青藏高原火山-沉积硼矿找矿的新发现与远景分析

本文报道了青藏高原火山-沉积硼矿找矿的新成果,首次发现和确认在青藏高原存在富硼的火山-沉积二元结构的地层,其构造位置、岩石地层组合和时代与同一成矿带西部的安纳托利亚高原的大型火山-沉积硼矿床都一致,且地层的稀碱金属元素含量高正异常,并已发现有团块或条带状的钠硼解石和硼砂等硼酸盐矿物,局部硼含量达边界品位。说明雄巴盆地具备形成火山-沉积硼矿床的构造地质、岩石矿物和地球化学的先决条件,具有形成大型火山-沉积硼矿的潜力。该发现是我国突破大型火山-沉积硼矿的先导性成果,为在青藏高原找寻该类型硼矿床提供重要科学依据。

New Findings and Perspective Analysis of Prospecting for Volcanic Sedimentary Boron Deposits in the Tibetan Plateau

This paper reports the new achievements in the prospecting for volcanic sedimentary boron deposits. The presence of strata of boron-rich volcanic sedimentary binary structure in the Tibetan Plateau was discovered and confirmed for the first time. The tectonic location, stratigraphic combination and the age of the strata are consistent with features of the strata of the large volcanic sedimentary boron deposits in Western Anatolia plateau. The strata have positive high anomaly of rare alkali metal elements, and boron element content has reached ore cutoff grade in some intervals; in addition, crumbly or banded borate minerals were found. These discoveries show that the Xiongba basin has the geological, mineral and geochemical prerequisites of the volcanic sedimentary deposits, and possesses the potential of large deposits. This discovery belongs to the basic superior result in the search for volcanic sedimentary boron deposits in China, which provides important scientific basis for the discovery of this type of boron deposits in the Tibetan Plateau.