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Merume River, Rest of Region 8, Potaro-Siparuni Region, Guyana i
Regional Level Types
Merume River River
Rest of Region 8 Municipality
Potaro-Siparuni Region Region
Guyana Country

Regional Level Types
Merume River	River
Rest of Region 8	Municipality
Potaro-Siparuni Region	Region
Guyana	Country

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Merume Rive / Director Creek Area, Guiana (Guyana)

Merume River, Rest of Region 8, Potaro-Siparuni Region, Guyana

Merume River Area, Guiana (Guyana)

Merume River, Rest of Region 8, Potaro-Siparuni Region, Guyana

Guyanaite

Merume River, Rest of Region 8, Potaro-Siparuni Region, Guyana

Guyanaite

Merume River, Rest of Region 8, Potaro-Siparuni Region, Guyana

Merume Rive / Director Creek Area, Guiana (Guyana)

Merume River, Rest of Region 8, Potaro-Siparuni Region, Guyana

Merume River Area, Guiana (Guyana)

Merume River, Rest of Region 8, Potaro-Siparuni Region, Guyana

Guyanaite

Merume River, Rest of Region 8, Potaro-Siparuni Region, Guyana

Guyanaite

Merume River, Rest of Region 8, Potaro-Siparuni Region, Guyana

Merume Rive / Director Creek Area, Guiana (Guyana)

Merume River, Rest of Region 8, Potaro-Siparuni Region, Guyana

Merume River Area, Guiana (Guyana)

Merume River, Rest of Region 8, Potaro-Siparuni Region, Guyana

Latitude & Longitude (WGS84):

5° 16' 0'' North , 59° 49' 59'' West

Latitude & Longitude (decimal):

Type:

Köppen climate type:

Af : Tropical rainforest climate

Mindat Locality ID:

1969

Long-form identifier:

mindat:1:2:1969:2

GUID (UUID V4):

The Merume River is a river of Guyana, a tributary of the Kamarang River.

Merume is also the name of a nearby mountain, which is 30 miles (ca. 48 km) east of Mount Roraima. Director Creek is a tributary of Merume River. First Falls is a feature of the river which also limits travel by boat.

Kamakusa was a settlement along the river, and formerly a government center.

Original locality for Merumite.

Merumite was originally listed in American Mineralogist: 34(3-4): 339 as a new mineral name (see http://www.minsocam.org/ammin/AM34/AM34_339.pdf)

In 1967 Milton et al. showed it to consist of fine-grained intergrowths predominantly of eskolaite (Cr2O3), quartz, and occasionally with 4 new minerals (bracewellite, grimaldiite, guyanaite and mcconnellite, see https://pubs.usgs.gov/publication/pp887)

Note: Most tested specimens of merumite are virtually all eskolaite (Tony Nikischer, 2012, personal communication).

Merumite occurs as black rounded grains in alluvial gravels of the drainage basin of the Merume River, Guyana.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List

ⓘ Bracewellite (TL)

ⓘ Eskolaite

ⓘ Gahnite

ⓘ Grimaldiite (TL)

ⓘ Guyanaite (TL)

ⓘ Mcconnellite (TL)

11 valid minerals. 4 (TL) - type locality of valid minerals.

Rock Types Recorded

Note: data is currently VERY limited. Please bear with us while we work towards adding this information!

Select Rock List Type

Alphabetical List Tree Diagram

ⓘ 'Jasper'

Detailed Mineral List:

ⓘ Bracewellite (TL)

Formula: CrO(OH)

Type Locality:

Description: River gravels.

References:

Geol.Soc.Amer.,Progr.Ann. Meeting (1967) p. 151.

Livingstone, A., Jackson, B., Davidson, P. J. (1984) Grimaldiite, CrOOH, a second occurrence, from the Hiaca Mine, Colquechaca, Bolivia. Mineralogical Magazine, 48 (349) 560-562 doi:10.1180/minmag.1984.048.349.16

ⓘ Eskolaite

Formula: Cr₂O₃

References:

ⓘ Gahnite

Formula: ZnAl₂O₄

References:

Milton, C., Appleman, D. E., Appleman, M. H., Chao, E. C. T., Cuttitta, F., Dinnin, J. I., Dwornik, E. J., Ingram, B. L. and Rose, H. J., Jr. (1976) Merumite, a complex assemblage of chromium minerals from Guyana. U.S. Geological Survey Professional Paper 887: 1-29.

ⓘ Grimaldiite (TL)

Formula: CrO(OH)

Type Locality:

Description: River gravels.

References:

Geol.Soc.Amer.,Progr.Ann. Meeting (1967) p. 151.

ⓘ Guyanaite (TL)

Formula: CrO(OH)

Type Locality:

Description: River gravels.

References:

Geol.Soc.Amer.,Progr.Ann. Meeting (1967) p. 151.

ⓘ Mcconnellite (TL)

Formula: CuCrO₂

Type Locality:

Description: River gravels.

References:

Geological Society of America, Progr. Ann. Meeting (1967) p. 151.

ⓘ 'Merumite'

References:

Am. Mineral., 34, 339 (1949)

ⓘ Native Gold

Formula: Au

References:

ⓘ Native Silver

Formula: Ag

References:

ⓘ Pyrophyllite

Formula: Al₂Si₄O₁₀(OH)₂

References:

ⓘ Quartz

Formula: SiO₂

References:

ⓘ Topaz

Formula: Al₂(SiO₄)(F,OH)₂

References:

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
ⓘ	Native Gold	1.AA.05	Au
ⓘ	Native Silver	1.AA.05	Ag
Group 4 - Oxides and Hydroxides
ⓘ	Mcconnellite (TL)	4.AB.15	CuCrO₂
ⓘ	Gahnite	4.BB.05	ZnAl₂O₄
ⓘ	Eskolaite	4.CB.05	Cr₂O₃
ⓘ	Quartz	4.DA.05	SiO₂
ⓘ	Bracewellite (TL)	4.FD.10	CrO(OH)
ⓘ	Guyanaite (TL)	4.FD.10	CrO(OH)
ⓘ	Grimaldiite (TL)	4.FE.20	CrO(OH)
Group 9 - Silicates
ⓘ	Topaz	9.AF.35	Al₂(SiO₄)(F,OH)₂
ⓘ	Pyrophyllite	9.EC.10	Al₂Si₄O₁₀(OH)₂
Unclassified
ⓘ	'Merumite'	-

List of minerals for each chemical element

H	Hydrogen
H	ⓘ Bracewellite	CrO(OH)
H	ⓘ Grimaldiite	CrO(OH)
H	ⓘ Guyanaite	CrO(OH)
H	ⓘ Pyrophyllite	Al₂Si₄O₁₀(OH)₂
H	ⓘ Topaz	Al₂(SiO₄)(F,OH)₂
O	Oxygen
O	ⓘ Bracewellite	CrO(OH)
O	ⓘ Eskolaite	Cr₂O₃
O	ⓘ Gahnite	ZnAl₂O₄
O	ⓘ Grimaldiite	CrO(OH)
O	ⓘ Guyanaite	CrO(OH)
O	ⓘ Mcconnellite	CuCrO₂
O	ⓘ Pyrophyllite	Al₂Si₄O₁₀(OH)₂
O	ⓘ Quartz	SiO₂
O	ⓘ Topaz	Al₂(SiO₄)(F,OH)₂
F	Fluorine
F	ⓘ Topaz	Al₂(SiO₄)(F,OH)₂
Al	Aluminium
Al	ⓘ Gahnite	ZnAl₂O₄
Al	ⓘ Pyrophyllite	Al₂Si₄O₁₀(OH)₂
Al	ⓘ Topaz	Al₂(SiO₄)(F,OH)₂
Si	Silicon
Si	ⓘ Pyrophyllite	Al₂Si₄O₁₀(OH)₂
Si	ⓘ Quartz	SiO₂
Si	ⓘ Topaz	Al₂(SiO₄)(F,OH)₂
Cr	Chromium
Cr	ⓘ Bracewellite	CrO(OH)
Cr	ⓘ Eskolaite	Cr₂O₃
Cr	ⓘ Grimaldiite	CrO(OH)
Cr	ⓘ Guyanaite	CrO(OH)
Cr	ⓘ Mcconnellite	CuCrO₂
Cu	Copper
Cu	ⓘ Mcconnellite	CuCrO₂
Zn	Zinc
Zn	ⓘ Gahnite	ZnAl₂O₄
Ag	Silver
Ag	ⓘ Native Silver	Ag
Au	Gold
Au	ⓘ Native Gold	Au

Other Databases

Wikipedia:	https://en.wikipedia.org/wiki/Merume_River
Wikidata ID:	Q6820781

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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

Other Databases

Other Regions, Features and Areas containing this locality

References

Merume River, Rest of Region 8, Potaro-Siparuni Region, Guyana i
Regional Level Types
Merume River River
Rest of Region 8 Municipality
Potaro-Siparuni Region Region
Guyana Country