ON THE STUDIES OF DUCTILE SHEAR ZONES:THEIR GEOLOGICAL SIGNIFICANCE
Received date: 2004-10-08
Revised date: 2005-03-12
Online published: 2005-07-25
Systematic studies of element migration，activation，sequence by stress，REE distributions and the mineral crystal parameter variations in the ductile shear zones under condition of natural and strong shearing are the frontier of the ductile shear zones as well as the difficult aspects of geochemistry of mylonites at present. The results will be mostly of importance and breakthrough to the dynamic diagenesis and mineralization theoretically and practically. This paper deals with and summarizes the research and importance of ductile shear zones and presents the future direction and aim for the research of the ductile shear zones around the world. Four aspects of studies of the ductile shear zones have been proposed in this paper as follows: (1) The stress environment including the mineral assemblages，deformation，stress-shearing parameters;（2）The major element sequence and activation under condition of stress;（3）The variations of trace elements and REE，their transportation distributions under strong natural deformation as well as variations of mineral crystal parameters，which can also control the element （component）changes during the ductile deformation;（4）The relationship between element migrations，activation and stress，which will present the new evidences for the studies of dynamic diagenesis and mineralization as well as the studies of evolution of ductile shear zones developed in middle and low levels.（5）The analysis of elements and isotopes in mylonites on the micro-scale are crucial for the understanding of component migrations during the mylonization.
YANG Xiao-yong . ON THE STUDIES OF DUCTILE SHEAR ZONES:THEIR GEOLOGICAL SIGNIFICANCE[J]. Advances in Earth Science, 2005 , 20(7) : 765 -771 . DOI: 10.11867/j.issn.1001-8166.2005.07.0765
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