Gross brukkaros, a probable carbonatite volcano in the nama plateau of southwest africa

A. J A Janse

doi:10.1130/0016-7606(1969)80[573:GBAPCV]2.0.CO;2

Gross brukkaros, a probable carbonatite volcano in the nama plateau of southwest africa

A. J A Janse^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

23 Citations (Scopus)

Abstract

The large ring-shaped Mt. Brukkaros is formed by a dome of lower Paleozoic Nama sediments. In the center of the dome a depression 1.5miles in diameter is underlain and surrounded by fine-grained, layered, clastic rocks (microbreccias) derived from brecciation of the Nama sediments and shales. In the surrounding country rocks, 45 satellite vents and numerous radial dikes occur; they are filled with coarse breccias in a carbonate-rich matrix. This structure is the result of phreatic eruptions of a volatile-rich alkaline ultrabasic intrusion meeting water-soaked sediments. The Brukkaros complex is interpreted as a carbonatite volcano in an incipient stage.

Original language	English
Pages (from-to)	573-586
Number of pages	14
Journal	Bulletin of the Geological Society of America
Volume	80
Issue number	4
DOIs	https://doi.org/10.1130/0016-7606(1969)80[573:GBAPCV]2.0.CO;2
Publication status	Published - 1969
Externally published	Yes

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10.1130/0016-7606(1969)80[573:GBAPCV]2.0.CO;2

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title = "Gross brukkaros, a probable carbonatite volcano in the nama plateau of southwest africa",

abstract = "The large ring-shaped Mt. Brukkaros is formed by a dome of lower Paleozoic Nama sediments. In the center of the dome a depression 1.5miles in diameter is underlain and surrounded by fine-grained, layered, clastic rocks (microbreccias) derived from brecciation of the Nama sediments and shales. In the surrounding country rocks, 45 satellite vents and numerous radial dikes occur; they are filled with coarse breccias in a carbonate-rich matrix. This structure is the result of phreatic eruptions of a volatile-rich alkaline ultrabasic intrusion meeting water-soaked sediments. The Brukkaros complex is interpreted as a carbonatite volcano in an incipient stage.",

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doi = "10.1130/0016-7606(1969)80[573:GBAPCV]2.0.CO;2",

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T1 - Gross brukkaros, a probable carbonatite volcano in the nama plateau of southwest africa

AU - Janse, A. J A

PY - 1969

Y1 - 1969

N2 - The large ring-shaped Mt. Brukkaros is formed by a dome of lower Paleozoic Nama sediments. In the center of the dome a depression 1.5miles in diameter is underlain and surrounded by fine-grained, layered, clastic rocks (microbreccias) derived from brecciation of the Nama sediments and shales. In the surrounding country rocks, 45 satellite vents and numerous radial dikes occur; they are filled with coarse breccias in a carbonate-rich matrix. This structure is the result of phreatic eruptions of a volatile-rich alkaline ultrabasic intrusion meeting water-soaked sediments. The Brukkaros complex is interpreted as a carbonatite volcano in an incipient stage.

AB - The large ring-shaped Mt. Brukkaros is formed by a dome of lower Paleozoic Nama sediments. In the center of the dome a depression 1.5miles in diameter is underlain and surrounded by fine-grained, layered, clastic rocks (microbreccias) derived from brecciation of the Nama sediments and shales. In the surrounding country rocks, 45 satellite vents and numerous radial dikes occur; they are filled with coarse breccias in a carbonate-rich matrix. This structure is the result of phreatic eruptions of a volatile-rich alkaline ultrabasic intrusion meeting water-soaked sediments. The Brukkaros complex is interpreted as a carbonatite volcano in an incipient stage.

UR - https://www.scopus.com/pages/publications/0004703222

U2 - 10.1130/0016-7606(1969)80[573:GBAPCV]2.0.CO;2

DO - 10.1130/0016-7606(1969)80[573:GBAPCV]2.0.CO;2

M3 - Article

SN - 0016-7606

VL - 80

SP - 573

EP - 586

JO - Bulletin of the Geological Society of America

JF - Bulletin of the Geological Society of America

IS - 4

ER -

Gross brukkaros, a probable carbonatite volcano in the nama plateau of southwest africa

Abstract

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