文章摘要
黄薇,朱增伍,王喆,李长春,谢青,许婷.陕西铜川地区延长组张家滩页岩有机地球化学特征[J].矿产勘查,2019,(4):761-767
陕西铜川地区延长组张家滩页岩有机地球化学特征
Organic geochemical characteristics and geological significance of Zhangjiatan shale in Yanchang formation, Tongchuan area
投稿时间:2018-07-02  
DOI:
中文关键词: 铜川地区  延长组  张家滩页岩  有机地球化学特征  生烃潜力
英文关键词: Tongchuan area, Yanchang formation  Zhangjiatan shale, Organic geochemical characteristics, Hydrocarbon generation potential
基金项目:陕西省公益性地质项目(编号:20150301)资助。
作者单位
黄薇 陕西省矿产地质调查中心,西安 710068
陕西省地质调查院,西安 710054 
朱增伍 陕西省矿产地质调查中心,西安 710068 
王喆 陕西省矿产地质调查中心,西安 710068 
李长春 陕西省矿产地质调查中心,西安 710068 
谢青 陕西省矿产地质调查中心,西安 710068
陕西省地质调查院,西安 710054 
许婷 陕西省矿产地质调查中心,西安 710068
陕西省地质调查院,西安 710054 
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中文摘要:
      铜川地区延长组发育张家滩页岩,分布范围广、厚度大且稳定,是区内油页岩矿的主要赋存层位。应用有机岩石学和分子地球化学的方法,分析铜川地区张家滩页岩的有机地球化学特征参数,探讨张家滩页岩有机地球化学特征及其地质意义。结果表明,张家滩页岩有机质丰度高,有机质类型好,以II2型腐泥腐殖型为主,是形成于半深湖—深湖相还原环境的富有机质沉积,热演化程度普遍进入成熟阶段,有机质主要来源于自生生产的低等水生浮游植物和藻类,其次还有陆源高等植物的输入。铜川地区延长组张家滩页岩具有较强的生烃潜力,是寻找油页岩矿的有利层位。
英文摘要:
      Zhangjiatan shale in Yanchang formation, Tongchuan area, is widely distributed with large and stable thickness. It is the main occurrence layer of oil shale in the area. By means of organic petrology and molecular geochemistry, the organic geochemical characteristics of Zhangjiatan shale in Tongchuan area are analyzed, and the organic geochemical characteristics and geological significance of the Zhangjiatan shale are discussed. The results show that the Zhangjiatan shale has high organic matter abundance, good organic matter type and II2 type sapropel-humic type, which is a rich organic deposit formed in the reduction environment of semi-deep lacustrine facies. The thermal evolution degree is generally at the mature stage, and the organic matter mainly comes from the low aquatic phytoplankton and algae which are produced by their own production. Secondly, the organic matter comes from the input of terrigenous higher plants. Zhangjiatan shale of Yanchang formation in Tongchuan area has strong hydrocarbon generation potential and is favorable for finding oil shale in this area.
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