词汇 | chlorite |
释义 | BETA Examples of chloritechlorite isn’t in the Cambridge Dictionary yet. You can help! Other alteration products are chlorite, sericite, quartz and opaque minerals. Slight alteration and hydration of the silicate phases (typically along fractures) has resulted in a secondary assemblage including chlorite, ser pentine, sericite and rare calcite. Within the orange-brown matrix, some sheafs of unaltered chlorite were identified, with some sheafs displaying mild flexuring. This present fabric is made of a phengite-chlorite foliation and recrystallized albite- and quartz-rich ribbons. Partial retrogression is evident from the form of very fine-grained chlorite, calcite and actinolite. On the other hand, chlorate and chlorite can be formed, which may be tasted and smelled. The fine-grained, low-temperature alteration paragenesis includes chlorite, white mica, epidote s. l., titanite and prehnite. The most important feature of the contact zone is the development of randomly orientated chlorite pseudomorphs. However, further work is necessary to determine the age of the replacement chlorite. The glassy matrix of the rock was totally replaced by chlorite minerals. The vesicles are filled with calcite, chlorite, quartz and carbon. This study concentrates on the latter which contain abundant chlorite-rich layers, commonly rich in magnetite and haematite grains. Undeformed, cross-cutting stilpnomelane veins, in places altered to chlorite, are characteristic of the contact zone. Some clinopyroxene crystals are altered to actinolite and chlorite. There are also fractures filled with prehnite, epidote and chlorite. It is composed of biotite and amphibole granodiorites, with slightly deformed biotites and locally weakly altered to chlorite. There are also amygdules filled with calcite, chlorite and quartz. Retrogressive chlorite replacement is characteristic along the shear bands. The youngest dates were obtained from biotites slightly altered to chlorite, and represent minimum ages. |
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