氦气是一种重要的战略稀缺资源, 通常与天然气伴生. 中国目前仅发现塔里木盆地和田河气田一例特大型富氦气田. 本文报道了鄂尔多斯盆地东胜气田新的实例, 该气田为首例致密砂岩型特大富氦气田. 鄂尔多斯盆地东胜气田92个天然气样品中氦气相对含量数据统计分析表明, 该气田天然气中氦气平均含量为0.133%, 其中有65个样品氦气含量不小于0.1%, 占比70.7%. 按照东胜气田探明天然气储量折算, 探明氦气地质储量约1.96×108m3, 为我国首个特大致密砂岩型富氦天然气藏. 结合东胜气田5个天然气样品中氦气同位素组成分布区间为3.03×10−8~3.44×10−8, 认为该气田氦气为典型壳源成因, 氦气源为基底富含铀、钍的花岗质基岩. 富氦天然气成藏受到区域构造活动控制, 沟通基底的断裂开启使得源岩中氦气释放, 沿断裂进入上覆地层与常规烃类气体混合聚集成藏. 结合鄂尔多斯盆地构造背景以及氦源岩分布特征, 该盆地北部与中部深层可能是氦气富集主要区域, 具勘探潜力.

饮用天然矿泉水中天然放射性水平一般都较低。１９９５年８月，我省发现了一处迄今为止天然放射性水平最高的饮用天然矿泉水源点。该水样中硒、锌和锶均达到了国家标准ＧＢ８５３７－９５《饮用天然矿泉水》中规定的相应界限值，仅由于水样中总β活度超出了该标准规定的限...

This paper discusses the Modern Chinese ditransitive construction with GEI, its word order patterns, including verb types and thematic roles of verb arguments that associated with different patterns of the construction. The paper also traces the historic development of the Chinese ditransitive construction as described by Peyraube (1994). It tries to apply natural information flow, or more specifically, principles of identifiability hierarchy, and distance-marking corespondence, to account for the varied word order patterns of the Modern Chinese ditransitive construction with GEI, in contrast to its historical development.