tholeiitic

These rocks consist of olivine basalt, alkali olivine basalt, basanite and nephelinite, together with alkali diabase, tholeiitic diabase and analcite syenite which have been formed as a result of differentiation and contamination.

主要岩石类型有橄榄玄武岩、碱性橄榄玄武岩、碧玄岩、霞石岩以及由分异作用或混染作用形成的碱性辉绿岩、拉斑辉绿岩和方沸正长岩；

There was a syn-orogenic uplift-extensional tectonic setting in the terminal Late Triassic-Early Jurassic(ⅱ 3), when the NNE-directed rift coal-bearing basins formed and high-Na and low-K tholeiitic magma was erupted.

晚三叠世末&早侏罗世（Ⅱ3）为同造山上隆伸展环境，形成NNE向裂陷含煤盆地，高Na低K的拉斑玄武岩喷发。

The basic rocks, which belong to alkali and tholeiitic magma series, enriched in LREE and LIL. The magmatic source of basic volcanic rocks was enrichment mantle being analogous to oceanic island basalts sources.

基性火山岩有磁性玄武岩与拉斑玄武岩两个岩浆系列，且富集LREE与LIL，其岩浆源区为与洋岛玄武岩源相似的富集地幔柱源。