scholarly journals Maps showing interpretation, using R-mode factor analysis, of trace-element abundances in heavy-mineral concentrate samples, Delta 1° x 2° Quadrangle, Utah

1994 ◽  
Keyword(s):  
Factor Analysis ◽  
Trace Element ◽  
Heavy Mineral ◽  
Element Abundances

A new locality for primary xenolith-bearing nephelinites in northwestern British Columbia

1985 ◽  
Vol 22 (10) ◽  
pp. 1556-1559 ◽  
Author(s):  
Michael D. Higgins ◽  
John M. Allen
Keyword(s):  
British Columbia ◽  
Trace Element ◽  
Volcanic Belt ◽  
Primary Magma ◽  
Similar Composition ◽  
Element Abundances ◽  
Late Tertiary

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.

26Al, 244Pu, 50Ti, REE, and trace element abundances in hibonite grains from CM and CV meteorites

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

scholarly journals Use of trace element abundances in augite and hornblende to determine the size, connectivity, timing, and evolution of magma batches in a tilted batholith

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

Trace element abundances in rutiles from eclogites and associated garnet mica schists

2002 ◽  
Vol 184 (1-2) ◽  
pp. 97-122 ◽  
Author(s):  
T Zack ◽  
A Kronz ◽  
S.F Foley ◽  
T Rivers
Keyword(s):  
Trace Element ◽  
Element Abundances
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