浙江省寿昌盆地火山沉积型硼异常特征

在对浙江寿昌中生代火山沉积盆地寿昌组 (J3 s)地层进行的硼及相关多元素测试中 ,发现一处厚度大 ,层位稳定的较高含硼异常 ,钾、锂、铷、铯、砷、锑等含量亦高 ,与硼相关性好。经X射线衍射、能谱及电镜扫描等物性测试 ,初步确定存在独立的沉积型钙硼石类矿物 ,这为今后在该区寻找中生代火山沉积型硼矿奠定了良好的工作基础。

CHARACTERISTIC BORON ANOMALY OF VOLCANOGENE SEDIMENTARY TYPE IN SHOUCHANG BASIN IN ZHEJIANG

A variety of tests were put on the boron and related elements of the strata of the Shouchang group in a Mesozoic volcanogene sedimentary basin in Shouchang of Zhejiang to eventually locate a boron-high anomaly. It shows that the anomalous stratum is characteristic of great thickness, consistent stratohorizon, high contents of such elements as K, Li, Rb, Cs, As and Sb, and a better relationship to boron. An independent sedimentary mineral like calciborite was found and referred as colemanite by those who carried out the mineral identification including X-ray, energy spectrum and SEM. This find will lay good foundation for prospecting for sedimentary boron resource in the volcanosedimentary strata of the Mesozoic Shouchang basin.