O,OH,H₂O)₃(Cl,OH)₂	106	102.6	1	64684	182
Fluorapatite ()*	Apatite	Ca₅(PO₄)₃F	106	102.6	1	64684	2740
Fluorite ()*	Fluorite	CaF₂	106	102.6	2	64683,64684	9617
Galena ()*	Rocksalt	PbS	106	102.6	1	64684	24243
Gibbsite ()*	None	Al(OH)₃	106	102.6	1	64684	504
Grossular ()*	Garnet	Ca₃Al₂(SiO₄)₃	106	102.6	1	64684	1544
Hastingsite ()*	Amphibole	NaCa₂(Fe²⁺₄Fe³⁺)(Si₆Al₂)O₂₂(OH)₂	106	102.6	1	64684	209
Haüyne ()*	Sodalite Cancrinite-sodalite	Na₃Ca(Si₃Al₃)O₁₂(SO₄)	106	102.6	0		158
Hiortdahlite ()*	Wöhlerite	Na₂Ca₄(Ca_0.5Zr_0.5)Zr(Si₂O₇)₂OF₃	106	102.6	1	64684	21
Ilmenite ()*	Corundum	Fe²⁺Ti⁴⁺O₃	106	102.6	1	64684	5433
Kaolinite ()*	Clay Kaolinite	Al₂Si₂O₅(OH)₄	106	102.6	0		5591
Kupletskite ()*	Astrophyllite	K₂NaMn²⁺₇Ti₂(Si₄O₁₂)₂O₂(OH)₄F	106	102.6	1	64684	33
Låvenite ()*	Wöhlerite	(Na,Ca)₄(Mn²⁺,Fe²⁺)₂(Zr,Ti,Nb)₂(Si₂O₇)₂(O,F)₄	106	102.6	1	64684	58
Leucophanite ()*	None	NaCaBeSi₂O₆F	106	102.6	1	64684	55
Löllingite ()*	Löllingite	FeAs₂	106	102.6	0		762
Magnetite ()*	Spinel	Fe²⁺Fe³⁺₂O₄	106	102.6	1	64684	14899
Microcline ()*	Feldspar	K(AlSi₃O₈)	106	102.6	1	64684	4924
Molybdenite ()*	Molybdenite	MoS₂	106	102.6	1	64684	5800
Mosandrite-(Ce) ()*	None	(Ca₃REE)[(H₂O)₂Ca_0.5 _0.5]Ti(Si₂O₇)₂(OH)₂(H₂O)₂	106	102.6	0		45
Muscovite ()*	Mica Clay	KAl₂(Si₃Al)O₁₀(OH)₂	106	102.6	1	64684	17380
Nacareniobsite-(Ce) ()*	None	(Ca₃REE)Na₃Nb(Si₂O₇)₂(OF)F₂	106	102.6	0		10
Natrolite ()*	Natrolite	Na₂(Si₃Al₂)O₁₀·2H₂O	106	102.6	1	64684	1236
Nepheline ()*	Tridymite	Na₃K(Al₄Si₄O₁₆)	106	102.6	1	64684	884
Normandite ()*	Wöhlerite	Na₂Ca₂(Mn,Fe)₂(Ti,Nb,Zr)₂(Si₂O₇)₂O₂F₂	106	102.6	0		10
Nosean ()*	Sodalite Cancrinite-sodalite	Na₈(Si₆Al₆)O₂₄(SO₄)·H₂O	106	102.6	0		75
Odinite ()*	Clay Serpentine	(Fe³⁺,Mg,Al,Fe²⁺)_2.5(Si,Al)₂O₅(OH)₄	106	102.6	0		4
Orthoclase ()*	Feldspar	K(AlSi₃O₈)	106	102.6	0		2349
Pyrite ()*	Pyrite	FeS₂	106	102.6	1	64684	39462
Pyrophanite ()*	Corundum	Mn²⁺TiO₃	106	102.6	1	64684	244
Pyrrhotite ()*	Nickeline	Fe₇S₈	106	102.6	1	64684	9056
Quartz ()*	Quartz	SiO₂	106	102.6	0		61156
Rinkite-(Ce) ()*	None	(Ca₃REE)Na(NaCa)Ti(Si₂O₇)₂(OF)F₂	106	102.6	1	64684	53
Rosenbuschite ()*	None	Ca₆Zr₂Na₆ZrTi(Si₂O₇)₄(OF)₂F₄	106	102.6	1	64684	42
Roumaite ()*	None	(Nb,Ti)(Ca,Na, )₃(Ca,REE)₄(Si₂O₇)₂(OH)F₃	106	102.6	1	64684	1
Sanidine ()*	Feldspar	K(AlSi₃O₈)	106	102.6	0		598
Serandite ()*	Pectolite	NaMn²⁺₂Si₃O₈(OH)	106	102.6	1	64684	38
Sodalite ()*	Cancrinite-sodalite Sodalite	Na₄(Si₃Al₃)O₁₂Cl	106	102.6	1	64684	444
Sphalerite ()*	Sphalerite	ZnS	106	102.6	1	64684	21482
Steacyite ()*	Steacyite	K_0.3(Na,Ca)₂ThSi₈O₂₀	106	102.6	1	64684	8
Titanite ()*	Titanite	CaTi(SiO₄)O	106	102.6	1	64684	4899
Villiaumite ()*	Rocksalt	NaF	106	102.6	2	64683,64684	31
Vishnevite ()*	Cancrinite-sodalite Cancrinite	Na₈(Al₆Si₆)O₂₄(SO₄)·2H₂O	106	102.6	1	64684	21
Wöhlerite ()*	Wöhlerite	Na₂Ca₄Zr(Nb,Ti)(Si₂O₇)₂(O,F)₄	106	102.6	1	64684	83
Zircon ()*	Zircon	Zr(SiO₄)	106	102.6	1	64684	5251

1 Ages assigned to this locality:

	Excel ID	Max Age (Ma)	Min Age (Ma)	Age as listed in reference	Dating Method	Age Interpret	Prioritized?	Sample Source	Sample Num	Run Num	Age from other Locality	Dated Mineral	Minerals explicitely stated as having this age	Age applies to these Elements	MinDat Locality ID	Dated Locality (Max Age)	Location as listed in reference	Reference	Reference DOI	Reference ID	Age Notes
	ree-00359	106	102.6	104.3 ± 1.7 Ma (Rb-Sr, whole rock)	Rb-Sr			whole rock							13674	Los Archipelago (Los Islands), Guinea	Los Archipelago (Los Islands, Iles de Los)	Orris and Grauch (2002)		USGSOFR02_189

Sample	Source Locality	Reference URL

All locality data graciously provided by mindat.org

All age data...