By Zheng Mianping
Since 1956 the writer has been making vast and precise investigations of saline lakes at the Qinghai-Tibet plateau. at the foundation of huge quantities of trustworthy first-hand facts and multidisciplinary research, the ebook bargains with the temporal-spatial evolution of the plateau saline lakes and the customers for inorganic salts and natural assets and their exploitation and defense, in addition to the relationships among saline lakes and international alterations.
This publication is the 1st English monograph on saline lakes at the Qinghai-Tibet Plateau - the `Roof of the World'. in comparison with books approximately saline lakes in different components of the realm, this monograph is written in a multidisciplinary, complete and systematic means. it can be utilized by graduate scholars, lecturers, researchers, box geologists and engineers as a reference booklet in study, educating, etc.
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Extra resources for An Introduction to Saline Lakes on the Qinghai—Tibet Plateau
Subt. 6 2710 637 Chahanshilatu P. 2000 ± int. s. subt. S into brine c. t. 85 638 Potash L. 639 Dongling L. 2 Surf. t. 90 640 Gansenquan L. 2735 16 Surf. s .. subt. 90 Notes: 1. Surf. brine-surface brine; into brine-intercrystal brine; 2. s. C. S. c. c. -strong carbonate subtype; C. -Chlorite type. lakes. g) The plateau has been divided into metallogenic belts to aid in the search for new saline lake mineral resources. This has been coupled with a comprehensive survey and statistical analysis of the commercial resources of 94 saline lakes over the whole plateau region.
Genetically they can be grouped into 8 different types: 1) glacial lakes, 2) silted-river valley lakes (including barrier and oxbow lakes derived from rivers and debris flows), 3) interbank lakes, 4) dissolved-salt lakes,S) meterorite crater lakes, 6) hot-water lakes, 7) volcanic lakes, 8) tectonic lakes. The first five types of lakes are largely formed by external processes, whereas the final three types are essentially generated by internal processes. 6). , 1983). There are relatively few saline lake basins that formed as the result of exogenic factors, such as the actions of glaciers and rivers.
The final period of salt deposition was marked by substantial precipitation of carnalite and sylvite, and the contents of the economically important elements, K, Mg, Band Li, showed a large increase in the brine relative to previous periods. This is mainly related to long-continused chemical differentiation of the Late Cenozoic evaporite basins led to later concentration of more soluble salts. Besides, concentration of Band Li was also very likely to be related to Late Cenozoic hydrothermal-tectonic events in the region.