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The Huangling igneous complex in the central Yangtze Block, South China, consists of the 850-Ma tonalite and trondhjemite which were intruded by the 826±13Ma high-K granite. The granites are composed of plagioclase (30–60%), alkali feldspar (10–30%), quartz (20–30%), biotite (<10%) and hornblende (<5%). Both hornblende and biotite have high Ti and low Al contents, indicating high liquidus temperature...
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