The Characteristics Of Neo-archean Metamorphic Intrusive Rock In Dalaohudian Inner Mongolia

Dalaohudian in Inner Mongolia autonomous region is very important to Guyang region and even to the whole Inner Mongolia autonomous region as an important metallogenic belt.Many metal minerals have been found in this area closely linked with the metamorphic intrusive rocks.The researches to occurrence and distribution of he neo-archean metamorphic intrusive rock in Dalaohudian is significance for the mineral survey in the later period.The neo-archean metamorphic intrusive rock in Dalaohudian subject to the improvement of metamorphism in the very long geological time,but the metamorphism is mostly deformation event,The metamorphism is in a low degree,and basically retained the characteristics of the intrusive rock.The neo-archean metamorphic intrusive rock is a calcium-alkali series of the greenschist facies.It has the characteristics of TTG rock series of archean.Based on predecessors’ isotopic dates,the neo-archean metamorphic intrusive rock of Dalaohudian area is classified to Neo-archean.In the north of the study area distributes a greenstone belt,in which Sertengshan Gr.is the most significance part.With the former metamorphic intrusive rocks formed a part of granite-greenstone belt.That granite-greenstone belt is proved to has a closely relationship with many metal mineral found in this area,especially for gold and iron.The external characteristic and deformation degree of the neo-archean metamorphic intrusive rock of Dalaohudian has a highly similarity with the metamorphic intrusive rocks in granite-greenstone belt from the north of the study area.The structural evolution is strongly in this research area at the neo-archean era,lead to strongly magmatic activities,formed a wide range of intrusive rocks.The intrusive rocks intrude into Wulashan Gr and xinhe Gr and made them destroyed.This article by the researches of petrology and lithogeochemistry characteristics to reveal the source material and the structural environment.And through the comparison to uncover the relationship between the metamorphic intrusive rocks of different areas.At the end analyze the metamorphism and the ore-controlling mechanism of the neo-archean metamorphic intrusive rock in Dalaohudian.