Protoliths of enigmatic Archaean gneisses established from zircon inclusion studies＂ Case study of the Caozhuang quartzite, E. Hebei, China

• Published in: Di xue qian yuan. Vol. 5; no. 4; pp. 445 - 455
• Main Authors: Nutman, Allen P., Maciejowski, Ronni, Wan, Yusheng
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.07.2014; GeoQuEST Research Centre, School of Earth&Environmental Sciences, University of Wol ongong, Wol ongong, NSW 2522, Australia%Beijing SHRIMP Center, Institute of Geology, Chinese Academy of Geological Sciences, 26 Baiwanzhuang Road, Beijing 100037, China; Elsevier
• Subjects: Archaean crustal evolution; Caozhuang quartzite; China; Cratons; Eoarchaean rocks; Gneiss; North China Craton; Pegmatite; Quartzite; Rocks; Villages; Zircon; Zircon inclusions; 中国; 原岩; 大肠杆菌; 河北; 片麻岩; 石英岩; 矿物包裹体; 锆石; China, People's Rep., North China Craton; China, People's Rep; Zircon inclusions; North China Craton; Eoarchaean rocks; Archaean crustal evolution; Caozhuang quartzite
• ISSN: 1674-9871
• DOI: 10.1016/j.gsf.2013.10.001

A diverse suite of Archaean gneisses at Huangbaiyu village in the North China Craton, includes rare fuchsite-bearing （Cr-muscovite） siliceous rocks - known as the Caozhuang quartzite. The Caozhuang quartzite is strongly deformed and locally mylonitic, with silica penetration and pegmatite veining common. It contains abundant 3880-3600 Ma and some Palaeoarchaean zircons. Because of its siliceous nature, the presence of fuchsite and its complex zircon age distribution, it has until now been accepted as a （mature） quartzite. However, the Caozhuang quartzite sample studied here is feldspathic. The shape and cathodoluminescence petrography of the Caozhuang quartzite zircons show they resemble those found in immature detrital sedimentary rocks of local provenance or in Eoarchaean polyphase orthog- neisses, and not those in mature quartzites. The Caozhuang quartzite intra-zircon mineral inclusions are dominated by quartz,