Early Cretaceous layered gabbroic intrusion. The only alkaline rocks are late aegirine bostonite dikes. The intrusion is 7 x 3.5 km and pear-shaped.
The intrusion is undeformed and unmetamorphosed, and is hosted in Neoproterozoic granitoids and metasedimentary rocks of the Southern Kaoko Zone of the Damara Orogen.

Some interest has been shown in the intrusion by mining companies because of the presence of small amounts of native copper in the gabbroic rocks.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List

ⓘ Aegirine

ⓘ 'Fayalite-Forsterite Series'

4 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

ⓘ 'Bostonite'

ⓘ Gabbro

ⓘ Granite

Detailed Mineral List:

ⓘ Aegirine

Formula: NaFe³⁺Si₂O₆

References:

Siedner, G., Miller, J.A. (1968) K-Ar age determinations on basaltic rocks from south-west Africa and their bearing on continental drift. Earth and Planetary Science Letters, 4 (6). 451-458 doi:10.1016/0012-821x(68)90023-x

Hodgson, F.D. and Botha, B.J. (1974). The Doros Complex, South West Africa. Neues Jahrbuch für Mineralogie, Monatshefte, 1974, 398-418.

Siedner, Gerard, Mitchell, John G. (1976) Episodic mesozoic volcanism in Namibia and Brazil: A K-Ar Isochron study bearing on the opening of the south atlantic. Earth and Planetary Science Letters, 30 (2). 292-302 doi:10.1016/0012-821x(76)90256-9

ⓘ 'Fayalite-Forsterite Series'

References:

Hodgson, F.D. and Botha, B.J. (1974). The Doros Complex, South West Africa. Neues Jahrbuch für Mineralogie, Monatshefte, 1974, 398-418.

ⓘ Magnetite

Formula: Fe²⁺Fe³⁺₂O₄

References:

Hodgson, F.D. and Botha, B.J. (1974). The Doros Complex, South West Africa. Neues Jahrbuch für Mineralogie, Monatshefte, 1974, 398-418.

ⓘ Native Copper

Formula: Cu

References:

Hodgson, F.D. and Botha, B.J. (1974). The Doros Complex, South West Africa. Neues Jahrbuch für Mineralogie, Monatshefte, 1974, 398-418.

ⓘ Orthoclase

Formula: K(AlSi₃O₈)

References:

Hodgson, F.D. and Botha, B.J. (1974). The Doros Complex, South West Africa. Neues Jahrbuch für Mineralogie, Monatshefte, 1974, 398-418.

ⓘ 'Plagioclase'

Formula: (Na,Ca)[(Si,Al)AlSi₂]O₈

References:

Hodgson, F.D. and Botha, B.J. (1974). The Doros Complex, South West Africa. Neues Jahrbuch für Mineralogie, Monatshefte, 1974, 398-418.

ⓘ 'Pyroxene Group'

Formula: ADSi₂O₆

References:

Hodgson, F.D. and Botha, B.J. (1974). The Doros Complex, South West Africa. Neues Jahrbuch für Mineralogie, Monatshefte, 1974, 398-418.

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
ⓘ	Native Copper	1.AA.05	Cu
Group 4 - Oxides and Hydroxides
ⓘ	Magnetite	4.BB.05	Fe²⁺Fe³⁺₂O₄
Group 9 - Silicates
ⓘ	Aegirine	9.DA.25	NaFe³⁺Si₂O₆
ⓘ	Orthoclase	9.FA.30	K(AlSi₃O₈)
Unclassified
ⓘ	'Fayalite-Forsterite Series'	-
ⓘ	'Plagioclase'	-	(Na,Ca)[(Si,Al)AlSi₂]O₈
ⓘ	'Pyroxene Group'	-	ADSi₂O₆

List of minerals for each chemical element

O	Oxygen
O	ⓘ Aegirine	NaFe³⁺Si₂O₆
O	ⓘ Magnetite	Fe²⁺Fe₂³⁺O₄
O	ⓘ Orthoclase	K(AlSi₃O₈)
O	ⓘ Fayalite-Forsterite Series
O	ⓘ Plagioclase	(Na,Ca)[(Si,Al)AlSi₂]O₈
O	ⓘ Pyroxene Group	ADSi₂O₆
Na	Sodium
Na	ⓘ Aegirine	NaFe³⁺Si₂O₆
Na	ⓘ Plagioclase	(Na,Ca)[(Si,Al)AlSi₂]O₈
Mg	Magnesium
Mg	ⓘ Fayalite-Forsterite Series
Al	Aluminium
Al	ⓘ Orthoclase	K(AlSi₃O₈)
Al	ⓘ Plagioclase	(Na,Ca)[(Si,Al)AlSi₂]O₈
Si	Silicon
Si	ⓘ Aegirine	NaFe³⁺Si₂O₆
Si	ⓘ Orthoclase	K(AlSi₃O₈)
Si	ⓘ Fayalite-Forsterite Series
Si	ⓘ Plagioclase	(Na,Ca)[(Si,Al)AlSi₂]O₈
Si	ⓘ Pyroxene Group	ADSi₂O₆
K	Potassium
K	ⓘ Orthoclase	K(AlSi₃O₈)
Ca	Calcium
Ca	ⓘ Plagioclase	(Na,Ca)[(Si,Al)AlSi₂]O₈
Fe	Iron
Fe	ⓘ Aegirine	NaFe³⁺Si₂O₆
Fe	ⓘ Magnetite	Fe²⁺Fe₂³⁺O₄
Fe	ⓘ Fayalite-Forsterite Series
Cu	Copper
Cu	ⓘ Native Copper	Cu

Geochronology

Mineralization age: Early/Lower Cretaceous : 130 Ma to 124 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

Phanerozoic

Mesozoic

Cretaceous

Early/Lower Cretaceous

ⓘ Gabbro (youngest age)	124 Ma
ⓘ Gabbro (oldest age)	130 Ma

Other Regions, Features and Areas containing this locality

AfricaContinent

African PlateTectonic Plate

Kaoka BeltOrogenic Belt

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

Hodgson, F.D. and Botha, B.J. (1974). The Doros Complex, South West Africa. Neues Jahrbuch für Mineralogie, Monatshefte, 1974, 398-418.

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.209

OWEN-SMITH, T. M., ASHWAL, L. D. (2015) GEOLOGY OF THE EARLY CRETACEOUS DOROS LAYERED MAFIC INTRUSION, NAMIBIA: COMPLEXITY ON A SMALL SCALE. South African Journal of Geology, 118 (2) 185-211 doi:10.2113/gssajg.118.2.185

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Doros Intrusion, Khorixas, Kunene Region, NamibiaiRegional Level TypesDoros IntrusionIntrusion KhorixasConstituency Kunene RegionRegion NamibiaCountry function showexplain() { $("#locexplain").toggle(); if (typeof movemap === "function") movemap(); }

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

Other Regions, Features and Areas containing this locality

References

Doros Intrusion, Khorixas, Kunene Region, Namibia i
Regional Level Types
Doros Intrusion Intrusion
Khorixas Constituency
Kunene Region Region
Namibia Country