Geochronological and geochemical constraints on the mafic rocks along the Luang Prabang zone Carboniferous back-arc setting in northwest Laos》.pdfVIP

LITHOS-03659; No of Pages 16 Lithos xxx (2015) xxx–xxx Contents lists available at ScienceDirect Lithos jour nal homepage: www.el sevie r. com/ locate/ lithos Geochronological and geochemical constraints on the mafic rocks along the Luang Prabang zone: Carboniferous back-arc setting in northwest Laos Xin Qian a, Qinglai Feng a,⁎, Yuejun Wang b, Chongpan Chonglakmani c, Denchok Monjai c a State Key Laboratory of Geological Processes and Mineral Resources, Faculty of Earth Sciences, China University of Geosciences, Wuhan 430074, China b School of Earth Science and Geological Engineering, Sun Yat-Sen University, Guangzhou 510275, China c School of Geotechnology, Suranaree University of Technology, Nakhon Ratchasima 30000, Thailand a r t i c l e i n f o a b s t r a c t Article history: The key to gaining a better understanding of Paleotethyan tectonic evolution is to determine the tectonic setting Received 20 April 2015 of the main suture/tectonic zones and their relationships in SE Asia. The Luang Prabang tectonic zone in NW Laos Accepted 30 July 2015 lies in the area that aligns with the Jinshajiang–Ailaoshan suture zone to the north and the Nan suture zone to the Available online xxxx south. Correlations among them have been debated. Samples from a diabase dyke and coarse-grained basalt in the Luang Prabang tectonic zone yield zircon U–Pb weighted mean ages of 335.5 ± 3.3 Ma and 304.9 ± Keywords: