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The Qinlingliang granite massif, Southwestern Shaanxi Province, China was reported as a rapakivi intrusion. However, its mineralogical and petrological study and detailed comparison with the Shachang rapakivi bodies in Miyun County, Beijing show that it obviously contrasts with typical rapakivi in petrographical characteristics, mineralogical assemblages, compositions of feldspar and mafic minerals, and species and contents of accessory minerals. Hence it is argued to be one of the quartz monzonite intrusions common in continental orogenic belts instead of rapakivi. Comprehensive discussions make several problems more clear, namely the Qinlingliang massif formed in a compressional tectonic background instead of an extensional setting; it intruded at the beginning of the full-scale collision between the Yangtze and North China plates other than the post-orogenic stage; the Qinling belt was an Indosinian-Yanshannian continental collision orogen.
The Qinlingliang granite massif, Southwestern Shaanxi Province, China was reported as a rapakivi intrusion. However, its mineralogical and petrological study and detailed comparison with the Shachang rapakivi bodies in Miyun County, Beijing show that it clearly contrasts with typical rapakivi in petrographical characteristics, mineralogical assemblages, compositions of feldspar and mafic minerals, and species and contents of accessory minerals, and it is argued to be one of the quartz monzonite intrusions common in continental orogenic belts instead of rapakivi. Comprehensive discussions make several problems more clear, of the Qinlingliang massif formed in a compressional tectonic background instead of an extensional setting; it intruded at the beginning of the full-scale collision between the Yangtze and North China plates other than the post-orogenic stage; the Qinling belt was an Indosinian-Yanshannian continental collision orogen.