Geochemical implications for the alteration of the Dras volcanic rocks from the ophiolites of Indus Suture Zone,Kashmir Himalaya |
| |
Authors: | T Radhakrishna V Divakara Rao |
| |
Institution: | (1) National Geophysical Research Institute, 500 007 Hyderabad, India;(2) Centre For Earth Science Studies, Post Box No. 2235, 695 010 Sasthamangalam, Trivandrum, India |
| |
Abstract: | The Dras volcanic rocks form a part of the ophiolite belt along the Indus Suture Zone in the Kashmir Himalaya. These volcanic
rocks have suffered alteration as in any other ophiolite zone. Three types of alterations spilitisation, submarine weathering
and ridongitisation were suggested. The spilitic mineralogy appears to be secondary and must have developed due to the reaction
of these rocks with hot sea water. Depletion of MgO and CaO and enrichment of K2O of these rocks relate to the submarine weathering at lower temperatures. Rodingitisation effect is reflected in the chemistry
of some rocks with enriched CaO and depleted SiO2. The trace elements — Co, Cr, Ni, Cu, Pb and Rb do not show any considerable changes during alteration. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|