caa a22 4500 445300922 CHVBK 20180317142557.0 cr unu---uuuuu 170323e20100501xx s 000 0 eng 10.1007/s11430-010-0063-6 doi (NATIONALLICENCE)springer-10.1007/s11430-010-0063-6 SHRIMP U-Pb dating and Hf isotopic analyses of Middle Ordovician meta-cumulate gabbro in central Qiangtang, northern Tibetan Plateau [Elektronische Daten] [QingGuo Zhai, Jun Wang, Cai Li, Li Su] Metabasites consisting of metamorphic ultra-mafic rocks, cumulate gabbro, gabbro (diabase), basalt, and plagiogranite are exposed at the Taoxinghu area in central Qiangtang, northern Tibetan Plateau. Zircon SHRIMP U-Pb dating for the cumulate gabbro yields a weighted mean age of 467±4 Ma, which is the oldest and most reliable magmatic age in this area. Zircon 176Hf/177Hf ratios range from 0.282615 to 0.282657, with ε Hf(t) values of 5.02±0.28, indicating that the cumulate gabbro was mainly derived from the depleted mantle. In addition, geochemical data of metabasites suggest that they have similar characteristics to those in the mid-ocean ridge basalts (MORB). The Taoxinghu metabasites may represent the fragment of Early Paleozoic ophiolite in the "Central Uplift” of the Qiangtang, northern Tibetan Plateau. Science China Press and Springer-Verlag Berlin Heidelberg, 2010 Qiangtang nationallicence cumulate gabbro nationallicence SHRIMP dating nationallicence Hf isotope nationallicence Zhai QingGuo Institute of Geology, Chinese Academy of Geological Sciences, 100037, Beijing, China aut Wang Jun Institute of Geology, Chinese Academy of Geological Sciences, 100037, Beijing, China aut Li Cai College of Earth Sciences, Jilin University, 130061, Changchun, China aut Su Li The Geological Laboratory Center and State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences, 100083, Beijing, China aut Science China Earth Sciences SP Science China Press 53/5(2010-05-01), 657-664 1674-7313 53:5<657 2010 53 11430 https://doi.org/10.1007/s11430-010-0063-6 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11430-010-0063-6 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Zhai QingGuo Institute of Geology, Chinese Academy of Geological Sciences, 100037, Beijing, China aut NATIONALLICENCE 700 1- Wang Jun Institute of Geology, Chinese Academy of Geological Sciences, 100037, Beijing, China aut NATIONALLICENCE 700 1- Li Cai College of Earth Sciences, Jilin University, 130061, Changchun, China aut NATIONALLICENCE 700 1- Su Li The Geological Laboratory Center and State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences, 100083, Beijing, China aut NATIONALLICENCE 773 0- Science China Earth Sciences SP Science China Press 53/5(2010-05-01), 657-664 1674-7313 53:5<657 2010 53 11430 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer