四川盆地下中三叠统异常水点水化学特征及探盐找钾预测研究  

Study on the Hydrochemical Characteristics of Exceptional Water Sites and Estimation of Potassium Salts in the Lower-Middle Trias Series of Sichuan Basin

作　　者：林耀庭[1] 何金权 

机构地区：[1]西南石油局第二地质大队,四川成都611844 [2]西南石油局地质综合研究院流体矿产研究所,四川自贡643013

出　　处：《盐湖研究》2004年第4期1-8,共8页Journal of Salt Lake Research

摘　　要：四川盆地下中三叠统盐卤分布广泛,是四川探盐找钾的重要时代。通过区域地质背景条件分析,其盐类保存、水动力条件和水化学特征在不同水文地质区表现不一,反映在储层的水型也极不一致,按水中阴、阳离子优势组分异常水点分为SO4-Ca、SO4-Na和Cl-Na3种类型。利用异常水点离子的比例系数在海水浓缩曲线图上的落点位置,判别水点成因类型,从而发现盆地东北部宣汉、盆地西部平落和盆地东部万县向斜周边背斜水点具含钾溶滤水特征,值得重视和进一步开展找钾探索。In the lower-middle Trias series of Sichuan Basin, salt bitterns are widely distributed,rendering the series to be a significant age for the exploring of potassium salts. According to the　analyses of background circumstances of the areal geology, the salt storages, hydrodynamics and　hydrochemical characteristics are different in different hydrogeological areas, resulting in varioustypes of water storages. In terms of the dominant components of anionic and cationic ions, the　exceptional waters can be classified as SO_4-Ca, SO_4-Na and Cl-Na types. By locating the ionic ratios　of the exceptional water sites on the concentration curves of sea water, and distinguishing of the　formation mechanisms, it has been found out that the waters of the northeast Xnanhan, west Pingluo　and the synclinal and peripherally anticlinal water sites of east Wan County bear the characteristics of　potassium lixiviation brine, where more focuses should be placed for the further exploration of potassium.

关 键 词：中三叠统 水化学特征 异常 四川盆地 溶滤 区域地质 水动力条件 预测研究 分异 西部 

分 类 号：P618[天文地球—矿床学] P641[天文地球—地质学]