Spatial and Temporal Variations of Granitoids in the Altay Orogen and Their Implications for Tectonic Setting and Crustal Growth: Perspectives from Chinese Altay
详细信息
- 责任者：Wang Tao (Institute of Geology ; Chinese Academy of Geological Sciences ; Beijing 100037 ; China) ; Tong Ying
- 刊名：Acta Petrologica et Mineralogica
- 出版年：2010
- 卷期：29(6)
- 关键词：花岗岩 ; granite ; 构造环境 ; tectonic setting ; 地壳生长 ; crustal growth ; 新疆 ; Xinjiang ; 阿尔泰山 ; Altai Mountains ; 中亚 ; Central Asia
- 页码：p.595-618
- 图表：5 illus., 1 table, 115 refs.
- 分类号：0801
- issnNo：ISSN1000-6524
- isbnNo：CN11-1966/P
摘要
This paper has summarized the spatial and temporal evolution of the plutons and discussed their tectonic setting and implications for crustal growth. According to zircon ages available, these plutons can be divided into three periods, namely Early-Middle Paleozoic, Late Paleozoic and Mesozoic. The results demonstrate that central Altay contains widespread old continental basement, whereas southern Altay comprises a significant proportion of juvenile crust, suggesting that the crust grew southward. The horizontal (lateral) and vertical crustal growth contributed ca.18%～28% and 7%～8%, respectively, to the area of Chinese Altay. The authors’ studies also suggest that the Altay orogen preserved original accretional crustal structures during Mesozoic, without large-scale vertical tectonic superposition.