Item Infomation
Title: | Spheroidal weathering of basalt from Gebel Qatrani, Fayum Depression, Egypt |
Authors: | El-Hinnawi, Essam |
Participants: | Abayazeed, S. D. Khalil, A. S. |
Issue Date: | 2021 |
Series/Report no.: | Bulletin of the National Research Centre, Volume 45 (2021), Article number: 1 |
Abstract: | The core-stones of the basalt spheroids are composed of phenocrystals of plagioclase feldspars and clinopyroxenes set in a groundmass of tiny feldspars and pyroxenes, relatively altered olivine and opaque minerals. The basalt is subalkali (tholeiitic). The outer weathered shells surrounding the core-stones are composed of partly altered feldspars and pyroxenes. The calculated weathering indices show that there is marked weathering trend from the core-stones of the spheroids to the outer shells. The chemical mobility of the elements shows marked depletion of Mg, Ca, Na and K from the core-stones to the outer shells due to the weathering of olivine, pyroxene and feldspars. The trace elements Rb, Sr, Ni, V, Cr and Zn are also depleted. |
URI: | http://tailieuso.tlu.edu.vn/handle/DHTL/12293 |
Source: | https://link.springer.com/article/10.1186/s42269-020-00453-2 |
ISSN: | 2522-8307 |
Appears in Collections: | Tài liệu mở |
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