Application of 55 multi-dimensional tectonomagmatic discrimination diagrams to Precambrian belts


Por: Verma S.P., Verma S.K., Oliveira E.P.

Publicada: 10 sep 2015
Categoría: Geology

Resumen:
Fifty-five new multi-dimensional diagrams, mostly based on log-ratio transformations, were used to decipher tectonic settings for 17 cases of Precambrian belts in Canada, the USA, Poland, Finland, Jordan, Democratic Republic of CongoandZambia, China, and India. The results of different sets of diagrams for basic-ultrabasic, intermediate, and acid magmas were generally internally consistent. Possible reasons for some inconsistencies may be related to the use of a sample group of mixed ages because of their uncertainties, extreme element mobility caused by metamorphism especially of high-grade type, analytical data quality, different petrogenetic processes for basic to acid magmas such as mantle versus crustal origin, and some deficiencies that still exist in the multi-dimensional diagrams. To partly overcome the last problem, one new multi-dimensional diagram is proposed and used to discriminate mid-ocean ridge and oceanic plateau settings.

Filiaciones:
Verma S.P.:
 Univ Nacl Autonoma Mexico, Inst Energias Renovables, Dept Sistemas Energet, Temixco, Mexico

Verma S.K.:
 Department of Geology and Natural Resources, Institute of Geosciences, University of Campinas - UNICAMP, Campinas, Brazil

Oliveira E.P.:
 Department of Geology and Natural Resources, Institute of Geosciences, University of Campinas - UNICAMP, Campinas, Brazil
ISSN: 00206814
Editorial
Taylor and Francis Inc., 8640 GUILFORD RD, STE 200, COLUMBIA, MD 21046 USA, Estados Unidos America
Tipo de documento: Review
Volumen: 57 Número: 11-12
Páginas: 1365-1388
WOS Id: 000354781100003