Episodic trace element and isotopic variations in historical Mauna Loa Lavas: Implications for magma and plume dynamics

1995 ◽  
pp. 263-288 ◽  
Author(s):  
J. M. Rhodes ◽  
S. R. Hart
Keyword(s):  
Trace Element ◽  
Mauna Loa ◽  
Plume Dynamics ◽  
Isotopic Variations ◽  
Episodic Trace

Assimilation and crystallization in basic magma chambers: trace-element and Nd-isotopic variations in the Kerns sill, Nipissing diabase province, Ontario

1989 ◽  
Vol 26 (4) ◽  
pp. 737-754 ◽  
Author(s):  
Peter C. Lightfoot ◽  
Anthony J. Naldrett
Keyword(s):  
Trace Element ◽  
Incompatible Element ◽  
Basaltic Magma ◽  
Basic Magma ◽  
Magma Chambers ◽  
Degree Of Contamination ◽  
Incompatible Elements ◽  
Laboratory Investigations ◽  
Isotopic Variations ◽  
Isotopic Effects

An investigation has been made of the trace-element and Nd-isotopic effects of assimilation at the roof of the Proterozoic Kerns sill in the 2.2 Ga Nipissing diabase province in Ontario. The ratios Th/Zr, La/Zr, and U/Zr and the concentrations of incompatible elements all tend to increase with decreasing Mg#, Ni, and Cr. These variations have been simulated by computer models in which assimilation and fractionation are coupled (AFC) and the most fractionated magmas (identified by low Mg#, Ni, and Cr and by high incompatible-element concentrations) are also the most contaminated (indicated by higher Th/Zr, La/Zr, and U/Zr and lower 143Nd/144Ndo). The results suggest that the ratio (r) of the change of magma mass due to assimilation relative to the change due to fractionation gradually increased. The latent heat of crystallization may have contributed sufficient heat to melt the roof of the intrusion where ponded crustal melts were separated from the underlying basic magma by a double-diffusive interface. Field relations suggest that this interface was progressively destroyed by convective erosion; thus the degree of contamination increased as the magma became more fractionated. These results are consistent with laboratory investigations designed to simulate assimilation at the roof of basaltic magma chambers.

Trace element abundances of high-MgO glasses from Kilauea, Mauna Loa and Haleakala volcanoes, Hawaii

1998 ◽  
Vol 131 (1) ◽  
pp. 13-21 ◽  
Author(s):  
T. P. Wagner ◽  
D. A. Clague ◽  
E. H. Hauri ◽  
T. L. Grove
Keyword(s):  
Trace Element ◽  
Element Abundances ◽  
Mauna Loa

Trace element and isotopic variations in Kerguelen and Heard Island basalts

1988 ◽  
Vol 70 (1-2) ◽  
pp. 57
Author(s):  
M. Storey ◽  
A.D. Saunders ◽  
J. Tarney ◽  
M.J. Norry ◽  
G.F. Marriner ◽  
...  
Keyword(s):  
Trace Element ◽  
Heard Island ◽  
Isotopic Variations

Atmospheric aerosol trace element chemistry at Mauna Loa Observatory: 1. 1979–1985

1995 ◽  
Vol 100 (D12) ◽  
pp. 25979 ◽  
Author(s):  
Jonathan J. Zieman ◽  
Jennifer L. Holmes ◽  
Denise Connor ◽  
Charlene R. Jensen ◽  
William H. Zoller ◽  
...  
Keyword(s):  
Trace Element ◽  
Atmospheric Aerosol ◽  
Mauna Loa ◽  
Trace Element Chemistry ◽  
Element Chemistry
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