Premium
Evidence for the Lower Continental Crustal Origin of the Xihuashan Granite
Author(s) -
Yidou Li,
Jifu Sheng,
Le Bel L.,
Giuliani G.
Publication year - 1986
Publication title -
acta geologica sinica‐english
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.444
H-Index - 61
eISSN - 1755-6724
pISSN - 0001-5717
DOI - 10.1111/j.1755-6724.1986.mp60003005.x
Subject(s) - geology , geochemistry , continental crust , mantle (geology) , crust , partial melting
The Xihuashan granite is typically representative of the tungsten‐bearing granites widespread in the Nanling area of South China. It was considered in the past to have been formed by partial melting of the upper continental crust, with its source rocks most probably of the Sinian or Cambrian. However, detailed REE analyses, studies of the Rb‐Sr isotopic system and melting experiments of metasedimentary rocks all argue against this idea. Moreover, stable isotopic data also indicate a deep source origin for S, C, H and O. The authors thus propose a genetic concept of the lower continental crustal source of the Xihuashan granite, and point out further that tungsten deposits related to this kind of granite are linked in some way to deep‐seated structure and concentrated along NNE‐NE‐ and ENE‐striking major deep fault belts above the transitional zone between mantle uplift and mantle depression.