天然气地球化学

华北新元古界下马岭组富有机质层段的地球化学特征及成因初探

展开
  • (1.长江大学地球化学系,湖北 荆州 434023; 2.长江大学油气资源与勘探技术教育部重点实验室,湖北 荆州 434023; 3.石油大学(北京),北京 昌平 102249; 4.中国科学院兰州地质研究所,甘肃 兰州 730000) 
陈践发(1962-),男,湖南耒阳人,研究员,博士生导师,主 要从事石油天然气地质、地球化学和同位素地球化学研究

收稿日期: 2003-12-29

  修回日期: 2004-02-23

  网络出版日期: 2004-04-20

PRELIMINARY STUDY OF GEOCHEMICAL CHARACTERISTICS AND FORMATION OF ORGANIC MATTER RICH STRATIGRAPHY OF XIAMALING  FORMATION OF LATER PROTEROZOIC IN NORTH CHINA

Expand
  • (1. Department of Geochemistry, Yangtze University, Jingzhou 434023 , China;  2.Key Laboratory of Exploration Technologies for Oil and Gas Resource s(Yangtze University),  Ministry of Education, Jingzhou 434023, China; 3. Petrol eum University, Changping 102249, China;   4. Lanzhou Institute of Geology, Chinese Academy of Science, Lanzhou 730000, China)

Received date: 2003-12-29

  Revised date: 2004-02-23

  Online published: 2004-04-20

摘要

华北新元古界青白口系下马岭组是我国华北地区从元古界到下古生界海相沉积有机质相对富集的沉积层段,其有机质含量最高达16%以上。对下马岭组富有机质层段的常量元素、微量元素和有机质含量的系统分析表明:该组富有机质泥质岩的SiO2含量明显高于贫有机质的泥质岩,且SiO2含量与TOC成正相关关系、与TiO2(指示陆源物质加入)的含量成反比关系,Si/(Si+Al+Fe)值与TOC具正相关关系;同时,在富有机质层段中与海底热水流体活动有关的P、Cu、Zn、Co、Ni、V等元素明显富集,Ba/Sr值远远大于1。认为下马岭组富有机质层段沉积时可能存在海底热水活动;海底热水活动一方面可能为生物的繁衍提供了大量的N、P、K、SiO2等营养物质,另一方面可能为生物的繁荣茂盛提供了能量,从而造成海底热水流体活动区沉积层段中有机质明显富集。

本文引用格式

陈践发,孙省利 . 华北新元古界下马岭组富有机质层段的地球化学特征及成因初探[J]. 天然气地球科学, 2004 , 15(2) : 110 -114 . DOI: 10.11764/j.issn.1672-1926.2004.02.110

Abstract

Xiamaling Formation of Qingbaikou System of later Proterozoic in North China is  relatively more abundant in organic matter in marine sedimentary stratigraphies  from Proterozoic to later Paleozoic in North China area. The content of organic  matter is beyond 16% at most. The analyzing result of main elements, trace eleme nts and organic matter content of Xiamaling Formation shows that the content of  SiO2 is apparently higher in organic matter rich mud rock than organic poor mu d rock, the content of SiO2 has a positive correlation with TOC content, and h as a negative correlation with TiO2 content (indicator of land matter input).  The ratio of Si/(Si Al Fe) has a positive correlation with TOC content, too. In  organic matter rich stratigraphy, there is apparently higher element content of  P, Cu, Zn, Co, Ni, V which are related to thermal fluid activity in ocean floor,  and the ratio of Ba/Sr is far more than 1. These characteristics indicate that  during the organic matter rich stratigraphy of Xiamaling Formation was depositin g, there is thermal fluid activity in ocean floor at the same time. The activity  of thermal fluid can provide organism a lot of nutrition, such as N, P, K, SiO2 and so on, it also can provide much energy for organism to grow. As a result , it leads to apparently better accumulation of organic matter in depositional s tratigraphy of  thermal fluid active area in ocean floor.

参考文献

 [1 ]  王杰,陈践发.华北中上元古界烃源岩沉积环境及生烃潜力研究 [J].天然气地球科学,2001,12(3):27-33. 
  [2 ] 曾允孚,夏文杰.沉积岩石学 [M ].北京:地质出版社,1986. 
 [3 ]  孙省利,陈践发,刘文汇,等.热水流体作用与油气的形成 [J ].天然气地球科学,2003,14(3):215-219.  
   [4 ] Tissot B P, Welet D H. Petroleum Formation and Occurrence  [M ]. Belin:Springer-verlag,1984.
  [5 ]  Fyfe W S.Fluids in the Earth's Crust [M ].New York:Elsevier,1978. 
  [6 ]  Von Damm K L, Edmond J M, Grant B. et al. Chemistry of submarin e hydrothermal solution at 21°N,east pacific rise [J ]. Geochimica et Cosmochi mica Acta, 1985,49:2197-2220.
  [7 ]  Von Damm K L, Edmond J M, Measures C I. et al.Chemist ry of submarine hydrothermal solution at Guaymas basin, Gulf of California [J ].  Geochimica et Cosmochimica Acta, 1985,49:2221-2237.
  [8 ]  Marani M P, Gamberi F,  Savelli C. Shallow-water polymet allic sufide deposits in the Aeolian island arc [J ]. Geology,1997,25:815-818. 
  [9 ]  Sedwick P,  Stuben D. Chemistry of shallow submarine warm spring in  an arc-volcanic setting:Vulcano Island, Aeolian Archipelago, Italy [J ]. Marin e Chemistry,1996,53:146-161.
 [10 ]  Pichler T, Veizer J,  Hall G E M. The chemical composition of shallow-w ater hydrothermal fluids in Tutum Bay, Ambitle Island, Papua New Guinea and thei r effect on ambient sea water [J ]. Marine Chemistry,1999,64:229-252.
 [11 ]  周永章,刘建明,陈多福.华南古海洋热水沉积作用研究概述及若干认识 [J ].矿物岩石地球化学通报,2000,19(2):114-118.
 [12 ]  徐跃通.浙江西裘晚元古代层状硅质岩热水沉积地球化学标志及其环境意义[J ]. 地球化学,1996,25(6):600-608.
 [13 ]  Rangin C, Steinberg M, Bonnot-Courtois C. Geochemistry of Mesozoic bedd ed cherts of central Baja California(Vizoaino-Cedros-San Benito): Implication s for paleogeogrphic reconstruction of an old oceanic basin [J ]. Eart h Planet  Sci. Lett., 1981,54:313-322.
 [14 ]  Aitchison J C,Flood P G S. Geochemical constraints on the depositional s etting of palaeozoic cherts from the New England Orogen, NSW, eastern Australia[J ]. Marine Geology,1990,94:79-95.
 [15 ]  葛朝华,韩发.广东大宝山矿床喷气——沉积成因地质地球化学特征 [A ].  北京: 北京科学技术出版社,198726-29.
 [16 ]  孙省利,高兆奎,魏晓辉,等.西成铅锌成矿带泥盆系硅质岩地质地球化学特征与 热水沉积成矿[J ].西北地质,2000,33(2):1-7.
 [17 ]  Adachi M, Yamamoto K, Suigiaki R. Hydrothermal chert and associated sili ceous rocks from the northern pacific:Their geological significance as indicatio n of ocean ridge activity [J ],Sedimentary Geology,1986,47(1/2):125-148.
 [18 ]  Marchig V,Gundlach H,Moller P. et al.Some geochemical indicators for  discrimination between diagenetic and hydrothermal metalliferous sediments [J ] .Marine Geology,1982,50(3):241-156.

文章导航

/