Age and origin of the Tanghu Granite, southeast China: Results from U-Pb single zircon and Nd isotopes

Research Article| May 01, 1989 Age and origin of the Tanghu Granite, southeast China: Results from U-Pb single zircon and Nd isotopes Li Xianhua; Li Xianhua 1U.S. Geological Survey, M.S. 963, Box 25046, Federal Center, Denver, Colorado 80225 Search for other works by this author on: GSW Google Scholar M. Tatsumoto; M. Tatsumoto 1U.S. Geological Survey, M.S. 963, Box 25046, Federal Center, Denver, Colorado 80225 Search for other works by this author on: GSW Google Scholar W. R. Premo; W. R. Premo 1U.S. Geological Survey, M.S. 963, Box 25046, Federal Center, Denver, Colorado 80225 Search for other works by this author on: GSW Google Scholar Gui Xuntang Gui Xuntang 2Institute of Geochemistry, Academia Sinica, Guiyang, China Search for other works by this author on: GSW Google Scholar Geology (1989) 17 (5): 395–399. https://doi.org/10.1130/0091-7613(1989)017<0395:AAOOTT>2.3.CO;2 Article history first online: 02 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Twitter LinkedIn Tools Icon Tools Get Permissions Search Site Citation Li Xianhua, M. Tatsumoto, W. R. Premo, Gui Xuntang; Age and origin of the Tanghu Granite, southeast China: Results from U-Pb single zircon and Nd isotopes. Geology 1989;; 17 (5): 395–399. doi: https://doi.org/10.1130/0091-7613(1989)017<0395:AAOOTT>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 U-Pb single-zircon and Sm-Nd whole-rock isotopic data for the Tanghu Granite of the Zhuguangshan batholith suggest that a basement either composed of or derived from Middle Proterozoic to Late Archean rocks underlies southeast China The granite contains two kinds of inherited zircon components, whole anhedral zircons and small cores within younger magmatic zircons. The U-Pb data for a single analysis of four magmatic zircons yielded a concordant age of 433 ±2 Ma, whereas single zircons yielded two linear arrays with lower intercepts of 435 ±1 and 434 ±14 Ma and upper intercepts of 1415 ±3 and 2516 ±6 Ma, respectively. Xenocrystic zircons of Archean age had not previously been recognized in any rocks from southeast China Two whole-rock samples from the granite yielded ϵNd values of -7.1 and -8.3 at 434 Ma and Nd model ages of ∼1750 Ma relative to a depleted mantle. We conclude from this isotope data that the Tanghu Granite crystallized at 434 ±1.6 Ma (weighted average) and was derived from a source of unknown age, but had an average crustal-residence age of ∼1750 Ma, and was partially composed of a mixture of continental crustal material of at least two ages (∼1400 and ∼2500 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.