Chronological Characteristics and Geological Significance of Paleoproterozoic Magnetite-Bearing Pegmatite Dykes in the Wula Mountains of the North China Craton
In the North China craton northern margin tectonic activities are frequent,especially from the Archean to the Indochinese period,accompanied by the multiple activities of the pre-mountain fault,the formation of multiple stages of magmatic intrusion or dike.Taking the magnetite-bearing pegmatites in the Ula Mountains area of Inner Mongolia as the research object,this paper accurately determined the formation age of magnetite-bearing pegmatites as(1 817±18)Ma by LA-ICP-MS Zircon U-Pb dating technology,which is the product of deep melting in the Kunzi rock system under the background of the collision between the Paleoproterozoic Ordos land mass and the Yin Mountain land massif,and its formation and evolution are closely related to the"Lüliang movement",representing the cracking event of 1.85-1.7 Ga in the northern margin of the North China craton.
万方数据
维普
