The Variscan calc-alkalic plutonism of western Corsica: mineralogy and major and trace element geochemistry

Details The Variscan calc-alkalic plutonism of western Corsica: mineralogy and major and trace element geochemistry The Variscan calc-alkalic plutonism of western Corsica: mineralogy and major and trace element geochemistry

Oct 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984pepi...35..145c&link_type=abstract

Physics of the Earth and Planetary Interiors, Volume 35, Issue 1-3, p. 145-178.

Physics

9

Scientific paper

Petrographic and structural observations on the calc-alkalic plutonism of western Corsica revealed the existence of several successively emplaced units associated with large basic bodies. The present mineralogical and geochemical study deals with the genesis, evolution and relationships of these different units. Basic plutonism is represented by three genetically linked types of rock: norites and troctolites with cumulate textures characterized by low REE contents and either no Eu anomaly or a positive Eu anomaly; gabbros with enriched LREE relatively to HREE patterns, probably close to an initial basaltic liquid; and diorites ranging up to charnockites which represent liquids evolved to varying degrees, mainly by fractional crystallization.
Trace element data and studies on the evolution of pyroxene pairs demonstrate the consanguinity of these calc-alkaline basic rocks which are derived from a high alumina basaltic melt.
The various granitoids (granodiorites, monzogranites and leucocratic monzogranites, i.e., adamellites) have distinct evolution trends as shown by the composition of their mafic minerals and by trace element distributions. They cannot be considered as being derivatives of the basic suite and they cannot be related by a common fractionation sequence. Rather, they represent distinctive batches of crustal anatexis. In addition, hybridization phenomena with the basic melt are noticed in granodiorites. The particular problem of the low La/Yb, Eu/Eu* and the high U, Th, Cs leucocratic monzogranites is discussed in detail.
In addition to more conventional trace element diagrams, the simultaneous statistical treatment of all the geochemical data by correspondence factor analysis is shown to be a very use tool in distinguishing between the different units and to classify the elements according to their geochemical properties.

Affiliated with

Also associated with

No associations

Rating

The Variscan calc-alkalic plutonism of western Corsica: mineralogy and major and trace element geochemistry does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with The Variscan calc-alkalic plutonism of western Corsica: mineralogy and major and trace element geochemistry, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The Variscan calc-alkalic plutonism of western Corsica: mineralogy and major and trace element geochemistry will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1229908