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Grand Comore, Comorosi
Regional Level Types
Grand ComoreIsland
ComorosCountry

Flag of Grand Comore
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PhotosMapsSearchMineralogy
Type:
Island
Age:
0.13 ± 0.02 to 0.01 Ma
Geologic Time:
Quaternary
Dating method:
K-Ar
Reference for age:
Hajash & Armstrong (1972); Emerick & Duncan (1982)
Largest Settlements:
PlacePopulation
Moroni42,872 (2010)
Mbéni6,516 (2012)
Ouellah5,478 (2017)
Mitsoudjé5,000 (2018)
Mvouni4,791 (2012)
Tsidjé4,600 (2012)
Mindat Locality ID:
405422
Long-form identifier:
mindat:1:2:405422:4
GUID (UUID V4):
0
Other Languages:
View 52 more...
French:
Grande Comore, Comores
German:
Grande Comore, Komoren
Italian:
Grande Comore, Comore
Russian:
Нгазиджа, Коморы
Simplified Chinese:
大科摩罗岛, 葛摩
Spanish:
Gran Comora, Comoras
Arabic:
القمر الكبرى, جزر القمر
Asturian:
Gran Comora, Comores
Azeri:
Nqazica, Komoros
Basque:
Komora Handia, Komoreak
Belarusian:
Нгазіджа, Каморы
Belarusian (Tarashkevitsa):
Гранд-Камор, Каморскія астравы
Bengali:
গ্রান্ডে কোমোর, কমোরোস
Breton:
Ngazidja, Komorez
Catalan:
Grande Comore, Comores
Cebuano:
Grande Comore, Comoros
Croatian:
Grande Comore, Komori
Czech:
Ngazidja, Komory
Danish:
Grande Comore, Comorerne
Dutch:
Grande Comore, Comoren
Esperanto:
Granda Komoro, Komoroj
Farsi/Persian:
گرند کومور, اتحاد قمر
Finnish:
Iso-Komori, Komorit
Galician:
Gran Comora, Comores
Georgian:
ნგაზიჯა, კომორის კუნძულები
Greek:
Μεγάλη Κομόρα, Κομόρες
Guarani:
Komóra Guasu, Komóra
Gujarati:
ગ્રાન્દે કોમોર, કોમોરસ
Hebrew:
גרנד קומורו, קומורו
Hindi:
ग्रैंडे कोमोर, कोमोरोस
Indonesian:
Komoro Besar, Komoro
Japanese:
グランドコモロ島, コモロ
Kannada:
ಗ್ರಾಂಡೆ ಕೊಮೊರ್, ಕೊಮೊರೊಸ್
Korean:
그랑드코모르섬, 코모로
Latvian:
Nazidža , Komoras
Lithuanian:
Grand Komoras, Komorai
Malagasy:
Ngazija, Kômôro
Malay:
Grande Comore, Comoros
Marathi:
ग्रान्दे कोमोर, कोमोरोस
Norwegian:
Grande Comore, Komorene
Occitan:
Ngazidja, Comòras
Polish:
Wielki Komor, Komory
Portuguese:
Grande Comore, Comores
Scots:
Grande Comore, Comoros
Serbian:
Велики Комори, Комори
Sinhalese:
ග්‍රන්ඩේ කොමෝර්, කොමරොස්
Swahili:
Ngazija, Komori
Swedish:
Grande Comore, Komorerna
Tamil:
கிராண்டே காமோரே, கொமொரோசு
Telugu:
గ్రాండ్ కోమోర్, కొమొరోస్
Thai:
เกาะกร็องด์กอมอร์, ประเทศคอโมโรส
Traditional Chinese:
大科摩羅島, 科摩羅
Turkish:
Büyük Komor, Komorlar
Ukrainian:
Великий Комор, Коморські Острови
Urdu:
قمر الکبری, اتحاد القمری
Vietnamese:
Grande Comore, Comoros
West Frisian:
Grut Komoare, Komoaren
Wu Chinese:
大科摩罗岛, 科摩羅


65 km long. The island consists of 2 coalescing volcanoes: La Grille in the north and Karthala (Kartala, Ngazidja) which rises to 2361 m, to the south. The volcanoes are essentially undissected and Karthala has been recently active.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List

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

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:

ⓘ Augite
Formula: (CaxMgyFez)(Mgy1Fez1)Si2O6
ⓘ 'Clinopyroxene Subgroup'
ⓘ 'Fayalite-Forsterite Series'
ⓘ 'Feldspar Group'
ⓘ 'Glass'
ⓘ Nepheline
Formula: Na3K(Al4Si4O16)
ⓘ 'Plagioclase'
Formula: (Na,Ca)[(Si,Al)AlSi2]O8

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 9 - Silicates
ⓘAugite9.DA.15(CaxMgyFez)(Mgy1Fez1)Si2O6
ⓘNepheline9.FA.05Na3K(Al4Si4O16)
Unclassified
ⓘ'Feldspar Group'-
ⓘ'Clinopyroxene Subgroup'-
ⓘ'Fayalite-Forsterite Series'-
ⓘ'Plagioclase'-(Na,Ca)[(Si,Al)AlSi2]O8
ⓘ'Glass'-

List of minerals for each chemical element

OOxygen
Oⓘ Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
Oⓘ NephelineNa3K(Al4Si4O16)
Oⓘ Fayalite-Forsterite Series
Oⓘ Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
NaSodium
Naⓘ NephelineNa3K(Al4Si4O16)
Naⓘ Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
MgMagnesium
Mgⓘ Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
Mgⓘ Fayalite-Forsterite Series
AlAluminium
Alⓘ NephelineNa3K(Al4Si4O16)
Alⓘ Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
SiSilicon
Siⓘ Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
Siⓘ NephelineNa3K(Al4Si4O16)
Siⓘ Fayalite-Forsterite Series
Siⓘ Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
KPotassium
Kⓘ NephelineNa3K(Al4Si4O16)
CaCalcium
Caⓘ Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
Caⓘ Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
FeIron
Feⓘ Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
Feⓘ Fayalite-Forsterite Series

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/Grande_Comore
Wikidata ID:Q244978
GeoNames ID:921881

Localities in this Region

Comoros

Other Regions, Features and Areas that Intersect

AfricaContinent
Comoro IslandsArchipelago
Indian Ocean
Somali PlateTectonic Plate

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

STRONG, D. F. (1972) The Petrology of the Lavas of Grande Comore. Journal of Petrology, 13 (2) 181-218 doi:10.1093/petrology/13.2.181
Hajash, Andrew, Armstrong, Richard Lee (1972) Paleomagnetic and radiometric evidence for the age of the Comores Islands, west central Indian Ocean. Earth and Planetary Science Letters, 16 (2) 231-236 doi:10.1016/0012-821x(72)90195-1
Emerick, C.M., Duncan, R.A. (1982) Age progressive volcanism in the Comores Archipelago, western Indian Ocean and implications for Somali plate tectonics. Earth and Planetary Science Letters, 60 (3) 415-428 doi:10.1016/0012-821x(82)90077-2
SPĀTH, ANDREAS, ROEX, ANTON P. LE, DUNCAN, ROBERT A. (1996) The Geochemistry of Lavas from the Gomores Archipelago, Western Indian Ocean: Petrogenesis and Mantle Source Region Characteristics. Journal of Petrology, 37 (4) 961-991 doi:10.1093/petrology/37.4.961
Deniel, C (1998) Geochemical and isotopic (Sr, Nd, Pb) evidence for plume–lithosphere interactions in the genesis of Grande Comore magmas (Indian Ocean). Chemical Geology, 144 (3-4). p.281-303. doi:10.1016/s0009-2541(97)00139-3
Class, C., Goldstein, S. L., Altherr, R., & Bachèlery, P. (1998). The process of plume–lithosphere interactions in the ocean basins—the case of Grande Comore. Journal of Petrology, 39(5), 881-903. doi.org/10.1093/petroj/39.5.881
Claude-Ivanaj, C., Bourdon, B., & Allègre, C. J. (1998). Ra–Th–Sr isotope systematics in Grande Comore Island: a case study of plume–lithosphere interaction. Earth and Planetary Science Letters, 164(1-2), 99-117. doi.org/10.1016/S0012-821X(98)00195-2
Bourdon, B., Joron, J. L., Claude-Ivanaj, C., & Allègre, C. J. (1998). U–Th–Pa–Ra systematics for the Grande Comore volcanics: melting processes in an upwelling plume. Earth and Planetary Science Letters, 164(1-2), 119-133. doi.org/10.1016/S0012-821X(98)00227-1
Coltorti, M., Bonadiman, C., Hinton, R. W., Siena, F., Upton, B. G. J. (1999) Carbonatite Metasomatism of the Oceanic Upper Mantle: Evidence from Clinopyroxenes and Glasses in Ultramafic Xenoliths of Grande Comore, Indian Ocean. Journal of Petrology, 40 (1) 133-165 doi:10.1093/petroj/40.1.133
Savin, Cécile, Grasso, Jean-Robert, Bachelery, Patrick (2005) Seismic signature of a phreatic explosion: hydrofracturing damage at Karthala volcano, Grande Comore Island, Indian Ocean. Bulletin of Volcanology, 67 (8). 717-731 doi:10.1007/s00445-005-0411-0
Bachelery, P., Lenat, J. F., Di Muro, A., & Michon, L. (Eds.). (2015). Active Volcanoes of the Southwest Indian Ocean: Piton de la Fournaise and Karthala. Springer, Berlin.
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