Quick
Search: 		  
advanced search
 GSW Home   GeoRef Home   My GSW Alerts   Contact GSW   About GSW   Journals List   Help 
  Geological Magazine   Email Content Delivery
JOURNAL HOME HELP CONTACT PUBLISHER SUBSCRIBE ARCHIVE SEARCH TABLE OF CONTENTS
Geological Magazine; November 2005; v. 142; no. 6; p. 723-733; DOI: 10.1017/S0016756805001202
© 2005 Cambridge University Press (CUP)
This Article
Right arrow Figures Only
Right arrow Full Text
Right arrow Full Text (PDF)
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Right arrow Citation Map
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Similar articles in Web of Science
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrow reprints & permissions
Citing Articles
Right arrow Citing Articles via HighWire
Right arrow Citing Articles via Web of Science (8)
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by GUO, Q.-J.
Right arrow Articles by YANG, R.-D.
Right arrow Search for Related Content
GeoRef
Right arrow GeoRef Citation

Carbon and oxygen isotopic composition of Lower to Middle Cambrian sediments at Taijiang, Guizhou Province, China

QING-JUN GUO*,{dagger}, HARALD STRAUSS{ddagger}, CONG-QIANG LIU*, YUAN-LONG ZHAO§, DAO-HUI PI*, PING-QING FU*, LI-JUN ZHU§ and RUI-DONG YANG§

* State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China
{ddagger} Geologisch-Paläontologisches Institut, Westfälische Wilhelms-Universität Münster, Corrensstrasse 24, 48149 Münster, Germany
§ Institute of Resource and Environmental Engineering, Guizhou University of Technology, Guiyang 550002, China

{dagger} Author for correspondence: gqjowen{at}163.com

Secular variations in the carbon isotopic composition of organic and carbonate carbon characterize the Lower to Middle Cambrian transition that is exposed on the Yangtze Platform at Taijiang, Guizhou Province, southern China. {delta}13C values for organic matter range between –33.4 and – 26.5 {per thousand}. The carbon isotopic composition for carbonate carbon fluctuates between –2.7 and +3.1 {per thousand}. A progressive decrease in the isotopic difference ({Delta}{delta}) between these two isotope records reflects a decrease in the proportional contribution of bacterial biomass to the total sedimentary organic matter. In general, the observed changes are interpreted to reflect primary depositional values, notably variations in the burial rates of organic matter. These, in turn, are linked to biological changes across the Lower to Middle Cambrian transition. No distinct shift in the carbon isotopic composition marks the proposed Lower–Middle Cambrian boundary.

Key Words: Lower–Middle Cambrian • carbon and oxygen isotopic composition • sedimentary organic matter • chemostratigraphic correlation • China




This article has been cited by other articles:


Home page
 Geological MagazineHome page
J.-P. LIN, W. I. AUSICH, Y.-L. ZHAO, and J. PENG
Taphonomy, palaeoecological implications, and colouration of Cambrian gogiid echinoderms from Guizhou Province, China
Geological Magazine, January 1, 2008; 145(1): 17 - 36.
[Abstract] [Full Text] [PDF]


JOURNAL HOME HELP CONTACT PUBLISHER SUBSCRIBE ARCHIVE SEARCH TABLE OF CONTENTS
Copyright © 2009 by Cambridge University Press (CUP)