Mixed Caledonian appinite magmas: implications for lamprophyre fractionation and high Ba-Sr granite genesis
Article Abstract:
Elemental/isotopic surveys of mixed Caledonian appinite magmas reveal a high level of interaction between lamprophyric and syenitic magmas that resemble the petrogenesis of high Ba-Sr granitoids. Analysis of the high Ba and Sr, and light REE abundances, along with incompatible element ratios of the derived magmas, shows the possibility of large mantle components representing recent additions to the crust. The magmas prominently exhibit sharp-sided granite veins.
Publication Name: Contributions to Mineralogy and Petrology
Subject: Earth sciences
ISSN: 0010-7999
Year: 1996
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The relationship between E- and N-type magmas in the Baffin Bay lavas
Article Abstract:
The magmatic history of the Baffin Bay lavas is analyzed. The trace element study shows the existence of two stratigraphically-interbedded primary magmas with affinities with N-Mid-Ocean Ridge Basalts (MORB) and E-MORB. Although the two primary magmas are indistinguishable in terms of trace elements and petrography, compositionally different mantle sources are required to explain the two distinct magma types observed in Baffin Bay.
Publication Name: Contributions to Mineralogy and Petrology
Subject: Earth sciences
ISSN: 0010-7999
Year: 1992
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Late Archaean crust-mantle interactions: geochemistry of LREE-enriched mantle derived magmas. Example of the Closepet batholith, southern India
Article Abstract:
A study shows that Closepet batholith, South India, is made up of at least two groups of intrusions. Mixing of two unrelated end-members from different source regions, namely enriched peridotitic mantle and Peninsular Gneisses, could be the cause of continuous variation of the magmatic bodies. The composite Closepet batholith formed due to large-scale mixing between the mantle and crustal melts.
Publication Name: Contributions to Mineralogy and Petrology
Subject: Earth sciences
ISSN: 0010-7999
Year: 1995
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