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Plume-lithosphere interactions in the generation of the basalts of the Kenya Rift, East Africa.

Research output: Contribution to Journal/Magazine › Journal article › peer-review

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Plume-lithosphere interactions in the generation of the basalts of the Kenya Rift, East Africa. / MacDonald, Raymond; Rogers, N. W.; Fitton, J. G. et al.
In: Journal of Petrology, Vol. 42, No. 5, 05.2001, p. 877-900.

Research output: Contribution to Journal/Magazine › Journal article › peer-review

Harvard

MacDonald, R, Rogers, NW, Fitton, JG, Black, S & Smith, M 2001, 'Plume-lithosphere interactions in the generation of the basalts of the Kenya Rift, East Africa.', Journal of Petrology, vol. 42, no. 5, pp. 877-900. https://doi.org/10.1093/petrology/42.5.877

APA

MacDonald, R., Rogers, N. W., Fitton, J. G., Black, S., & Smith, M. (2001). Plume-lithosphere interactions in the generation of the basalts of the Kenya Rift, East Africa. Journal of Petrology, 42(5), 877-900. https://doi.org/10.1093/petrology/42.5.877

Vancouver

MacDonald R, Rogers NW, Fitton JG, Black S, Smith M. Plume-lithosphere interactions in the generation of the basalts of the Kenya Rift, East Africa. Journal of Petrology. 2001 May;42(5):877-900. doi: 10.1093/petrology/42.5.877

Author

MacDonald, Raymond ; Rogers, N. W. ; Fitton, J. G. et al. / Plume-lithosphere interactions in the generation of the basalts of the Kenya Rift, East Africa. In: Journal of Petrology. 2001 ; Vol. 42, No. 5. pp. 877-900.

Bibtex

@article{a4328a94fb7b4e13b69decd5c4f00d0a,
title = "Plume-lithosphere interactions in the generation of the basalts of the Kenya Rift, East Africa.",
abstract = "Major and trace element and Sr–Nd–Pb isotopic data for mafic volcanic rocks are used to assess the number of mantle plumes contributing to the Tertiary–Holocene magmatism of the Kenya Rift Valley, current estimates of which vary from none to three. Rocks ranging in composition from nephelinite to hypersthene-normative basalt have been sampled from three lithospheric zones: the Tanzanian craton, the craton margin reworked during the late Proterozoic, and the Mozambique mobile belt. The magmas are interpreted as the products of variable degrees of partial melting within the spinel–garnet peridotite transition zone. Trace element and isotopic compositions from all three zones are broadly similar to those of oceanic island basalts, but there is considerable compositional variation, which is related to a strong overprint from the lithosphere on plume-derived melts. Sr and Nd isotopic ratios provide the only clear distinction between magmatic rocks from the three lithospheric domains. Within each setting, mafic magmatism has tended to become less silica undersaturated with time, and at any one locality magmatism has migrated towards the centre of the rift. Magmas may have formed as a result of the infiltration of plume-derived melts into the base of the lithosphere. The extent of interaction of inferred plume melts with the lithosphere has not varied systematically in time or space. The plume component appears to be similar to the source of oceanic island basalts.",
keywords = "Kenya Rift Valley, mantle plumes, geochemistry, metasomatism",
author = "Raymond MacDonald and Rogers, {N. W.} and Fitton, {J. G.} and S. Black and M. Smith",
year = "2001",
month = may,
doi = "10.1093/petrology/42.5.877",
language = "English",
volume = "42",
pages = "877--900",
journal = "Journal of Petrology",
issn = "1460-2415",
publisher = "Oxford University Press",
number = "5",

}

RIS

TY - JOUR

T1 - Plume-lithosphere interactions in the generation of the basalts of the Kenya Rift, East Africa.

AU - MacDonald, Raymond

AU - Rogers, N. W.

AU - Fitton, J. G.

AU - Black, S.

AU - Smith, M.

PY - 2001/5

Y1 - 2001/5

N2 - Major and trace element and Sr–Nd–Pb isotopic data for mafic volcanic rocks are used to assess the number of mantle plumes contributing to the Tertiary–Holocene magmatism of the Kenya Rift Valley, current estimates of which vary from none to three. Rocks ranging in composition from nephelinite to hypersthene-normative basalt have been sampled from three lithospheric zones: the Tanzanian craton, the craton margin reworked during the late Proterozoic, and the Mozambique mobile belt. The magmas are interpreted as the products of variable degrees of partial melting within the spinel–garnet peridotite transition zone. Trace element and isotopic compositions from all three zones are broadly similar to those of oceanic island basalts, but there is considerable compositional variation, which is related to a strong overprint from the lithosphere on plume-derived melts. Sr and Nd isotopic ratios provide the only clear distinction between magmatic rocks from the three lithospheric domains. Within each setting, mafic magmatism has tended to become less silica undersaturated with time, and at any one locality magmatism has migrated towards the centre of the rift. Magmas may have formed as a result of the infiltration of plume-derived melts into the base of the lithosphere. The extent of interaction of inferred plume melts with the lithosphere has not varied systematically in time or space. The plume component appears to be similar to the source of oceanic island basalts.

AB - Major and trace element and Sr–Nd–Pb isotopic data for mafic volcanic rocks are used to assess the number of mantle plumes contributing to the Tertiary–Holocene magmatism of the Kenya Rift Valley, current estimates of which vary from none to three. Rocks ranging in composition from nephelinite to hypersthene-normative basalt have been sampled from three lithospheric zones: the Tanzanian craton, the craton margin reworked during the late Proterozoic, and the Mozambique mobile belt. The magmas are interpreted as the products of variable degrees of partial melting within the spinel–garnet peridotite transition zone. Trace element and isotopic compositions from all three zones are broadly similar to those of oceanic island basalts, but there is considerable compositional variation, which is related to a strong overprint from the lithosphere on plume-derived melts. Sr and Nd isotopic ratios provide the only clear distinction between magmatic rocks from the three lithospheric domains. Within each setting, mafic magmatism has tended to become less silica undersaturated with time, and at any one locality magmatism has migrated towards the centre of the rift. Magmas may have formed as a result of the infiltration of plume-derived melts into the base of the lithosphere. The extent of interaction of inferred plume melts with the lithosphere has not varied systematically in time or space. The plume component appears to be similar to the source of oceanic island basalts.

KW - Kenya Rift Valley

KW - mantle plumes

KW - geochemistry

KW - metasomatism

U2 - 10.1093/petrology/42.5.877

DO - 10.1093/petrology/42.5.877

M3 - Journal article

VL - 42

SP - 877

EP - 900

JO - Journal of Petrology

JF - Journal of Petrology

SN - 1460-2415

IS - 5

ER -