Manchuria - Ergun good pimple jaundice group of regional metamorphism and deformation of metamorphic rocks

Title: Manchuria - Ergun good pimple jaundice group of regional metamorphism and deformation of metamorphic rocks
　　Author: Ding Xue
　　Degree-granting units: Jilin University
　　Keywords: good pimple jaundice group;; quality of rocks;; mass deformation;; Island in - Ergun
　　Summary:
　　In this paper, Manchuria - Ergun good pimple jaundice group of regional metamorphic rocks of the geological features and output location for a detailed investigation, a systematic study of the best pimple jaundice group composed of metamorphic rocks, Strong magnets petrology, geochemistry characteristics, the formation of the 1990s, rock characteristics and tectonic setting of recovery, to discuss the best pimple jaundice group metamorphic rocks of the magma - metamorphic - the evolution of tectonic deformation sequence and its tectonic significance. Good pimple jaundice group study area metamorphic rocks of the rock types are garnet cross black mica schist, biotite-hornblende schist, biotite-plagioclase amphibolite, granodiorite gneiss and mylonite, two-mica quartz schist and fine-grained biotite granite. Garnet-biotite schist which cross as deputy metamorphic, magmatic source material formed at 361.0 ± 4.7Ma.
　　Biotite-hornblende schist, biotite-plagioclase amphibolite, granodiorite gneiss and mylonite, two-mica quartz schist is metamorphic rocks are, respectively, 360.0 ~ 320.0Ma, 300.0Ma, 211.0 ~ 148.0 Ma, magmatic and metamorphic deformation of the product. Major regional metamorphism took place two and a ductile deformation, the first phase of metamorphism of argillaceous sedimentary rocks of intermediate regional metamorphism, the equivalent of the p / T phase system in the low amphibolite facies; second metamorphic foliation for the large-scale physical and chemical and film, and there are intermediate mafic transformation of regional metamorphism; ductile deformation of late phase of deformation, the formation of local strong deformation zone, showing a strong piece of rock physics and chemistry, and Mi mylonite of the measured two mica Ar-Ar ages of 130.9 ± 1.4Ma, 115.6 ± 1.6Ma. Geochemical results show that the granodiorite mylonite and two-mica quartz schist LREE enrichment, heavy REE loss, there was a certain degree of negative Eu anomaly, REE distribution characteristics of both type granites and crustal melting characteristics similar; granodioritic gneiss REE distribution curve for the light rare earth fractionation evident in the rare earth fractionation obvious, no negative Eu anomaly, with the formation of granite granite of the REE distribution characteristics. http://www.chinamagnets.biz/Neodymium/Ball-Neodymium-Magnets.php Granodioritic gneiss, mylonite and two-mica quartz schist trace element distribution curve, the overall trend showed a right-wing, all losses Sr, P and Ti elements, enriched Rb, Th, Nd and other elements, reflecting the continent arc-orogenic granite background trace element characteristics. In summary, the study area is not the oldest rocks of Precambrian metamorphic basement is exposed, but the Hercynian, Yanshanian orogeny formed orogenic granite belonging to the construction of the continental margin hyperplasia, so-called "good pimple jaundice Group metamorphic rocks, "the rock formations just after the Late Devonian sedimentary strata of a volcanic material, and after the multi-phase granite, transformed by the product of metamorphism and deformation.
　　Degree Year: 2010