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碘作为一种矿产资源,长期以来主要取自与油、气、盐类相关的卤水和硝酸盐矿床(如智利)。七十年代以来又发现一些磷块岩矿床中有较高的含碘量。中国川、黔、鄂、湘等省某些磷块岩矿床中也富含可综合利用的碘,其中尤以贵州晚震旦世陡山沱期磷块岩含碘最富。近几年,笔者等对贵州晚震旦世陡山沱期磷块岩内碘的富集规律和条件做了些初步研究,兹简介如下。
Iodine, as a mineral resource, has long been predominantly derived from brine and nitrate deposits related to oil, gas and salts (eg Chile). Since the 1970s, some phosphorite deposits have also been found to have higher iodine content. Some phosphorite deposits in Sichuan, Guizhou, Hubei, Hunan and other provinces are also rich in iodine that can be used in a comprehensive manner. Especially in the Doushantuo period of Guizhou, the phosphorous is the richest in iodine. In recent years, I made some preliminary studies on the rules and conditions of iodine accumulation in the phosphorous rocks of the Doushantuo period in the late Sinian period of Guizhou Province.