皖北奥陶系古岩溶分期 分类及岩溶岩特征

Karstrocks features, types and periods of paleokarst Ordovician in the north of Anhui, China

研究表明，皖北奥陶系古岩溶可划分为沉积岩溶作用期、风化壳岩溶作用期、埋藏岩溶作用期、构造岩溶作用期和二次埋藏岩溶作用期；其岩溶类型主要有沉积岩溶、风化壳岩溶、埋藏岩溶或压释水岩溶和构造岩溶或热水岩溶四种类型；其岩溶岩包括岩溶沉积岩和岩溶改造岩两个大类。

According to observation and study, the paleokarstifications of Ordovician could be classified into 6 periods, i.e. depositional karstification, weathering curst karstification, burial karstification, semiburial structural karstification, second burial karstification stage, its karstic types have mainly deposition karst, emergence karst, burial karst, wqueezingwater and structural karst or hotwater karst, and its karstrocks can be distributed to two kinds of types, i.e. karstsedimentary rock and karstregenerated rock, and further to 8 subcategories and 5 subsubcategories in the north of Anhui, China.