Term
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Definition
| Rate at which the earth's temperature increases as depth increases. |
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Term
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Definition
| Increases heat and pressure stays constant. Occurs at subduction zones. |
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Term
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Definition
| Decrease in pressure while temperature stays the same. Occurs at MOR's. |
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Term
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Definition
| Water pockets get sucked under land, crates addition of heat melting. Occurs in subduction zones. |
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Term
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Definition
| The sequence of mineral-producing reactions that take place in a cooling, initially mafic, magma. |
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Term
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Definition
| Higher SiO2 concentration. Higher Na, K (Potassium). Lower Melting Point. High Silica Content. |
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Term
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Definition
| Higher Fe2 and Magnesium Concentrations. Higher Melting Point. Low Silica Content. |
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Term
| MOR is for felsic or mafic? |
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Definition
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Term
| Subduction zone is more felsic or mafic? |
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Definition
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Term
| Fractional Crystallization |
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Definition
| Process of progressive crystal formation, it progressively extracts iron and magnesium making the magma more felsic. |
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Term
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Definition
| Magma composition is altered though the corporation of surrounding rock. |
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Term
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Definition
Melt is more felsic that original rock.
Felsic: High silica concentration. Low Melting Point.
Mafic: Low silica concentration. High Melting Point. |
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Term
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Definition
| Magma rises as density decreases. Occurs in fractures of country rock, allowing magma to flow up the fractures. |
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