Discussion on Silicon Isotope of Bedded Siliceous docks of Different Ages in Yangtze Platform
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Abstract: Many sedimentary siliceous rock beds are found in Late Sinian to Late Paleozoic in Yangtze platform. It is difficult to clarify the origin and silicon sources of these siliceous rocks because of diagenetic changes,although some studies have been conducted on the rocks in dif-ferent aspects. However,silicon isotope of siliceous rocks is of fected little by diagenesis. It may be better to use silicon isotope to reflect the original sedimentary geochemical con-dition and silicon sources of siliceous rock,We here report 20 silicon isotope ratio results of siliceous rocks which deposited in differ-ent geological background. Combined with other geochemical features related to origin of siliceous rock,such as Al/(Al+Fe+Mn)and Fe/Ti,and features of bio一organism in the rocks, the silicon isotope results are compared and discussed. These results may provide a refe-pence for the application of silicon isotope in sedimentary siliceous rock study.
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Key words:
- Yangtze Platform /
- Siliceous rock /
- Silicon isotope
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