Aspects of the magmatic geochemistry of bismuth

Details Aspects of the magmatic geochemistry of bismuth Aspects of the magmatic geochemistry of bismuth

Feb 1973

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1973gecoa..37..283g&link_type=abstract

Geochimica et Cosmochimica Acta, vol. 37, Issue 2, pp.283-295

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Scientific paper

Bismuth has been determined in 74 rocks from a differentiated tholeiitic dolerite, two calc-alkaline batholith suites and in 66 mineral separates from one of the batholiths. Average bismuth contents, weighted for rock type, of the Great Lake (Tasmania) dolerite, the Southern California batholith and the Idaho batholith are, 32, 50 and 70 ppb respectively. All three bodies demonstrate an enrichment of bismuth in residual magmas with magmatic differentiation. Bismuth is greatly enriched (relative to the host rock) in the calcium-rich accessory minerals, apatite and sphene, but other mineral analyses show that a Bi-Ca association is of little significance to the magmatic geochemistry of bismuth. Most of the bismuth, in the Southern California batholith at least, occurs in a trace mineral phase (possibly sulfides) present as inclusions in the rock-forming minerals.

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