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    STUDIA GEOLOGIA - Issue no. 1 / 2007  
         
  Article:   ORIGIN OF PETROLEUM IN METALLIFEROUS LOWER CAMBRIAN BLACK SHALES, YANGTZE PLATFORM, SOUTH CHINA: INSIGHT FROM ISOTOPES AND BIOMARKERS.

Authors:  JORGE E. SPANGENBERG, HARTWIG E. FRIMMEL. 		 
       
         
  Abstract:  In this communication we report the results of the first molecular and compound specific isotopic analysis of carbonaceous matter in mineralized Lower Cambrian black shales from the margin of the Yangtze Platform in South China. These black shales are in places strongly enriched in Ni, Mo, V, Co, Cr, Au, U, As, Pb, Zn, Cu, Re, and PGE. Several models have been put forward for explaining such extreme metal enrichment. These include enrichment by diagenetic fluids, hydrothermal exhalation, extraterrestrial impact, synsedimentary enrichment from seawater, and discharge of petroleum into the basin.  
         
     
         
         
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