| 词汇 | syenite |
| 释义 | BETA Examples of syenitesyenite isn’t in the Cambridge Dictionary yet. You can help! In addition, late brittle faults are clearly visible in the mountain walls in both gneiss and quartz syenite massifs. The abundance of vent-derived lithologies such as syenite indicates a flux of lithic material late in the eruption. The quartz syenite is characterized by its massive appearance and reddish brown colour and the texture is coarse grained to pegmatitic. The dominant lithology in the studied area is alkali feldspar syenite/quartz syenite. The major constituent of the syenite is short-prismatic, euhedral perthite, up to 5 cm long. It is likely that the feldspars from the quartz syenite have undergone subsolidus re-equilibration. Perhaps, less obscurely, you may have wished how to establish if a rock is a syenite or a gabbro. Accidental syenite becomes an increasingly important lithic clast type in ignimbrites up-sequence, and is interpreted as recording the progressive development of a plutonic complex beneath the summit caldera. If the rock has a greater percentage of alkali feldspar, it grades into a syenite. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The mineral occurs in nepheline syenite pegmatites and granite and aplite greisens. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Phlogopite is found as small metamorphic crystals in marble xenoliths within the syenite. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. It consists of red-green granite (epidotic syenite) that was quarried for many years. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Iron-rich solutions precipitated the iron on to a syenite porphyry footwall. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The petrology of the pluton consists of three stocks which are gabbro-diorite, syenite and granite. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Units within the complex include carbonatite, nepheline syenite, phonolite, and ijolite. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Connected with the borolanite there are other types of nepheline syenite and pegmatite. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. It occurs in hornfels and siliceous marble xenoliths within and adjacent to a nepheline syenite intrusion. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. |
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