Tectono-thermal evolution of middle-south section of the Da Hinggan Mountains |
| |
| Authors: | Ji’an Shao Lüqiao Zhang Baolei Mu |
| |
| Institution: | (1) Institute of Sciences & Technologies, Peking University, 100871 Beijing, China;(2) Inner Mongolia Institute of Geology, 010020 Huhehot, China;(3) Department of Geology, Peking University, 100871 Beijing, China |
| |
| Abstract: | The tectonic settings of the different stages of the magmatic activity in the middle-south section of the Da Hinggan Mts.
are analyzed through measuring the isotopic ages of the Mesozoic volcano-plutonic rocks from this area, and thus the tectono-magmatic
evolution series are consequently determined as the initial mantle upwelling marked by the Late Triassic invasion of basic-ultrabasic
rocks containing mantle-source enclaves, middle-upper crust extension marked by intrusion of the Early-Middle Jurassic diobase
dike swarms, dramatic ruption of the Late Jurassic trachitic volcanic rocks, the Early Cretaceous nonorogenic alkalic-subalkalic
granite invasion and the formation of the basic dike swarms and basalts. It is thus inferred that the uprise of the Da Hinggan
Mts. in the Mesozoic is closely reiated to the upwelling of the deep magma in the mantle upwarping settings.
Project supported by the National Natural Science Foundation of China (Grant No. 249472143). |
| |
| Keywords: | tectono-thermal evolution series volcano-plutonic rocks mantle upwelling |
| 本文献已被 SpringerLink 等数据库收录！ |
|
