安棚地区天然碱矿沉积特征及成因研究

Deposition and genesis of the trona deposits in the Anpeng region,Henan

Key Laboratory of Oil Resources and Exploration, School of Geosciences, Yangtze University, Jingzhou 434023, Hubei, China

摘要: 本文通过录井、测井、岩心、薄片、孢粉组合等资料,对安棚地区天然碱矿的沉积特征及成矿条件进行探讨,重点分析研究了碱矿成因。研究表明,天然碱是在干旱-半干旱气候条件下蒸发结晶而成,与泥质白云岩互层分布。少量天然碱发育于早先形成的白云岩孔隙中。天然碱形成过程包括钠盐的形成和碱化反应。碱矿分布的主控因素为白云岩相带。
- 安棚地区 /
- 天然碱矿 /
- 沉积特征 /
- 成因机制 /
- 白云岩
Abstract: The Anpeng region,Henan abounds in trona resources.The present paper focuses on the deposition and accumulation,and genesis and processes of the trona deposits in the light of mud logs,well logs,cores,thin sections and sporopollen assemblages.The results of research show that trona mainly precipitated and crystallized in the arid and semi-arid climatic conditions,and occurs as the interbeds with(muddy) dolostones and/or the fillings in the pre-existing pores of dolostones.Two stages are recognized for the formation of trona: formation of sodium and alkaline reaction.It can be seen that the dolostone facies zone may be the favourable zone for the occurrence of trona deposits.
- Anpeng region /
- trona /
- deposition /
- genesis /
- dolostone