Clay Mineral Distribution in Surface Sediments of the Southern Okinawa Trough
Date Issued
2008
Date
2008
Author(s)
Cheng, Chih-Jui
Abstract
Clay minerals are one of the most useful indicators marine geology to decipher the source and transport of sediments in oceanography. The composition and distribution of clay minerals in sediments are related to the climate and the nature of their parent rocks.n this study, the analysis result of the clay minerals illite is the most abundant clay mineral in the southern Okinawa Trough (SOT), the chlorite and kaolinite are more in the study area. The amount of smectite is the lowest in the sediment.he amount of illite increases from west to east SOT and the crystallinity of illite shows it might come from the weathering of rocks in the anchizone in the watershed of Lan-Yang River. The amount of chlorite and kaolinite is higher at the Mien-Hwa Canyon and the deepest part of SOT. The good correlation between chlorite, kaolinite and the turbidte distribution suggests that they were transported from the shelf or slope. We also observed that the amounts of smectite in the sediments are related to submarine volcanoes in the adjacent area. According to the Esquevin-Index, there is no difference between the amount of Fe,Mg-rich illite and Al-rich illite in the sediments of SOT. In some areas, the lower Esquevin-Index values indicate that the parent rocks might be more biotitic.omparing the composition of clay minerals in the SOT and the riverine sediments of the Eastern Taiwan, we found that the Lan-Yang River is the most important source to the sediments in the SOT.
Subjects
clay minerals
southern Okinawa Trough
XRD
chamosite
SDGs
Type
thesis
File(s)![Thumbnail Image]()
Loading...
Name
ntu-97-R94241302-1.pdf
Size
23.53 KB
Format
Adobe PDF
Checksum
(MD5):9434a7ec05cb8c5ab005a519b1c38773