摘要:
中国地质科学院矿产资源研究所郑绵平院士钾盐团队在地质调查项目和国家自然科学基金重点项目联合资助下,联合柴达木综合地质矿产勘查院等单位,在柴达木盆地西部阿尔金山前第四纪早期地层发现新型砂砾含钾卤水层,根据钻探资料控制的资源量3.5亿吨,有望成为柴达木盆地钾盐后备基地。在塔里木库车凹陷发现厚达百米的古新纪含钾盐矿层,氯化钾达工业品位盐层厚度为41 m;深入阐明了在四川盆地大规模三叠系杂卤石资源:提出该资源既是深层富钾卤水钾重要来源,更是宝贵的缓释钾肥;对上扬子盆地13个储卤构造含钾卤水矿进行评估,估算氯化钾资源量4917万吨;在滇西南勐野井建立钾盐二层楼成矿模式,大幅度缩小陕北奥陶系盐盆找钾靶区,海相钾盐找矿崭露曙光。
Abstract:
The salt formation theory has led to the breakthrough and important progress in potash deposit prospecting: a new type gravel brine layer rich in potassium was discovered in the early pre-Quaternary strata in Altun Mountains in the west of Qaidam Basin. This progress was made by the Salt Party of the Institute of Mineral Resources, Chinese Academy of Geological Sciences, headed by Professor ZhengMianping, academician of the Chinese Academy of Engineering, with such institutions as the Qaidam Comprehensive Exploration Institute of Geology and Mineral Resources as the co-researchers and under the joint support of geological survey projects and key projects of the National Natural Science Foundation of China. Drilling shows that it possesses the estimated resource quantity of 350 million tons and hence is likely to be the reserve base of potash salt in Qaidam Basin. Additionally, Paleogene potash-bearing ore beds with the thickness of 100 meters were found in Kuqa depression, Tarim, where there is a 41 meter-thick salt bed of potassium chloride that reaches industrial grade. Furthermore, Triassic polyhalite was found in Sichuan Basin, which is not only an important potassium source in deep brine rich in potash but also a precious slow-release potassium fertilizer. Besides, in Upper Yangtze River Basin, 13 potassium-rich brine deposits of brine-bearing structure were evaluated, and the potassium chloride resource is estimated to be 49.17 million tons. What is more, in Mengyejing of southwestern Yunnan Province, a“two-storey”potash-forming model was set up, and, in Ordovician salt basin of northern Shaanxi Province, the area of potash prospecting target area has been largely reduced, which shows the dawn of the breakthrough in marine potash prospecting.
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