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1979年4月我们从采自青海大柴旦盐湖硼矿床东部湖滨矿区的标本中,首次在我国发现了含羟基的钠镁硫酸盐矿物——羟钠镁矾(Uklonskovite)。羟钠镁矾是M.H.斯留萨列娃1963年在苏联阿姆-达里河下游钻孔岩心中发现的新矿物。它产于第三纪粘土岩的孔洞中,共生矿物为无水芒硝和杂卤石。上覆盐层的石膏中富含钙芒硝、白钠镁矾、杂卤石和其他硫酸盐矿物。值得注意的是大柴旦盐湖硼矿中产出的羟钠镁矾与苏联的相比,不仅产状不同,而且结晶习性、光性方位和其他一些物理性质都有明显差异。这一发现有助于对该矿物的矿物学数据进行验证和补充,并对了解内陆盐湖硼矿床矿物组合的形成与转化也有一定的意义。
In April 1979, from the specimens collected from the lakeside mining area in the eastern part of Qinghai Dachaidan Salt Lake boron deposit, we found for the first time in China that Uklonskovite, a sodium-magnesium sulfate mineral containing hydroxyl groups. Hydroxene-magnesia is a new mineral discovered by M.H. Slyulysalva in the drilling cores of the lower reaches of the Am-Dali River in the Soviet Union in 1963. It is produced in the pores of Tertiary clay rocks, the symbiotic minerals are thenardite and polyhalite. Overlying salt gypsum is rich in glauberite, sodium boasite, polyhalite and other sulfate minerals. It is noteworthy that compared with the Soviet Union, the sodium-magnesium sulfate produced in the salt lake in Dachaqan County not only has different occurrences, but also crystal habit, optical orientation and some other physical properties. This finding is helpful to verify and supplement the mineralogy data of this mineral and also to understand the formation and transformation of mineral assemblages in the inland salt lake and boron mineral deposits.