Petrochemistry of the Paleoproterozoic Udokan copper-bearing sedimentary complex |
| |
| Authors: | B N Abramov |
| |
| Institution: | (1) Institute of Natural Resources, Ecology, and Cryology, Siberian Branch, Russian Academy of Sciences, Ul. Butina 26, Post Box 147, Chita, 672090, Russia |
| |
| Abstract: | The maturity of terrigenous material of the Paleoproterozoic Udokan copper-bearing sedimentary complex is considered. The average values of hydrolyzate module (HM), alumina-silica module (AM), and Pettijohn’s coefficient of maturity appreciably vary throughout the Udokan Complex. Among cupriferous sandstones, rocks of the Aleksandrovka Formation are characterized by the highest maturity, whereas rocks of the Chitkanda Formation are distinguished by the lowest maturity. The maturity of cupriferous sandstones of the Sakukan Formation corresponds to that of host rocks. The maturity of cupriferous sandstones from the Aleksandrovka Formation is much higher than that of host rocks. In the Chitkanda Formation, the cupriferous sandstones are much less mature than host rocks. Climatic conditions in provenances estimated from the Nesbitt index of chemical weathering or chemical index of alteration (CIA) may be characterized as temperate ones without prominent climatic features. Most CIA values range from 46 to 66. The formation of copper-bearing sediments was closely related to the periods of volcanic activity. |
| |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ |
|
