Boron geochemical characteristics and the mechanisms of enrichment and mineralization
Boron is a critical non-metallic strategic mineral with extensive applications across chemical manufacturing,metallurgy,building materials,textiles,and nuclear technology,particularly in strategic industries.This paper reviews the geochemical characteristics of boron,its isotopic fractionation,and the distribution and genesis of major boron deposits globally.Boron shows significant variation in its natural distribution.The continental crust has significantly higher boron concentrations compared to the mantle.During various geological processes,boron tends to undergo differentiation,leading to the boron isotopic fractionation across different reservoirs.The enrichment of boron in the crust leads to the formation of borate minerals.Understanding the formation and transition conditions of the borate minerals,such as temperature,pressure,and oxygen fugacity,is crucial for understanding the genesis of boron deposits.This paper introduces the mineral assemblage and formation mechanisms of several major types of boron deposits,including volcanic-sedimentary,modern salt lake,marine evaporite,skarn-type,and sedimentary-metamorphic borate deposits.China also hosts different types of boron deposits,with the most significant reserves found in two areas:the sedimentary-metamorphic deposits in the Liaoning-Jilin area and the salt lake deposits in the Qinghai-Xizang area.This paper provides a detailed overview of these prominent borate deposits,including their mineral assemblage,occurrences,ages,and metallogenic models.Based on previous studies,the key scientific questions for future research are discussed.
万方数据
维普
