• 责任者：Su Wenbo (School of the Earth Sciences and Resources ; China University of Geosciences ; Beijing 100083 ; China) ; Wang Yongbiao
• 刊名：Journal of China University of Geosciences
• 出版年：2008
• 卷期：19(5)
• 关键词：primary productivity ; black shale ; TOC ; habitat type (HT) ; Ordovician–Silurian transition ; South China
• 页码：p.534–548
• 图表：4 illus., 3 tables, 60 refs.
• issnNo：ISSN1002-0705
• isbnNo：CN42-1279/P

 New   total   organic   carbon   (TOC)   data  from   the   two   Ordovician–Silurian   transitional graptolite-bearing   black   shale   intervals,   the   Wufeng Formation   and   the   Longmaxi Formation     in  Central  Guizhou and   West  Hubei,    respectively,  as  well  as  previously reported TOC data from the same intervals in other places on the Yangtze platform of South China, have   been   used   to   produce   an   initial   estimate   of   the   primary   paleoproductivity   via   a conventional inverse   method   (i.e.,  Rpp-inverse).   The   values   of   the  Rpp-inverse  are   estimated   to   be   32   (43–21)   gC/(m²·a) (Wufeng    Formation)    and  21  (27–16)  gC/(m²·a) (Longmaxi Formation).   The   difference   in   the   results   via   the   two methods suggests that paleoproductivity estimates from the geological strata need to be made cautiously, with    particular   attention   paid   to  the  paleogeographic      setting,  oxic-anoxic   conditions,    as  also  the preservation factor of organic carbon.