[水]静海相的
At the first stage,source beds of microclastic sediments,rich in carbon,sulfur and gold,were de-veloped in a relatively euxinic semirestricted reducing basin. 成矿阶段的构造热液事件使金从变质细碎屑岩中淋出、迁移，或与其他来源的金汇集、沉淀构成矿床。
Keywords Yutangba;western Hubei;selenium deposits;black shale and bedded chert;enrichment multiple elements;anoxic or euxinic hydrothermal activity; 渔塘坝;湖北西部;硒矿床;硅质岩和页岩;多元素富集;缺氧或静海环境;
euxinic deposit 静海沉积,闭流海沉积
euxinic basin 滞流贫地
