...A.Yu. Selyatitskii; O.P. Polyansky; R.A. Shelepaev Abstract —Thermal metamorphism produced an aureole near the early Paleozoic Bayan-Kol gabbro–monzodiorite intrusion in the Erzin shear zone of western Sangilen (Tuva–Mongolia microcontinent, Central Asian Orogenic Belt). Field observation...

... in a low-pressure region within the Erzin shear zone at a middle crust depth level. Interaction of contrasting magmas is comprised of two stages. The first stage occurs during the transport of a contrast mixture and comes down to intensive mechanical mixing and the introduction of LIL and HFS elements...

...–Chinchilig (Mugur) and Erzin–Naryn (Nizhnii Erzin) tectonic blocks composed mostly of rocks of the Mugur (Moren) and Nizhnii Erzin metamorphic complexes. The blocks join each other along the Erzin shear zone ( Fig. 1 ), which is a penetrating area of mylonitization and ductile-plastic flow of rocks...

... in the type of mantle source from suprasubductional in the Cambrian to enriched deeper-level one in the Ordovician. Mafic magmatism is usually associated with the activity of subduction, spreading, or hot spot (plume) zones, where the mafic magmas penetrating the crust are upper mantle melts reacting...

... settings from syncollisional compression to postcollisional extension. Being widely distributed in the Erzin tectonic zone, mingling dikes could serve as the brightest and the most informative event indicator ( Karmysheva et al., 2015 ; Vladimirov et al., 2017 ). As part of the study, gabbro-granite...

... show all evidence of intrusive nature and usually form groups of proximal subvertical plate-like or bent bodies up to several hundred meters in length and 0.5 to 25.0 m in thickness. They are localized in steeply dipping shear fractures in the enclosing rocks near linear fault zones. Locally, e.g...

... surfaces of stripping (decollement), and near-vertical zones (Riedel shear)). Strike-slip dislocations and related decollements were magma-controlling structures for sills of the Tannu-Ola diorite-quartz-diorite-granodiorite complex (451±15 Ma) and younger dike belts and vein series of the Chzhargalant...

... regional shear zone as evidence of the Vendian accretionary–collision events at the western margin of the Siberian craton . Dokl. Earth Sci. 450 ( 1 ), 489 – 493 . Liu , Y. , Gao , S. , Hu , Z. , Gao , C. , Zong , K. , Wang , D...

...: indicators of petrogenetic conditions in shear zones of the Olkhon area , in: Proc. Conf., Irkutsk, 18–21 October 2011, Geodynamic Evolution of Lithosphere in the Central Asian Orogenic Belt (from Ocean to Continent) [in Russian] . IZK, Irkutsk , Issue 9 , pp. 124 – 126...

.... Figure 11. (A) Distribution of major fault patterns near the Cyprus-Arabia-Anatolia triple junction overlain on upper-mantle shear-wave velocity (70 km below surface). Faults in red correspond to the main and northern strands of the East Anatolian fault zone. Faults in orange include the Dead Sea fault...

... ), and subalkalic gabbro ( Vladimirov et al., 1999 ). Thus, these rocks are distributed over the entire Caledonide area. As a rule, they have common geochemical features. It was observed in such rocks from the Agardag–Erzin zone that the increase in the contents of incompatible elements in the gabbro–monzonite...

... , metabasites and volcanosedimentary rocks of the Agardag shear zone; 3 , schists and gneisses of the Mugur–Teskhem complex; 4 , marking horizons of amphibolites and metavolcanics of the Mugur–Teskhem complex; 5 , granites; 6 , diorites; 7 , gabbro; 8 , ultrabasites of the Agardag ophiolite complex; 9...

... N. N. (1970) . Some characteristic features of the Anatolian Fault zone , Tectonophysics 9 , 143 - 165 . Aydin A. Nur A. (1982) . Evolution of pull...

...) correlated this extension with the activity of the North Anatolian transform. In Greece, the transform can no longer be found as a strike-slip fault zone. Dewey & Sengor (1979) argued that the predominately NW-striking, normal faulting there may be the expression of a right-lateral shear zone, called here...

...) 490±4, metamorphites of amphibolite facies, Daribin zone 494±1, granulites, Erzin complex, Sangilen 490±4, metaschists, Narym complex 485±2, blueschists, Uimon zone 483±9, the same 485±5, metaschists, Ol’khon zone 445±10, mylonites, Ol’khon zone Borodina et al., 2004 Volkova et al., 2005...

... Nd model ages than sediments of the Burd Gol mélange, suggesting an origin from distinct sources. About 1.5 km north of the Cambrian pluton, there is a 15-m-wide zone of sheared marble with a northwest-southeast-striking foliation steeply dipping northeast. The S-C fabrics, the asymmetric...

... the Yanshan-Himalayan orogeny, resulting in folding and shearing of the ore lenses. The deposit is made up of three mineralized zones: a sheet-like upper massive sulfide zone with exhalite (barite, chert, and jasper), a middle stringer-stockwork strata-bound zone hosted in rhyolitic volcanic rocks...

..., whereas carbonate-facies varieties contain siderite or ankerite as major constituents. The mineralogy of silicate-facies iron formations is more complex and depends to a large extent on the degree of postdepositional metamorphism. Under relatively low grade metamorphic conditions, at the biotite zone...