INITIAL STUDY ON GENESIS OF A BIG NATURAL SULPHUR DEPOSIT IN CHINA BY MEANS OF MOLECULAR ORGANIC GEOCHEMISTRY

Biological marker composition of sulphur-asphalt associated with Chujiazhuang natural sulphur deposit, in Shandong Province was studied in detail by means of GC-MS technique. Two unusual compounds were found, including GX and C33 thiohopane. It is indicated by the peculiarities of biological marker composition of the sulphur-asphalt that the re-concentration of sulphur was related to the reduction of organic matter and activity of bacteria in hypersaline lake sediments during the early stage of diagcncsis. The natural sulphur deposit is considered to be a stratum-bound deposit of diagenetic origin.