Pb isotopes of granitoids suggest Devonian accretion of Yangtze (South China) craton to North China craton

Research Article| November 01, 1997 Pb isotopes of granitoids suggest Devonian accretion of Yangtze (South China) craton to North China craton Hong-Fei Zhang; Hong-Fei Zhang 1Department of Geochemistry, China University of Geosciences, Wuhan 430074, People's Republic of China Search for other works by this author on: GSW Google Scholar Shan Gao; Shan Gao 1Department of Geochemistry, China University of Geosciences, Wuhan 430074, People's Republic of China Search for other works by this author on: GSW Google Scholar Ben-Ren Zhang; Ben-Ren Zhang 1Department of Geochemistry, China University of Geosciences, Wuhan 430074, People's Republic of China Search for other works by this author on: GSW Google Scholar Ting-Chuan Luo; Ting-Chuan Luo 1Department of Geochemistry, China University of Geosciences, Wuhan 430074, People's Republic of China Search for other works by this author on: GSW Google Scholar Wen-Li Lin Wen-Li Lin 1Department of Geochemistry, China University of Geosciences, Wuhan 430074, People's Republic of China Search for other works by this author on: GSW Google Scholar Author and Article Information Hong-Fei Zhang 1Department of Geochemistry, China University of Geosciences, Wuhan 430074, People's Republic of China Shan Gao 1Department of Geochemistry, China University of Geosciences, Wuhan 430074, People's Republic of China Ben-Ren Zhang 1Department of Geochemistry, China University of Geosciences, Wuhan 430074, People's Republic of China Ting-Chuan Luo 1Department of Geochemistry, China University of Geosciences, Wuhan 430074, People's Republic of China Wen-Li Lin 1Department of Geochemistry, China University of Geosciences, Wuhan 430074, People's Republic of China Publisher: Geological Society of America First Online: 02 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (1997) 25 (11): 1015–1018. https://doi.org/10.1130/0091-7613(1997)025<1015:PIOGSD>2.3.CO;2 Article history First Online: 02 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Hong-Fei Zhang, Shan Gao, Ben-Ren Zhang, Ting-Chuan Luo, Wen-Li Lin; Pb isotopes of granitoids suggest Devonian accretion of Yangtze (South China) craton to North China craton. Geology 1997;; 25 (11): 1015–1018. doi: https://doi.org/10.1130/0091-7613(1997)025<1015:PIOGSD>2.3.CO;2 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGeology Search Advanced Search Abstract Feldspar separates of 30 granitoid intrusions ranging in age from Neoproterozoic to Mesozoic were analyzed for Pb isotopic compositions, together with associated Precambrian basement whole rocks from the North and South Qinling orogenic belts. The two belts constitute the southern active margin of the North China craton and the northern passive margin of the Yangtze craton, respectively. Proterozoic basement rocks from the North and South Qinling belts are clearly distinguished in terms of both present-day Pb isotopes and calculated initials at the time of granite magmatism, with the former having considerably more radiogenic Pb. Granitoids of the South Qinling belt, irrespective of age and specific granitoid rock type, show a fairly homogeneous Pb isotopic composition that is similar to that of the South Qinling basement. In contrast, in the North Qinling belt the Pb isotopic composition of granitoids is correlated with their age: Neoproterozoic and early Paleozoic granitoids have radiogenic Pb isotopic compositions like those of the North Qinling Proterozoic basement rocks, but late Paleozoic and Mesozoic granitoids show significantly less radiogenic Pb isotopic compositions, similar to those of the South Qinling basement rocks. The unusual change is interpreted to reflect underthrusting of the South Qinling belt beneath the North Qinling belt at ca. 360 Ma. The process resulted in a change of the source for younger North Qinling granitoids from the radiogenic North Qinling to the less radiogenic South Qinling basement rocks. Thus, the Yangtze craton accreted to the North China craton no later than 360 Ma. This content is PDF only. Please click on the PDF icon to access. First Page Preview Close Modal You do not have access to this content, please speak to your institutional administrator if you feel you should have access.