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Liang Y.,Liaoning Institute of Geological Exploration | Guo H.,Liaoning Institute of Geological Exploration | Yu H.,Liaoning Institute of Geological and Mineral Resources
Northwestern Geology | Year: 2016

The Tekes paired metamorphic belt is an important part of the paired metamorphic belt in West Tianshan. Detailed observations and discussions on the characteristics of Tekes paired metamorphic belt are contribute to in-depth studying the paired metamorphic belt in entire west-ern Tianshan. The metamorphic rocks with low-pressure facies series are respected by the rock groups of cordierite schist, but the ones with high-pressure facies series are delegated by the rock groups of glaucophane schist. Under the subsequent compression system, the stratified metamor-phic,rocks with different competent had been superimposed together by continent-continent collision. After experiencing strong displacement of longitudinal structures, the rock groups of glau-cophane schist (including marble) with strong competent had been changed as lenticular, layered rock, which had been embedded in the rock groups of cordierite schist (with weak competent and large quantity), constituting the melange of paired metamorphic belt. The time of metamorphism is about the end of Late Silurian Epoch. The rock groups of cordierite schist were formed by island arc type metamorphism with amphibolite facies in low-pressure facies series, but the ones of glaucophane schist were developed by subduction zone type metamorphism with low greenschist facies in high-pressure facies series. I.

Zhai F.,LIAONING Technical University | Yang Z.,Liangning Bureau of Geological and Mineral Exploration | Pan Y.,Liaoning Institute of Geological Exploration
Advanced Materials Research | Year: 2012

The liaoning province is big province of mineral resources, although some energy and nonmetallic minerals resource reserves have among the top, but the rare earth provide strategic significance of mineral resources is the shortage, and molybdenum resources reserves to reduce year by year. This article through the objective analysis of molybdenum in liaoning province, the rare earth mineral resources exploration, status quo and the existing main problems of rare earth mineral resources, the province of molybdenum and long-term forecast the recent demand, in the province of mineral resources planning, provides the basis. © (2012) Trans Tech Publications, Switzerland.

Zhang Q.-K.,Liaoning Institute of Geological Exploration | Shao X.-F.,Liaoning Institute of Geological Exploration | Guan P.-Y.,Liaoning Institute of Geological Exploration | Yang B.,Liaoning Institute of Geological Exploration | And 3 more authors.
Geology in China | Year: 2014

The studied glaucophane schist is in the Ordovician Halahahe Formation of Subugeta, Inner Mongolia, and there are a variety of rock assemblage types. According to the optical characteristics and EMP analysis, the authors have come to the conclusion that the glaucophane schist is a kind of ferriglaucophane in the study area. The topomineral assemblage of glaucophane schist is characterized by glaucophane + epidote + actinolite + phengite + sphene. The schist was cemented and recrystallized by shaly clasolite, and the formation environment of native rock was the marginal-sea basin of the continent. The metamorphic origin belonged to the regional low-temperature/middle-high pressure dynamic metamorphism related to plate movement.

Guo H.,Liaoning Institute of Geological Exploration | Wang Z.,Liaoning Institute of Geological Exploration | Zhong M.,Liaoning Institute of Geological Exploration | Zhai F.,Liaoning Institute of Geological Exploration | Liang Y.,Liaoning Institute of Geological Exploration
Northwestern Geology | Year: 2016

In this paper, the deformation and metamorphism of Liaohe Group and their relation have been discussed in detail. And then, the metamorphie facies, the distribution and dividing basis of metamorphie belt have been analyzed carefully. Meanwhile, the P-T-t locus characteristic of metamorphism has been investigated initially. The results show that, the metamorphism and deformation of Liaohe Group were happened under the compression system when the volcanic sedimentary series of paleoproterozoic ocean were subducted into the depths of the earth, and both of them belongs to the same thermodynamic process. Now, all existing tectonic phenomena can be considered to the final state of progressive deformation process under the same dynamic action. The Liaohe Group is a layered disorderly metamorphie tectonic unit. Only to instead of the original "Formation" that according to the sequence stratigraphy, the inherent features of Liaohe Group can be shown by using the lithologic mapping.

The paired metamorphic belt of West Tianshan Orogen is more typical in Chahanwusu Area, Xinjiang. According to the difference of metamorphism, this paired metamorphic belt can be divided into several metamorphic facies zone, including sericite-chlorite zone with greeanschistfacies, glaucophane zone with greenschist facies, biotite-hornblende zone with amphibolite facies belt and sillimanite-almandite zone with amphibolite facies. Based on the degree of metamorphism and tectonic deformation, this paired metamorphic belt can be divided into three kinds of structural levels; the brittle structural layer in the upper level, the structural layers in the middle-upper level and the ones in the lower level. After analyzing the superimposed relationship among these structural levels, more than threetimes of tectonic deformation characteristics have been distinguished in the rocks of West Tianshan Orogen. And the corresponding metamorphic minerals for these three tectonic stages in the process of deformation can be observed. And then, the interre-lationship between generated mineral association and deformation has been discussed, the relationship between metamorphism and deformation sequence has been established according on analyzing the produce order of metamorphic mineral, the rocks' textures and tectonic. Finally, it's certain that the relationship between metamorphism and deformation is not a simple one - to - one relationship, but has the characteristics of penetration superposition and circulation.

Yu H.-F.,Liaoning Institute of Geological Exploration | Wang F.-J.,Liaoning Institute of Geological Exploration | Pan M.-C.,Liaoning Institute of Geological Exploration | Liang Y.-W.,Liaoning Institute of Geological Exploration | Guo H.-F.,Liaoning Institute of Geological Exploration
Northwestern Geology | Year: 2011

During early tectonic evolution, Western Tianshan orogenic belt which is located between Kazakhstan Plate and Junggar Plate passes complex geologic evolution as follows; 1 the first event (D1) is recognized from the evolution of Pre-Sinian basement: 2 the D2 event is mainly the stable continental crust development of Sinian to Early Ordovician; 3 the D3 structures and fabrics are plate divergence-fitting of the Middle Ordovician to the end of Carboniferous; 4 the D4 event reveals intercontinental overlaying orogeny of Permian; 5 the final stage of event (D5) largely indicates the basin-range coupling stage of Mesozoic-Cenozoic. The D3 event can be divided into four secondary stages of tectonic evolution, i. e., the D31 stage in the formation of the South Tianshan oceanic basin of the Middle Ordovician to late Silurian, the D32 stage in the subduction-orogeny of the late Silurian to late Devonian, the D33 stage in the intercontinental collision-orogeny of the late Silurian to early Carboniferous, and the D34 stage in the postcollision of the early Carboniferous to late Carboniferous. Western Tianshan orogenic belt becomes a magnificent compound orogenic belt in the central Asia which passes subduction-orogeny, interacontinental collision-orogeny, interacontinental overlaying-orogeny, interacontinental orogenic cycle and so on, Since Meso-Neoproterozoic.

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