Trace Element Characteristics of Ultramafic Xenoliths in Basaltic Rocks from Penghu Islands, Taiwan

  • Yung-Tan Lee
  • Kuen-Jang Lee
  • Ren-Yi Huang
  • Jyh-Yi Shih
  • Hsiao-Ling Yu
  • Yen-Tsui Hu
  • Chih-Cheng Chen
  • Chih-Lun Huang
Part of the Advances in Intelligent and Soft Computing book series (AINSC, volume 133)

Abstract

The trace and rare earth elements of ultramafic xenoliths from Peiliao area and combined with major elements proposed by Yang et al. (1987)[1] in order to understand the origin of these ultramafic xenoliths and the geochemical characteristics of the upper mantle. Spinel lherzolite mainly composed of olivine, orthopyroxene, clinopyroxene and spinel is the major rock type of ultramafic xenoliths found in Peiliao area, Penghu Islands, Taiwan. Based on major elements of ultramafic xenoliths analyzed in the present study (Yang et al., 1987)[1], we suggest that these xenoliths belong to the residual upper mantle after different degrees of partial melting. The ultramafic xenoliths have higher MgO content, but lower Al2O3, TiO2 and Na2O contents than primitive mantle proposed by Sun and McDonough (1989)[2], indicating that they represent residues formed by different degrees of partial melting from the upper mantle. Incompatible elements and LREEs tend to decrease with increasing MgO/ΣFeO ratios which may be related to the partial melting of the mantle source. These correlations mentioned above indicate that the ultramafic xenoliths from Peiliao area represent the residual materials after the primitive mantle had undergone partial melting. The spidergrams and the chondrite-normalized REE patterns reveal that ultramafic xenoliths from Peiliao area are depleted which indicate that the mantle beneath the study area had undergone relatively smaller degree of partial melting.

Keywords

Partial Melting Mantle Plume Incompatible Element Basaltic Rock Primitive Mantle 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag GmbH Berlin Heidelberg 2012

Authors and Affiliations

  • Yung-Tan Lee
    • 1
  • Kuen-Jang Lee
    • 5
  • Ren-Yi Huang
    • 2
  • Jyh-Yi Shih
    • 1
  • Hsiao-Ling Yu
    • 1
  • Yen-Tsui Hu
    • 3
  • Chih-Cheng Chen
    • 4
  • Chih-Lun Huang
    • 6
  1. 1.Department of TourismAletheia UniversityNew Taipei CityTaiwan
  2. 2.Department of Leisure Business ManagementDeLin Institute of TechnologyNew Taipei CityTaiwan
  3. 3.Sinotech Engineering Consultants Inc.TaipeiTaiwan
  4. 4.Department of Physical EducationAletheia UniversityNew Taipei CityTaiwan
  5. 5.Research Center for Environmental Changes, AcademiaSinicaTaiwan
  6. 6.Office of Physical EducationAletheia UniversityNew Taipei CityTaiwan

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