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柴达木盆地自中生代末—新生代以来,由于喜玛拉雅山运动影响,西部形成了众多北西—南东向分布的一系列断裂和褶皱构造单元。这种多断裂带、多褶皱的构造背景,不仅有利于深部水的运移和外围山系风化产物进一步聚集,而且为柴达木盆地盐类资源的储存提供了丰富的空间和场所,富集了广厚的岩盐和深部富钾卤水。在对柴达木盆地西部地表蒸发岩和卤水进行野外实地考察的过程中,在典型的背斜构造区采集和分析了9件油田卤水水样,通过离子含量和一些特征离子比值的分析,发现柴达木盆地西部油田卤水具有高矿化度,高的Na+、Cl-含量和相对更高的Ca2+,低Mg2-、SO42-含量特征;并且盆地西部油田卤水普遍具有较高的K+、Br-、B3+、Sr2+、Li+等离子含量,Br、B3+、Sr2+、Li+等的含量也基本达到了综合利用工业品位和单独开采工业品位,具有潜在的资源意义。
Since the end of the Mesozoic-Cenozoic in the Qaidam Basin, due to the influence of the Himalayas, a large number of faults and folds have been formed in the western part of NW China. The multi-fault zone and multifold tectonic setting not only facilitate the migration of deep water and the accumulation of weathering products in the peripheral mountains, but also provide abundant space and place for the storage of salt resources in the Qaidam Basin, enriching Thick rock salt and deep potassium-rich brine. In the field investigation of surface evaporation rocks and brine in western Qaidam Basin, nine samples of brine in oilfields were collected and analyzed in a typical anticline zone. Based on the analysis of ion content and some characteristic ion ratios, it was found that Brine in the western Qaidam Basin has high salinity, high Na + and Cl- content and relatively higher Ca2 +, Mg2- and SO42- content characteristics. Brines in the western part of the basin generally have higher K + and Br- , B3 +, Sr2 +, Li + plasma content, Br, B3 +, Sr2 +, Li +, etc. have basically reached the comprehensive utilization of industrial grade and mining of industrial grade alone, with potential resource significance.