Pb-isotope systematics as a guide to crustal involvement in the generation of the Coastal batholith, Peru.

S.B. Mukasa; G.R. Tilton

Pb-isotope systematics as a guide to crustal involvement in the generation of the Coastal batholith, Peru.

S.B. Mukasa, G.R. Tilton

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Abstract

Pb-isotope data for feldspar separates are plotted on Pb-Pb diagrams and compared with potential source regions for the magmas. All fall above the MORB field and suggest an enriched mantle source similar to that reported for Quaternary ores and igneous rocks in central Chile. Samples from the Arequipa segment show a marked displacement towards low 206Pb/204Pb values reflecting contamination by Precambrian crustal rocks. This is not the case in the Lima segment where the most evolved rocks are contaminated by more radiogenic Pb.-R.J.P.

Original language	English (US)
Pages (from-to)	235-238
Number of pages	4
Journal	Magmatism at a Plate Edge: the Peruvian Andes
State	Published - 1985

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Cited By :5

Export Date: 3 November 2016

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title = "Pb-isotope systematics as a guide to crustal involvement in the generation of the Coastal batholith, Peru.",

abstract = "Pb-isotope data for feldspar separates are plotted on Pb-Pb diagrams and compared with potential source regions for the magmas. All fall above the MORB field and suggest an enriched mantle source similar to that reported for Quaternary ores and igneous rocks in central Chile. Samples from the Arequipa segment show a marked displacement towards low 206Pb/204Pb values reflecting contamination by Precambrian crustal rocks. This is not the case in the Lima segment where the most evolved rocks are contaminated by more radiogenic Pb.-R.J.P.",

author = "S.B. Mukasa and G.R. Tilton",

note = "Cited By :5 Export Date: 3 November 2016",

year = "1985",

language = "English (US)",

pages = "235--238",

journal = "Magmatism at a Plate Edge: the Peruvian Andes",

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T1 - Pb-isotope systematics as a guide to crustal involvement in the generation of the Coastal batholith, Peru.

AU - Mukasa, S.B.

AU - Tilton, G.R.

N1 - Cited By :5 Export Date: 3 November 2016

PY - 1985

Y1 - 1985

N2 - Pb-isotope data for feldspar separates are plotted on Pb-Pb diagrams and compared with potential source regions for the magmas. All fall above the MORB field and suggest an enriched mantle source similar to that reported for Quaternary ores and igneous rocks in central Chile. Samples from the Arequipa segment show a marked displacement towards low 206Pb/204Pb values reflecting contamination by Precambrian crustal rocks. This is not the case in the Lima segment where the most evolved rocks are contaminated by more radiogenic Pb.-R.J.P.

AB - Pb-isotope data for feldspar separates are plotted on Pb-Pb diagrams and compared with potential source regions for the magmas. All fall above the MORB field and suggest an enriched mantle source similar to that reported for Quaternary ores and igneous rocks in central Chile. Samples from the Arequipa segment show a marked displacement towards low 206Pb/204Pb values reflecting contamination by Precambrian crustal rocks. This is not the case in the Lima segment where the most evolved rocks are contaminated by more radiogenic Pb.-R.J.P.

M3 - Article

SP - 235

EP - 238

JO - Magmatism at a Plate Edge: the Peruvian Andes

JF - Magmatism at a Plate Edge: the Peruvian Andes

ER -

Pb-isotope systematics as a guide to crustal involvement in the generation of the Coastal batholith, Peru.

Abstract

Bibliographical note

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