期刊
JOURNAL OF STRUCTURAL GEOLOGY
卷 33, 期 4, 页码 500-518出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.jsg.2011.01.005
关键词
Quartz; Petrofabric; EBSD; Proterozoic; Cambrian; Iberian Ranges; Spain
资金
- Spanish Ministerio de Ciencia e Innovacion (Grupo Consolidado) [CGL2008-01130/BTE]
- Universidad del Pais Vasco [GIU09/61]
We describe a new method for the reorientation of lattice preferred orientation data in the absence of a pre-constrained kinematic reference frame. The method enables us to present conventional quartz fabric diagrams after measurements taken from rock sections with a general orientation with respect to foliation and lineation. A microstructural and Electron Back-Scattered Diffraction (EBSD) study of quartz pebbles in early Cambrian conglomerates following this method permit us to recognize a variety of fabrics that resulted from syn-metamorphic ductile deformation under variable temperatures up to 650 degrees C. The likely source area of the conglomerates was a Proterozoic basement. Candidates for source rock correlations include Neoproterozoic units similar to those outcropping in the northern Iberian Massif, Neoproterozoic medium- to high-grade metamorphic rocks as those outcropping in SW Iberia, or a Neoarchean to Mesoproterozoic concealed basement. (C) 2011 Elsevier Ltd. All rights reserved.
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