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Ras Gemsa, Al Bahr al Ahmar, Red Sea Governorate, Egypti
Regional Level Types
Ras Gemsa- not defined -
Al Bahr al Ahmar- not defined -
Red Sea GovernorateGovernorate
EgyptCountry

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Latitude & Longitude (WGS84):
27° 39' North , 33° 35' East
Latitude & Longitude (decimal):
27.65000,33.58333
GeoHash:
G#: sszvk1w8u
GRN:
N19E22
Köppen climate type:
BWh : Hot deserts climate
Nearest Settlements:
PlacePopulationDistance
El Gouna15,000 (2016)29.9km
Hurghada95,622 (2014)49.2km
Mindat Locality ID:
158268
Long-form identifier:
mindat:1:2:158268:3
GUID (UUID V4):
0


Biogenic dolomite, calcite, and native sulphur, formed by the action of sulphate-reducing bacteria on evaporites, including anhydrite, overlying mid-Miocene hydrocarbon-bearing strata. The hydrocarbons might have been the reducing agents in view of the occurrence of petroleum at depth.

The sulfur occurs in an uplifted horst block consisting of evaporite-carbonate rocks overlying the middle Miocene oil- and gas-bearing strata. The evaporite deposits are interpreted to be a composite sequence that includes deposits of shallow lagoonal (subaqueous) and supratidal (sabkha) environments.

The sulphur occurs as fine disseminations in Miocene anhydrite and in more coarsely crystalline form in fissures and cavities in anhydritic dolomite and in interstices between rosettes of eucrystalline aragonite. The aragonite layers overlie anhydrite and thus occupy an anomalous position in the normal evaporite sequence.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List


5 valid minerals.

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
ⓘNative Sulphur1.CC.05S8
Group 5 - Nitrates and Carbonates
ⓘCalcite5.AB.05CaCO3
ⓘDolomite5.AB.10CaMg(CO3)2
ⓘAragonite5.AB.15CaCO3
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
ⓘAnhydrite7.AD.30CaSO4

List of minerals for each chemical element

CCarbon
Cⓘ AragoniteCaCO3
Cⓘ CalciteCaCO3
Cⓘ DolomiteCaMg(CO3)2
OOxygen
Oⓘ AnhydriteCaSO4
Oⓘ AragoniteCaCO3
Oⓘ CalciteCaCO3
Oⓘ DolomiteCaMg(CO3)2
MgMagnesium
Mgⓘ DolomiteCaMg(CO3)2
SSulfur
Sⓘ AnhydriteCaSO4
Sⓘ Native SulphurS8
CaCalcium
Caⓘ AnhydriteCaSO4
Caⓘ AragoniteCaCO3
Caⓘ CalciteCaCO3
Caⓘ DolomiteCaMg(CO3)2

Other Regions, Features and Areas containing this locality

African PlateTectonic Plate
Egypt

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

Schnellmann, G.A. (1959) Formation of sulfur by reduction of anhydrite at Ras Gemsa, Egypt. Economic Geology: 54(5)(August, 1959): 889-894.
Youssef, E.L. and Sayed, A.A. (1988) Journal of the Japan Association of Mineralogists, Petrologists and Economic Geologists, 83, 296-307.
Youssef, E.L. and Sayed, A. A. (1989) Geology and genesis of sulfur deposits at Ras Gemsa area, Red Sea coast, Egypt. Geology, 17(9), 797.
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