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| Definition | : | Total Alkali-Silica |
| Category | : | Academic & Science » Geology |
| Country/ Region |
: | Worldwide
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| Popularity | : |
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Total Alkali-Silica (TAS) diagram is a classification scheme in the field of rock classification. It is a scatterplot that helps geologists and petrologists categorize volcanic rocks based on their chemical compositions.
TAS diagram typically plots the weight percent of silica (SiO2) on the x-axis against the total alkali content on the y-axis.
The alkali components considered are sodium oxide (Na2O) and potassium oxide ( K2O).
The purpose of this diagram is to distinguish between different types of volcanic rocks and aid in the identification of their mineralogical and petrological characteristics.
The full form of TAS is Total Alkali-Silica
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