CAJ | 학술논문

对羌塘盆地孔孔茶卡地区石炭系擦蒙组（C2 c）烃源岩形成的沉积环境进行探讨和研究。擦蒙组的岩石学、沉积相、元素地球化学的综合分析结果表明：该套烃源岩地层发育的沉积相为三角洲相；水解性元素和 Fe 族元素含量较高，表明其水体环境为滨岸-浅海，且古水深较浅；古气候指数 C（C ＝∑（Fe ＋Mn ＋Cr ＋Ni ＋V ＋Co）/∑（Ca ＋Mg ＋Sr ＋Ba ＋K ＋Na））的计算结果均大于0.8，指示出湿润的气候环境；Sr/Ba 比值全部小于1，介于0.13～0.23之间，表明为盐度较低的陆相淡水沉积水体；根据 V /Cr 与 V /Sc、V /（V ＋Ni）、Th/U、Ni /Co 和 Fe2＋/Fe3＋比值的变化，综合判断为富氧水体环境。上述这些条件均有利于繁殖大量的陆地生物和水生生物，这些有机物质通过水体的搬运沉积、富集形成了研究区石炭系一套较好的烃源岩。
대강당분지공공다잡지구석탄계찰몽조（C2 c）경원암형성적침적배경진행탐토화연구。찰몽조적암석학、침적상、원소지구화학적종합분석결과표명：해투경원암지층발육적침적상위삼각주상；수해성원소화 Fe 족원소함량교고，표명기수체배경위빈안-천해，차고수심교천；고기후지수 C（C ＝∑（Fe ＋Mn ＋Cr ＋Ni ＋V ＋Co）/∑（Ca ＋Mg ＋Sr ＋Ba ＋K ＋Na））적계산결과균대우0.8，지시출습윤적기후배경；Sr/Ba 비치전부소우1，개우0.13～0.23지간，표명위염도교저적륙상담수침적수체；근거 V /Cr 여 V /Sc、V /（V ＋Ni）、Th/U、Ni /Co 화 Fe2＋/Fe3＋비치적변화，종합판단위부양수체배경。상술저사조건균유리우번식대량적륙지생물화수생생물，저사유궤물질통과수체적반운침적、부집형성료연구구석탄계일투교호적경원암。
This paper focused on the study of the sedimentary environment about the source rock of Carbonifer-ous Cameng Formation(C2 c)in Qiangtang basin,which characteristics of petrology,sedimentary facies and geo-chemistry were analyzed.The results reveal the following aspects:the sedimentary environment of the source rock in Carboniferous Cameng Formation is the delta deposit;the hydrolysable and ferrum elements are high abundant,indicating an onshore to shallow sea environment with shallow-water depth;the values of paleoclimate indexes (C)are all greater than 0.8,showing a humid environment;the ratios of Sr/Ba are all less than 1 within range of 0.13 to 0.23,indicating a low-salinity and fresh terrestrial sedimentary environment;the rela-tionship of V /Sc,V /(V +Ni),Th /U,Ni /Co,Fe2 +/Fe3 + with V /Cr all manifest an oxygen-enriched water environment.The above conditions are all favorable to mass propagation of terrestrial organisms and aquatic organisms,and these organic matters are transported and deposit,providing the materials of the source rock in the study area.