Discussed in this paper are the relationship between the compressive fault zone and mineralization, and the regularities governing the concentration-dispersion of elements in the compressive fault zone based on chemic...Discussed in this paper are the relationship between the compressive fault zone and mineralization, and the regularities governing the concentration-dispersion of elements in the compressive fault zone based on chemically determined data from field and laboratory studies of megascopic structures and tectonite. Horizontal zoning has been recognized in the compressive fault zone, with four distinct zones from the centre outwards. Four groups of chemical components in these four zones are distinguished: the first group --SiO2, FeO, MgO and MnO; the second -- Fe2O3, Na2O and K2O; the third -- CaO and Al2O3 ; and the fourth -- TiO2 and P2O5. Furthermore, various tectono-geochemical processes (including dynamic differentiation or mechanical metamorphic differentiation, dynamically thermal metamorphism,oxidation-reduction, and hydrolysis and dewatering) in the fault zone are also discussed in detail.展开更多
A study on the ductile deformation domain of the brittle fault in the shallow level ofthe crust is a new probe field for the modern structural geology. Taking the southern Jiang-su Province area as an example the orie...A study on the ductile deformation domain of the brittle fault in the shallow level ofthe crust is a new probe field for the modern structural geology. Taking the southern Jiang-su Province area as an example the orientation measurement of quartz crystals, the com-positional texture observation of three pressure sensitive minerals and the rheological param-eter determination of dislocation densities, etc. have been demonstrated and analysed basedon typical samples in the present paper. In addition, their generation mechanisms arealso discussed from the cataclastic rheology, the dynamic differentiation and the simpleshearing, specially, from the Ode strength theory. Finally, a generative relationship betweenthe ductile deformation domain of the brittle fault system, in the regional layer--slip andthe formation of the stratabound ore deposit is shown as well.展开更多
The fault tectonites (also called dynamo-metamorphic rocks) are customarily named as fault rocks abroad. They are not only of significance in the study of faults of various mechanic properties, but also closely relate...The fault tectonites (also called dynamo-metamorphic rocks) are customarily named as fault rocks abroad. They are not only of significance in the study of faults of various mechanic properties, but also closely related to various deposits. Some fault rocks are even ores themselves. Early in 1880 Kjerulf proposed the 'cataclastic' texture and in 1885, C. Lapworth gave the name mylonite. But there have been widely different views concerning the classification and nomenclature of fault tectonites. Based on the observation on thin sections of more than 1500 samples展开更多
I. INTRODUCTION Fracture propagation in rocks occurs with deformations of microscopic mechanism, such as ductile deformation, brittle fracture and stress-corrosion crack, etc. The term stress-corrosion cracking was na...I. INTRODUCTION Fracture propagation in rocks occurs with deformations of microscopic mechanism, such as ductile deformation, brittle fracture and stress-corrosion crack, etc. The term stress-corrosion cracking was named by W. H. Bassett in 1918. It is the destruction in rock medium caused by the combined actions of different stresses and corrosive solu-展开更多
文摘Discussed in this paper are the relationship between the compressive fault zone and mineralization, and the regularities governing the concentration-dispersion of elements in the compressive fault zone based on chemically determined data from field and laboratory studies of megascopic structures and tectonite. Horizontal zoning has been recognized in the compressive fault zone, with four distinct zones from the centre outwards. Four groups of chemical components in these four zones are distinguished: the first group --SiO2, FeO, MgO and MnO; the second -- Fe2O3, Na2O and K2O; the third -- CaO and Al2O3 ; and the fourth -- TiO2 and P2O5. Furthermore, various tectono-geochemical processes (including dynamic differentiation or mechanical metamorphic differentiation, dynamically thermal metamorphism,oxidation-reduction, and hydrolysis and dewatering) in the fault zone are also discussed in detail.
基金Project supported by the National Natural Science Foundation of China.
文摘A study on the ductile deformation domain of the brittle fault in the shallow level ofthe crust is a new probe field for the modern structural geology. Taking the southern Jiang-su Province area as an example the orientation measurement of quartz crystals, the com-positional texture observation of three pressure sensitive minerals and the rheological param-eter determination of dislocation densities, etc. have been demonstrated and analysed basedon typical samples in the present paper. In addition, their generation mechanisms arealso discussed from the cataclastic rheology, the dynamic differentiation and the simpleshearing, specially, from the Ode strength theory. Finally, a generative relationship betweenthe ductile deformation domain of the brittle fault system, in the regional layer--slip andthe formation of the stratabound ore deposit is shown as well.
文摘The fault tectonites (also called dynamo-metamorphic rocks) are customarily named as fault rocks abroad. They are not only of significance in the study of faults of various mechanic properties, but also closely related to various deposits. Some fault rocks are even ores themselves. Early in 1880 Kjerulf proposed the 'cataclastic' texture and in 1885, C. Lapworth gave the name mylonite. But there have been widely different views concerning the classification and nomenclature of fault tectonites. Based on the observation on thin sections of more than 1500 samples
文摘I. INTRODUCTION Fracture propagation in rocks occurs with deformations of microscopic mechanism, such as ductile deformation, brittle fracture and stress-corrosion crack, etc. The term stress-corrosion cracking was named by W. H. Bassett in 1918. It is the destruction in rock medium caused by the combined actions of different stresses and corrosive solu-
