Porphyroblast inclusion trails: a new reference frame for correlating orogenic terrains .

  1. Sayab, M.
  2. Aerden, Dominicus G.A.M.
Revista:
Trabajos de geología

ISSN: 0474-9588

Año de publicación: 2010

Número: 30

Páginas: 208-213

Tipo: Artículo

DIALNET GOOGLE SCHOLAR lock_openAcceso abierto editor

Otras publicaciones en: Trabajos de geología

Resumen

Tectonic and metamorphic correlation in ancient (Proterozoic) orogenic terrains has alwaysbeen problematic. This is because of the lack of a suitable reference frame to correlate deformation andmetamorphic events from one orogenic terrain to another. Measurement of porphyroblast inclusiontrails as Foliation Intersection/Inflection Axes (FIA) allows the chronological and kinematic linking ofdeformation as well as metamorphism. FIA measurements in the Mesoproterozoic Mount Isa andGeorgetown inliers of the North Australian Craton have revealed two separate orogenic events (O1 andO2), which not only correlate better within the orogen but also between the two terrains.Microstructural corelations have also been made with the Mesoproterozoic rocks of the SW USA.Hence, porphyroblast inclusion trails as FIA provide a new reference frame to help correlate orogenicterrains.

Referencias bibliográficas

  • ADSHEAD-BELL, N. S. and BELL, T. H. (1999): The progressive development of a macroscopic upright fold pair during five nearorthogonal foliation-producing events: complex microstructures versus a simple macrostructure. Tectonophysics, 306: 121-147.
  • AERDEN, D. G. A. M. (2004): Correlating deformation in Variscan NW-Iberia using porphyroblasts; implications for the Ibero-Armorican Arc. J. Struct. Geol., 26: 177-196.
  • BELL, T. H., FORDE, A. and WANG, J. (1995): A new indicator of movement direction during orogenesis: measurement technique and application to the Alps. Terra Nova, 7: 500-508.
  • BELL, T. H. and HICKEY, K. A. (1998): Multiple deformations with successive subvertical and subhorizontal axial planes in the Mount Isa Region: their impact on geometric development and significance for mineralization and exploration. Econ. Geol., 93: 1369-1389.
  • BLACK, L. P., GREGORY, P., WITHNALL, I. W. and BAIN, J. H. C. (1998): U-Pb zircon age for the Etheridge Group, Georgetown region, north Queensland: implications for relationship with the Broken Hill and Mt Isa sequences. Aust. J. Earth Sci., 45: 925-935.
  • BLAKE, D. H. (1987): Geology of the Mount Isa Inlier and environs, Queensland and Northern Territory. Bureau of Mineral Resources. Geol. Geophys. Bull., 225: 1-83.
  • CIHAN, M. and PARSONS, A. (2005): The use of porphyroblasts to resolve the history of macro-scale structures: An example from the Robertson River Metamorphics, North-Eastern Australia. J. Struct. Geol., 27: 1027-1045.
  • CIHAN, M., EVINS, P., LISOWIEC, N. and BLAKE, K. (2006): Time constraints on deformation and metamorphism from EPMA dating of monazite in the Proterozoic Robertson River Metamorphics, NE Australia. Precambrian Res., 145: 1-23.
  • FLORENCE, F. P., SPEAR, F. S. and KOHN, M. J. (1993): P-T paths from northwestern New Hampshire: metamorphic evidence for stacking in a thrust/nappe complex. Am. J. Sci., 293: 939-979.
  • ILG, B. R. and KARLSTROM, K. E. (2000): Porphyroblast inclusion trail geometries in the Grand Canyon: evidence for non-rotation and rotation? J. Struct. Geol., 22: 231-243.
  • KARLSTROM, K. E., AHALL, KARL-INGE., HARLAN, S. S., WILLIAMS, M. L., MCLELLAND, J. and GEISSMAN, J. W. (2001): Long-lived (1.8-1.0 Ga) convergent orogen in southern Laurentia, its extensions to Australia and Baltica, and implications for refining Rodinia. Precambrian Res., 111: 5-30.
  • KIM, H. S. and BELL, T. H. (2005): Multiple foliations defined by different sillimanite crystal habits, partial metling and the late metamorphic development of the Cannington Ag-Pb-Zn deposit, Northeast Australia. Gondwana Res., 8: 493-510.
  • LI, Z. X., BOGDANOVA, S. V., COLLINS, A. S., DAVIDSON, A., WAELE, B. DE., ERNET, R. E., FITZSIMONS, I. C. W., FUCK, R. A., GLADKOCHUB, D. P., JACOBS, J., KARLSTROM, K. E., LU. S., NATAPOV, L. M., PEASE, V., PISAREVSKY, S. A., THRANE, K. and VERNIKOVSKY, V. (2008): Assembly, configuration, and break-up history of Rodinia: A synthesis. Precambrian Res., 160: 179-210.
  • MARES, V. M. (1998): Structural development of the Soldiers Cap Group in the Eastern Fold Belt of the Mt Isa Inlier: a succession of horizontal and vertical deformation events and large-scale shearing. Aust. J. Earth Sci., 45: 373-387.
  • PAGE, R. W. and SUN, S. S. (1998): Aspects of geochronology and crustal evolution in the Eastern Fold Belt, Mt Isa Inlier. Aust. J. Earth Sci., 45: 343-361.
  • SAYAB, M. (2005): Microstructural evidence for N-S shortening in the Mount Isa Inlier (NW Queensland, Australia): the preservation of early W-E trending foliations in porphyroblasts revealed by independent 3D measurement techniques. J. Struct. Geol., 27: 1445-1468.
  • SAYAB, M. (2008): Correlating multiple deformation events across the Mesoproterozoic NE Australia using foliation intersection axes (FIA) preserved within porphyroblasts. Gondwana Res., 13: 331- 351.
  • WILLIAMS, M. L. and KARLSTROM, K. E. (1996): Looping P-T paths and high-T, low-P middle crustal metamorphism: Proterozoic evolution of the southwestern United States. Geology, 24: 1119-1122.
  • WILLIAMS, M. L. and JERCINOVIC, M. J. (2002): Microprobe monazite geochronology: putting absolute time into microstructural analysis. J. Struct. Geol., 24: 1013-1028.
  • WINGATE, M. T. D., PISAREVSKY, S. A. and EVANS, D. A. D. (2002): Rodinia connections between Australia and Laurentia: no SWEAT, no AUSWUS? Terra Nova, 14: 121-128.
  • WITHNALL, I. W. (1996): Stratigraphy, structure and metamorphism of the Proterozoic Etheridge and Langlovale Groups, Georgetown region, north Queensland. Aust. Geol. Surv. Org. Rec., 15: 1-114.
  • ZEH, A., KLEMD, R., BUHLMANN, S. and BARTON, M. J. (2004): Proand retrograde P-T evolution of granulites of the Beit Bridge Complex (Limpopo Belt, South Africa): constraints from quantitative phase diagrams and geotectonic implications. J. Metamorph. Geol., 22: 79-95.
Fuente de los datos: Dialnet