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Bioko Island, Insular Region, Equatorial Guinea i
Regional Level Types
Bioko Island Island
Insular Region Region
Equatorial Guinea Country

Regional Level Types
Bioko Island	Island
Insular Region	Region
Equatorial Guinea	Country

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Predictive Mineralogy

Type:

Island

Age:

Up to 0.7 Ma

Geologic Time:

Pleistocene

Dating method:

Numerous paleomagnetic measurements

Reference for age:

Piper, J. D. A., & Richardson, A. (1972). The palaeomagnetism of the Gulf of Guinea volcanic province, West Africa. Geophysical Journal International, 29(2), 147-171.

Largest Settlements:

Place	Population
Malabo	155,963 (2018)
Luba	8,655 (2012)
Rebola	5,450 (2013)
Santiago de Baney	2,365 (2013)
Ciudad de Riaba	971 (2012)

Mindat Locality ID:

300975

Long-form identifier:

mindat:1:2:300975:1

GUID (UUID V4):

Other/historical names associated with this locality:

Fernando Po

Other Languages:

View 50 more...

French:

Bioko, Région insulaire, Guinée équatoriale

German:

Bioko, Äquatorialguinea

Italian:

Bioko, Regione Insulare, Guinea Equatoriale

Russian:

Биоко, Инсуляр, Экваториальная Гвинея

Simplified Chinese:

比奥科岛, 海岛大区, 赤道几内亚

Spanish:

Bioko, Región Insular, Guinea Ecuatorial

Arabic:

بيوكو, غينيا الاستوائية

Armenian:

Բիոկո, Հասարակածային Գվինեա

Asturian:

Bioko, Guinea Ecuatorial

Azeri:

Bioko, Ekvatorial Qvineya

Basque:

Bioko, Ekuatore Ginea

Belarusian:

Біёка, Экватарыяльная Гвінея

Breton:

Bioko, Ginea ar C'heheder

Bulgarian:

Биоко, Екваториална Гвинея

Catalan:

Bioko, Illes de Guinea Equatorial, Guinea Equatorial

Cebuano:

Isla de Bioko, Gineang Ekwatoryal

Central Bikol:

Fernando Poo, Guineyang Ekwatoryal

Croatian:

Bioko, Ekvatorska Gvineja

Czech:

Bioko, Rovníková Guinea

Danish:

Bioko, Ækvatorialguinea

Dutch:

Bioko, Insular Region, Equatoriaal-Guinea

Egyptian Arabic:

بيوكو, جينيا الاستوائيه

Esperanto:

Bioko, Insula Regiono, Ekvatora Gvineo

Farsi/Persian:

بیوکو, گینه استوایی

Finnish:

Bioko, Päiväntasaajan Guinea

Galician:

Bioko, Guinea Ecuatorial

Georgian:

ბიოკო, კუნძულოვანი რეგიონი, ეკვატორული გვინეა

Greek:

Μπιόκο, Ισημερινή Γουινέα

Hebrew:

ביוקו, גינאה המשוונית

Hungarian:

Bioko szigete, Egyenlítői-Guinea

Indonesian:

Bioko, Guinea Khatulistiwa

Japanese:

ビオコ島, 島嶼地方, 赤道ギニア

Korean:

비오코섬, 적도 기니 도서 지방, 적도 기니

Latin:

Bioko, Guinea Aequatorensis

Lithuanian:

Biokas, Pusiaujo Gvinėja

Macedonian:

Биоко, Екваторска Гвинеја

Northern Frisian:

Bioko, Ekwatoriaal-Guinea

Norwegian:

Bioko, Ekvatorial-Guinea

Polish:

Bioko, Gwinea Równikowa

Portuguese:

Bioko, Região Insular, Guiné Equatorial

Romanian:

Insula Bioko, Guineea Ecuatorială

Scots:

Bioko, Equatorial Guinea

Serbian:

Биоко, Екваторијална Гвинеја

Serbo-Croatian:

Bioko, Ekvatorijalna Gvineja

Slovak:

Bioko, Rovníková Guinea

Slovenian:

Bioko, Ekvatorialna Gvineja

Swedish:

Bioko, Ekvatorialguinea

Thai:

บีโอโก, ภูมิภาคเกาะ, อิเควทอเรียลกินี

Traditional Chinese:

比奧科島, 赤道畿內亞

Ukrainian:

Біоко, Екваторіальна Гвінея

Uzbek (Latin Script):

Bioko oroli, Ekvatorli Gvineya

Vietnamese:

Bioko, Guinea Xích Đạo

Waray:

Bioko, Guinea Ecuatorial

Welsh:

Bioko, Gini Gyhydeddol

Wu Chinese:

比奧科島, 赤道幾內亞

Zulu:

Bioko, Insular Region, IGini Enkabazwe

The island of Bioko is divided into two provinces - north and south.
The island was originally named after a Portuguese navigator in 1472.
Young volcanic island lying 32 km from the Cameroon coast. Only basic volcanic rocks are present and these form a high mountain ridge running the length of the island and reaching the highest point of Pico Sta Isabel (3008 m).

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List

Mineral list contains entries from the region specified including sub-localities

ⓘ Kaersutite

ⓘ Nepheline

2 valid minerals.

Rock Types Recorded

Rock list contains entries from the region specified including sub-localities

Select Rock List Type

Alphabetical List Tree Diagram

Detailed Mineral List:

ⓘ Kaersutite

Formula: NaCa₂(Mg₃AlTi⁴⁺)(Si₆Al₂)O₂₂O₂

References:

Thomé, Raoul C. Mitchell (1970) Geology of the South Atlantic Islands - Beiträge Zur Regionalen Geologie der Erde No. 10. Gerbrüder Borntraeger.

Piper, J. D. A., & Richardson, A. (1972). The palaeomagnetism of the Gulf of Guinea volcanic province, West Africa. Geophysical Journal International, 29(2), 147-171.

Fitton, J. G. (1987). The Cameroon line, West Africa: a comparison between oceanic and continental alkaline volcanism. Geological Society, London, Special Publications, 30(1), 273-291. doi.org/10.1144/GSL.SP.1987.030.01.13

Halliday, A. N., Dickin, A. P., Fallick, A. E., & Fitton, J. G. (1988). Mantle dynamics: a Nd, Sr, Pb and O isotopic study of the Cameroon line volcanic chain. Journal of Petrology, 29(1), 181-211. doi.org/10.1093/petrology/29.1.181

Déruelle, B., Moreau, C., Nkoumbou, C., Kambou, R., Lissom, J., Njonfang, E., Ghogomu, R. T., Nono, A. (1991) The Cameroon Line: A Review. In Magmatism in Extensional Structural Settings. Springer Berlin Heidelberg. p.274-327. doi:10.1007/978-3-642-73966-8_12

Ballentine, C. J., Lee, D. C., & Halliday, A. N. (1997). Hafnium isotopic studies of the Cameroon line and new HIMU paradoxes. Chemical Geology, 139(1-4), 111-124. doi.org/10.1016/S0009-2541(97)00028-4

ⓘ Nepheline

Formula: Na₃K(Al₄Si₄O₁₆)

References:

Thomé, Raoul C. Mitchell (1970) Geology of the South Atlantic Islands - Beiträge Zur Regionalen Geologie der Erde No. 10. Gerbrüder Borntraeger.

Piper, J. D. A., & Richardson, A. (1972). The palaeomagnetism of the Gulf of Guinea volcanic province, West Africa. Geophysical Journal International, 29(2), 147-171.

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 9 - Silicates
ⓘ	Kaersutite	9.DE.15	NaCa₂(Mg₃AlTi⁴⁺)(Si₆Al₂)O₂₂O₂
ⓘ	Nepheline	9.FA.05	Na₃K(Al₄Si₄O₁₆)

List of minerals for each chemical element

O	Oxygen
O	ⓘ Kaersutite	NaCa₂(Mg₃AlTi⁴⁺)(Si₆Al₂)O₂₂O₂
O	ⓘ Nepheline	Na₃K(Al₄Si₄O₁₆)
Na	Sodium
Na	ⓘ Kaersutite	NaCa₂(Mg₃AlTi⁴⁺)(Si₆Al₂)O₂₂O₂
Na	ⓘ Nepheline	Na₃K(Al₄Si₄O₁₆)
Mg	Magnesium
Mg	ⓘ Kaersutite	NaCa₂(Mg₃AlTi⁴⁺)(Si₆Al₂)O₂₂O₂
Al	Aluminium
Al	ⓘ Kaersutite	NaCa₂(Mg₃AlTi⁴⁺)(Si₆Al₂)O₂₂O₂
Al	ⓘ Nepheline	Na₃K(Al₄Si₄O₁₆)
Si	Silicon
Si	ⓘ Kaersutite	NaCa₂(Mg₃AlTi⁴⁺)(Si₆Al₂)O₂₂O₂
Si	ⓘ Nepheline	Na₃K(Al₄Si₄O₁₆)
K	Potassium
K	ⓘ Nepheline	Na₃K(Al₄Si₄O₁₆)
Ca	Calcium
Ca	ⓘ Kaersutite	NaCa₂(Mg₃AlTi⁴⁺)(Si₆Al₂)O₂₂O₂
Ti	Titanium
Ti	ⓘ Kaersutite	NaCa₂(Mg₃AlTi⁴⁺)(Si₆Al₂)O₂₂O₂

Geochronology

Mineralization age: Pleistocene : 1.1 Ma

Important note: This table is based only on rock and mineral ages recorded on mindat.org for this locality and is not necessarily a complete representation of the geochronology, but does give an indication of possible mineralization events relevant to this locality. As more age information is added this table may expand in the future. A break in the table simply indicates a lack of data entered here, not necessarily a break in the geologic sequence. Grey background entries are from different, related, localities.

Geologic Time

Rocks, Minerals and Events

1.1 Ma

Fossils

This region is too big or complex to display the fossil list, try looking at smaller subregions.

Other Databases

Wikipedia:	https://en.wikipedia.org/wiki/Bioko
Wikidata ID:	Q205022
GeoNames ID:	2309792

Localities in this Region

Equatorial Guinea

Insular Region
- ⭔Bioko Norte Province
- ⭔Bioko Sur Province

Other Regions, Features and Areas that Intersect

AfricaContinent

African Plate

Douala basinBasin

Atlantic Ocean

African BasinOceanic Crust

This page contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.

References

Thomé, Raoul C. Mitchell (1970) Geology of the South Atlantic Islands - Beiträge Zur Regionalen Geologie der Erde No. 10. Gerbrüder Borntraeger.

Piper, J. D. A., & Richardson, A. (1972). The palaeomagnetism of the Gulf of Guinea volcanic province, West Africa. Geophysical Journal International, 29(2), 147-171.

Woolley, A. R. (2001) Alkaline Rocks and Carbonatites of the World, Part 3: Africa - Alkaline Rocks and Carbonatites of the World. The Geological Society of London.p.69

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Select Mineral List Type

Mineral List

Rock Types Recorded

Select Rock List Type

Detailed Mineral List:

Gallery:

List of minerals arranged by Strunz 10th Edition classification

List of minerals for each chemical element

Geochronology

Fossils

Other Databases

Localities in this Region

Other Regions, Features and Areas that Intersect

References

Bioko Island, Insular Region, Equatorial Guinea i
Regional Level Types
Bioko Island Island
Insular Region Region
Equatorial Guinea Country