Age and tectonic setting of Late Archean greenstone-gneiss terrain in Henan Province, China, as revealed by single-grain zircon dating

Research Article| March 01, 1988 Age and tectonic setting of Late Archean greenstone-gneiss terrain in Henan Province, China, as revealed by single-grain zircon dating Alfred Kröner; Alfred Kröner 1Department of Geosciences, University of Mainz, P.O. Box 3980, 6500 Mainz, Federal Republic of Germany Search for other works by this author on: GSW Google Scholar William Compston; William Compston 2Research School of Earth Sciences, Australian National University, G.P.O. Box 4, Canberra ACT 2601, Australia Search for other works by this author on: GSW Google Scholar Zhang Guo-wei; Zhang Guo-wei 3Department of Geology, Northwestern University, Xian, China Search for other works by this author on: GSW Google Scholar Guo An-lin; Guo An-lin 3Department of Geology, Northwestern University, Xian, China Search for other works by this author on: GSW Google Scholar Wolfgang Todt Wolfgang Todt 4Max—Planck—Institut für Chemie. P.O. Box 3060, 6500 Mainz, Federal Republic of Germany Search for other works by this author on: GSW Google Scholar Geology (1988) 16 (3): 211–215. https://doi.org/10.1130/0091-7613(1988)0162.3.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 Alfred Kröner, William Compston, Zhang Guo-wei, Guo An-lin, Wolfgang Todt; Age and tectonic setting of Late Archean greenstone-gneiss terrain in Henan Province, China, as revealed by single-grain zircon dating. Geology 1988;; 16 (3): 211–215. doi: https://doi.org/10.1130/0091-7613(1988)0162.3.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 We report precise U-Pb zircon ages for single grains of a metarhyodacite from the Late Archean Dengfeng greenstone belt in Henan Province, China, near the southern margin of the North China craton. Most grains belong to an igneous population whose U-Pb isotopic systematics define a straight line intersecting concordia at 2512 ±12Ma, and this is interpreted as the time of crystallization of the original greenstone volcanics. Several grains are distinctly older, between 2576 ±9 and 2945 ±44 Ma, and we interpret the older grains as xenocrysts of pre-greenstone continental crust that provide evidence for crustal derivation or crustal contamination of the original rhyodacitic lava. The xenocrysts suggest evolution of the Dengfeng greenstone belt in a continental environment that may be represented by the Taihua high-grade gneisses bordering the Dengfeng greenstones and for which we obtained ages of 2806 ±7 and 2841 ±6 Ma. Our data add evidence to the now widely held concept that most Archean greenstones developed on or near older continental crust and were therefore prone to crustal contamination. In such cases, conventional zircon dating may not always record the precise age of rock formation. 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.