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COLLOFORM BANDING [1 record]
Record 1 - internal organization data 1999-05-03
Record 1, English
Record 1, Subject field(s)
- Mineralogy
Record 1, Main entry term, English
- colloform banding
1, record 1, English, colloform%20banding
correct
Record 1, Abbreviations, English
Record 1, Synonyms, English
Record 1, Textual support, English
Record number: 1, Textual support number: 1 DEF
A texture, often found in certain types of mineral deposits, where crystals have grown in a radiating and concentric manner which may reflect underlying geochemical controls. Lead-zinc deposits of sedimentary origin often show colloform banding of pyrite and sphalerite ... 2, record 1, English, - colloform%20banding
Record number: 1, Textual support number: 1 CONT
... colloform banding ... is a very fine scale banding involving one or more sulphides very like the banding in agate. Some workers believe that it results from colloidal deposition and that the banding is analogous to the Liesegang rings formed in some gels. This banding is very susceptible to destruction by recrystallization and may be partially or wholly destroyed by diagenesis or low grade metamorphism, producing a granular ore. 3, record 1, English, - colloform%20banding
Record number: 1, Textual support number: 2 CONT
Textures vary with the degree of recrystallization. The dominant original textures appear to be colloform banding of the sulphides with much development of framboidal pyrite, perhaps reflecting colloidal deposition. Commonly however, recrystallization, often due to some degree of metamorphism, has destroyed the colloform banding and produced a granular ore. 3, record 1, English, - colloform%20banding
Record 1, French
Record 1, Domaine(s)
- Minéralogie
Record 1, Main entry term, French
- rubanement colloforme
1, record 1, French, rubanement%20colloforme
proposal, masculine noun
Record 1, Abbreviations, French
Record 1, Synonyms, French
Record 1, Textual support, French
Record number: 1, Textual support number: 1 OBS
Voir «rubanement» et «colloforme». 1, record 1, French, - rubanement%20colloforme
Record 1, Spanish
Record 1, Textual support, Spanish
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