| 摘要: |
| 上新世盐类沉积仅分布于柴达木盆地两部、昆仑山和唐古拉山北坡;晚更新世-全新世盐类沉积广布于羌塘和柴达木盆地。盐湖沉积只有蒸发岩和碎屑沉积物互层特点, 系干湿交替的内陆气候和动荡浅水环境下的湖相沉积。迄今已发现62种盐类矿物, 其析出具有阶段性特征, 青藏更新世-全新世盐湖自析阶段的起始时间分别为14C 24000和9000a B.P., 钾盐和硼酸盐各有两种典型的矿物共生组合。丰富的盐湖矿物资源是该区走向繁荣的物质基础之一。 |
| 关键词: 青藏高原 盐类沉积 盐湖矿物 |
| DOI：10.18307/1991.0101 |
| 分类号: |
| 基金项目: |
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| Saline Deposits And Minerals Of Salt Lakes In Qinghai-Xizang Plateau |
|
Yang Shaoxiu
|
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Qinghai Institute of Salt Lakes, Academia Slntca, Xining 810008
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| Abstract: |
| Saline deposits in Pliocene distribute in the Western Qaidam Basin, the Kunlun Mountains' and the Northern Tanggola Range, but those in Late Pleistocene-Holocene Epoch widely distribute in Northern Xizang and the Qaidam Basin. Salt lake deposits arc characterized by interbeded evaporatic and clastic sediments with lacustrine facies deposits under inland, dry/wet alternating climatic and unstable shallow water circumstances. 62 saline minerals have been discovered as of now. There exist several separation stages. The beginning age of the self-separation:stage of salt lakes of Late-Pleistocene-Holocene Epoch in the Qinghai-Xizang Plateau arc 24000 a B.P.and 9000 a B.P. respectively according to l4C dating. Potash salt and borate have two typical mineral assemblages respectively. Abundance of mineral resources of salt lake is one of the material bases for the development of this district. |
| Key words: saline deposits saline minerals Qingha-Xizang Plateau |
