Characteristics and Geological Significances of the Organic Matter in the Wulagen Zn-Pb Deposit, Kashi Sag, Xinjiang
摘要
Wulagen zinc-lead deposit in Xinjiang Province is located in north margin of Kashi sag.Large quantity of organic matter exists in the mining area and the periphery of Wulagen zinc-lead deposit,and the relationship between organic matter and zinc-lead mineralization has attracted the attention.By the organic extraction,family components separation and quantitative,saturated hydrocarbons chromatogram-mass spectrum,the chloroform bitumen "A" and biomarkers were analyzed,and the characteristics of the organic matter and its geological significances and the relationship between organic matter and zinc-lead mineralization were discussed.The chloroform bitumen"A" family components and main eigenvalues of biomarkers in the wall-rocks and the periphery of Wulagen zinc-lead deposit have a similar and smaller variational range(CPI=1.11-1.17;Pr/Ph=0.68-1.08;C27,C28 and C29 sterane has a pattern of C27>C28effect biodegradation obvious,suggesting not saturated baseline chromatography gas phenomenon ?hump? conditions.The salinity high a undergone has gammacerane,indicating amount certain having detected were samples all low(<0.85) ratio Ph Pr deposit.The zinc-lead Wulagen periphery area maturity show αβ-hopane="0.13-0.21)" alkyl (22S+22R)="0.56-0.58;βα-MO" 22S biomarkers(OEP="1.01-1.15;C31αβ-hopane" features shale.The continental from mainly derived origin,and nature same have hopanes="0.36-0.52),indicating" 17α(H)-hopanes="0.55-0.93;C29/C30">
