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The Geochemical Characteristics of Houmachang Granitoid in Suixi, China, and Its Significance
Author(s) -
WU Weiping,
CAI Yang,
CHENG Fang,
DONG Xiaoping
Publication year - 2014
Publication title -
acta geologica sinica ‐ english edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.444
H-Index - 61
eISSN - 1755-6724
pISSN - 1000-9515
DOI - 10.1111/1755-6724.12385_42
Subject(s) - library science , china , chinese academy of sciences , citation , geology , archaeology , geography , computer science
northern Anhui Province, China. It could be divided into two groups, i.e. diorite and granodiorite, respectively. Compared with the granodiorite, diorite has higher concentrations of FeOT, TiO2, MgO, CaO and P2O5 and lower Na2O and K2O contents. The Houmachang granitoid is enriched in Cr, Ni, large ion lithophile elements (Rb, Sr and Ba) and light rare earth elements (REE), and depleted in P, Ti and high field strength elements (Nb, Ta and Y). With the lower chondrite standard values of Yb and concentration of Y, the granitoid has the characteristics of adakite. The high Mg and Cr, Ni contents of Houmachang granitoid indicate the feature of mantle-derived magma. However, the enrichment of Sr, Ba and LREE suggests that the granitoid might be derived from the crustal melts. Combined with the other adakite in Xuzhou-Huaibei area, Houmachang granitoid might be derived from the partial melting of the delaminated continental lower crust, with the contamination of the mantle melt. This magmatism was in response to the subduction of Yangtze Craton beneath the North China Craton.