Geological Characteristics and Genetic Analysis of the Jiandingshan Strontium Deposit in Western Qaidam Basin
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摘要: 尖顶山天青石矿床位于柴达木盆地西北缘，矿体主要产于上新统狮子沟组上段含碳钙质泥岩及灰岩中，呈层状、似层状、透镜状，矿石以原生天青石矿石为主，品位较高，连续性好。含矿砂岩ΣREE值较低，平均为42.73×10-6，LREE/HREE平均为6.48；δEu平均为0.94，δCe平均为0.98；La/Yb-REE图中含矿岩石投点于沉积岩区，显示成矿物源具有多来源性特征；天青石矿的形成可能与深层地下卤水及盆地周缘陆缘碎屑物质富矿流体的补给紧密相关，表明该矿床成因可能具有陆源碎屑化学沉积型特征。Abstract: The Jiandingshan celestite deposit is located in the northwestern margin of the Qaidam Basin. The orebodies are mainly situated with layered, layered, lenticular shapes in calcareous mudstone containing carbon and limestone from the upper member of Pliocene Shizigou group. Orebody is mainly composed of native celestite, with high grade and good spatial continuity. Ore-bearing sandstone has lower ΣREE value with an average value of 42.73×10-6, its LREE/HREE ratio is 6.48, and δEu (0.94) and δCe (0.98) slightly negative anomaly. La/Yb-REE Plots denote that the ore-forming materials were derived from multiple sources with a main contribution from sedimentary rocks. The fluids for celestine formation might be derived from underground brine and peripheral continental basin. In summary, it's believed that this deposit may be had the characteristics of terrestrial detrital chemical deposition.
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Keywords:
- Jiandingshan /
- celestine /
- REE elements /
- mineralization mineral /
- genesis
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