论盐类保存条件研究对四川盆地三叠系找钾工作的重要性

Significance of Salts Preservation Condition Research on Finding Potassium of the Triassic in Sichuan Basin

中文关键词:  古卤水浓缩程度  盐类保存条件  沉积成岩  古剥蚀淋滤  深埋封闭  再次剥蚀淋滤  三叠系  四川盆地

英文关键词:Paleolake brine concentration degree  Salts preservation condition  Deposition and salts formation  Denudation and leaching  Deep buried  Triassic  Sichuan Basin

中文摘要:

      四川盆地三叠系T1j^4、T1j^5成盐期卤水浓缩程度较高，已达钾盐沉积阶段，然而人们至今并未找到固相可溶性钾矿层。究其原因，乃盆地T1j^4,T1j^5盐类形成以来经历了沉积成岩-古剥蚀淋滤-深埋封闭-再次剥蚀淋滤等4个地质及水文地质发展阶段，可能导致固相盐类乃至钾矿层的溶滤破坏，因此加强对盐类成盐期极其以后地质历史发展阶段保存条件的研究极其重要，应予重视。

英文摘要:

      Brine concentration degree was high at salt formation stage of T1j^4, T1j^5 of the triassic in Sichuan Basin, and it had reached the stage of the deposition of potassium salt, however, potash ore layers have never been found. T1j^4 and T1j^5 salts underwent four stages： deposition and formation, denudation and leaching, deep buried, and secondary denudation and leaching, that probablely resulted in the destruction of solid phase salts and potash ore layers. Therefore, it is very important for us to research the salts formation period and preservation condition.