Magma mixing origin of the mafic microgranular enclaves from the Yabulai pluton in the western part of northern Alxa Block
Author:
Affiliation:

Clc Number:

Fund Project:

  • Article
  • |
  • Figures
  • |
  • Metrics
  • |
  • Reference
  • |
  • Related
  • |
  • Cited by
  • |
  • Materials
  • |
  • Comments
    Abstract:

    Located in the western part of Yabulai—Nuorigong—Honggueryulin belts,Northern Alxa Block,the Yabulai area possesses extensively exposed intermediate—felsic plutons.The main rock types of the Yabulai pluton are granodiorite and monzogranite,mafic microgranular enclave(MMEs) are widely distributed in the pluton. Zircon UPb dating indicates that the Yabulai pluton were formed in the Early Permian,as evidenced by the data from monzogranite(283.4±2.0Ma),granodiorite(277±1.6Ma),the MMEs(284.7±2.4Ma).The MMEs display igneoustexture and most of them are characterized by plastic flow deformation, quenched margin, inversional veins and acicular apatite can be found in some MMEs. The disequilibrium mineral associations or disequilibrium textures are developed in MMEs.The MMEs has similar REE pattern and primitive mantlenormalized traceelement with host granodiorite and monzogranite, there are linear arrays in binary diagrams, exhibits evidence for magma mixing. Combined with previous studies,the authors hold that the Permian magmatism probably formed a magmatic rock belt along the whole northern margin of Alxa Block,and the Permian igneous rocks in the Western Yabulai Mountain might have been formed in an active continental margin setting related to the southward subduction of the PaleoAsian Ocean.

    Reference
    Related
    Cited by
Get Citation

WANG Kailei, ZHANG Jiaxing, ZHANG Xuemeng, LI Huikai, ZHENG Le, NI Suoyang, LI Jinghua, SUN Wanlin, WANG Qi.2020. Magma mixing origin of the mafic microgranular enclaves from the Yabulai pluton in the western part of northern Alxa Block[J]. Geological Review,66(1):13-33.

Copy
Share
Article Metrics
  • Abstract:
  • PDF:
  • HTML:
  • Cited by:
History
  • Received:September 09,2018
  • Revised:November 08,2019
  • Adopted:
  • Online: January 16,2020
  • Published: