Comparative planetary mineralogy: Pyroxene major- and minor-element chemistry and partitioning of vanadium between pyroxene and melt in planetary basalts

2006 ◽  
Vol 91 (10) ◽  
pp. 1574-1582 ◽  
Author(s):  
J. Karner ◽  
J.J. Papike ◽  
C.K. Shearer
Keyword(s):  
Minor Element ◽  
Element Chemistry

Trace and Minor Element Chemistry of Alkali Feldspars in the Klokken Layered Syenite Series

1985 ◽  
Vol 26 (4) ◽  
pp. 952-970 ◽  
Author(s):  
R. A. MASON ◽  
I. PARSONS ◽  
J. V. P. LONG
Keyword(s):  
Minor Element ◽  
Element Chemistry ◽  
Alkali Feldspars

Minor element chemistry of leucite and pseudoleucite

1965 ◽  
Vol 35 (272) ◽  
pp. 596-603 ◽  
Author(s):  
C. M. B. Henderson
Keyword(s):  
Minor Element ◽  
Element Chemistry ◽  
Leucite Structure ◽  
Alkali Feldspars

SummaryLeucite and pseudoleucite invariably have lower K/Rb ratios and higher K/Sr and K/Ba ratios than the groundmasses of the rocks in which they occur. The distribution of Rb, Sr, and Ba between K-rich minerals (e.g. alkali feldspars) and the liquids from which they crystallize is generally such that Rb is impoverished and Sr and Ba enriched, relative to K, in the crystallizing phase. Leucite shows the opposite relationship and this is attributed to the leucite structure being sensitive to the size and valency of the ions replacing K.

Devonian alkalic basalt dikes of northeastern Newfoundland: evidence of a tensional environment

1978 ◽  
Vol 15 (5) ◽  
pp. 848-853 ◽  
Author(s):  
N. R. Jayasinghe
Keyword(s):  
Minor Element ◽  
Element Chemistry ◽  
Alkalic Basalt ◽  
Alkalic Basalts

A suite of diabase dikes intrudes granites and migmatites in the northeastern Gander Zone of Newfoundland. Rb–Sr dates on granites pre-dating and post-dating the diabases show that the dikes were emplaced in the Devonian. The mineralogy and the major and minor element chemistry of the dikes indicate that they are alkalic basalts that may have been intruded during a period of tension.

Minor element chemistry of hemo-ilmenite and magnetite in cumulate rocks from the Sokndal Region, South Rogaland, Norway

2001 ◽  
Vol 86 (11-12) ◽  
pp. 1469-1476 ◽  
Author(s):  
Peter Robinson ◽  
Peter T. Panish ◽  
Suzanne A. McEnroe
Keyword(s):  
Minor Element ◽  
Element Chemistry

Metamorphosed boninitic basalts, arc tholeiites, and cryptic volcanic stratigraphy from the Elzevir Terrane of the Grenville Province, Calumet mine, Quebec

1992 ◽  
Vol 29 (1) ◽  
pp. 26-34 ◽  
Author(s):  
Patrick J. Williams
Keyword(s):  
Alkaline Earth ◽  
Hanging Wall ◽  
Minor Element ◽  
The Other ◽  
Grenville Province ◽  
Volcanic Stratigraphy ◽  
Element Chemistry ◽  
Discrete Interval ◽  
Peak Metamorphism ◽  
Primary Structures

Amphibolites (hornblende–plagioclase rocks with Tpeak metamorphism = 650–700 °C) are abundant near the old Calumet Zn–Pb–Ag mine and Au prospect 90 km northwest of Ottawa. They lack primary structures and their original petrochemical character is obscured by metamorphism and profound alteration manifested by a variety of phlogopite–biotite-, garnet-, cummingtonite-, gahnite-, clinopyroxene-, carbonate scapolite-, and calcite-bearing assemblages. This alteration has modified the SiO2, alkali, and most alkaline earth distributions. Trace and minor element chemistry demonstrates that the amphibolites are metaigneous and bimodal, with two suites, one derived from differentiated arc tholeiites and the other from relatively undifferentiated rocks having transitional arc basalt – boninite chemistry. The complex rock package enclosing mineralization includes metatholeiites, whereas the boninitic metabasalts occur in a discrete interval in the structural hanging wall of the mineralization. Although these rocks represent a new geochemical assemblage in the Allochthonous Monocyclic Belt (Central Metasedimentary Belt), their implied geotectonic setting is comparable to those previously inferred for several other areas, including that near Montauban, Quebec, where there are very similar styles of mineralization.

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