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
1985 ◽  
Vol 22 (10) ◽  
pp. 1556-1559 ◽  
Author(s):  
Michael D. Higgins ◽  
John M. Allen

High Ni abundances (420–500 ppm) and Mg* values (100 × Mg/(Mg + Fe2+) = 69–71) and the presence of mantle-derived xenoliths indicate that a subvolcanic nephelinite intrusion in northwestern British Columbia represents an unmodified primary magma. A separate, closely associated nephelinite intrusion shows evidence of minor olivine fractionation from a similar composition. Only three other occurrences of primary nephelinite have been described. This new occurrence suggests that these magmas may not be so rare as previously supposed. The trace-element abundances closely resemble those of primary nephelinites of similar La content from Freemans Cove, Canada. Such compositions are usually taken as evidence of intraplate rifting and doming. Therefore, these rocks are further evidence of late Tertiary or Quaternary rifting in the Stikine volcanic belt.


1987 ◽  
Vol 51 (2) ◽  
pp. 329-350 ◽  
Author(s):  
A.J. Fahey ◽  
J.N. Goswami ◽  
K.D. McKeegan ◽  
E. Zinner

Geosphere ◽  
2013 ◽  
Vol 9 (6) ◽  
pp. 1747-1765 ◽  
Author(s):  
N. Coint ◽  
C. G. Barnes ◽  
A. S. Yoshinobu ◽  
M. A. Barnes ◽  
S. Buck

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