四川盆地三叠纪卤水成藏条件

四川盆地三叠纪卤水分布广泛 ,资源丰富 ,品质优异 ,是我国开发利用时间最早 ,工业价值最高的卤水资源。卤水有碎屑岩和碳酸盐岩两大储集类型 ,皆为低孔隙 ,低渗透致密岩石 ,不利于卤水的运聚 ,而卤水成藏条件主要是由储卤层受后期构造应力形成的断裂及裂隙发育带所控制 ,这是卤水高产富集的主导因素

CONDITIONS FOR SICHUAN BASIN TO TRAP TRIASSIC BRINE

Sichuan basin is known for Triassic brine to have be widely spread with rich resources, excellent quality, higher industrial value and a long tapping history. Detrital rock and carbonatite stand as two important brine-trapping rocks because of lower porosity, lower osmosis and hence higher compactness. However, these do little with movement and enrichment of the brine so its preservation is controlled essentially by the faults and fissured belt of the brine-bearing beds after they were destroyed by post-deposition structural stress, a leading factor that led to higher enrichment and output of the brine.