Effects of volcanic activities in Ordovician Wufeng-Silurian Longmaxi period on organic-rich shale in the Upper Yangtze area, South China

Lanyu WU,Yongchao LU,Shu JIANG,Xiaofeng LIU,Guisong HE

</td> </tr> <tr> <td style="text-align: center;color:#fff;" bgcolor="#00c2de"><strong>Fig. 1.</strong> <b>Isochroonal stratigraphic framework and lithofacies correlation within the Wufeng Formation- Member 1 of the Longmaxi Formation in the Upper Yangtze area (Graptolite biozonation after Chen et al. <sup>[<xref ref-type="bibr" rid="b5">5</xref>]</sup>; the isotopic ages represent the lower boundary age, and the original data are from Gradstein et al.<sup>[<xref ref-type="bibr" rid="b6">6</xref>]</sup>; the base of the Hirnantian is considered equivalent to the base of the WF4 (445.16 Ma); the top of the Hirnantian corresponds to the base of LM2 (443.83 Ma).</b><br/></td> </tr> <tr> <td height="5" bgcolor="#fff"></td> </tr> <tr> <td style="text-align: center;" bgcolor="#fff"> <img src="../1876-3804-45-5-862/img_1.png" onload="javascript:DrawImage(this,'800','600');" /> </td> </tr> <tr> <td height="5" bgcolor="#fff"></td> </tr> <tr> <td height="30"></td> </tr> </table> </BODY> <script type="text/javascript" src="http://cdn.mathjax.org/mathjax/latest/MathJax.js?config=TeX-AMS-MML_HTMLorMML"></script> <script type="text/x-mathjax-config"> MathJax.Hub.Config({ extensions: ["tex2jax.js"], jax: ["input/TeX", "output/HTML-CSS"], tex2jax: {inlineMath: [ ['$','$'], ["\$","\$"] ],displayMath: [ ['$$','$$'], ["\\[","\\]"] ],processEscapes: true}, "HTML-CSS": { availableFonts: ["TeX"] }, TeX: {equationNumbers: {autoNumber: ["none"], useLabelIds: true}}, "HTML-CSS": {linebreaks: {automatic: true}}, SVG: {linebreaks: {automatic: true}} }); </script> </html>