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川陕交界镇巴—城口震旦系毒重石成矿带，是我国唯一的毒重石成独立工业矿床的大型成矿带。毒重石矿层严格受Ｚｂ２ 地层控制。成矿介质为ＳＯ４ＨＣＯ３ － Ｃｌ－ Ｎａ － Ｋ 型热卤水。成矿场所为受同生断裂控制的拗陷盆地。后期快速堆积的重晶石矿层是ＢａＣＯ３ 矿层的保存条件。毒重石矿床属热水沉积成因层控矿床。
The Zhenba-Chengkou Sinian witherite metallogenic belt at the junction of Sichuan and Shaanxi is the only large-scale metallogenic belt in China that is the only witherite-independent industrial deposit. The wolframite layer is strictly controlled by the Zb2 formation. The metallogenic medium is SO4HHCO3 - Cl - Na - K hot brine. The metallogenic site is a depression basin controlled by syn-fault. Post-rapid accumulation of barite is BaCO3 ore deposit conditions. The witherite deposit is a hydrothermal sedimentary stratigraphic deposit.