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Calcium Amphibole Subgroup from
Gablor Hill eclogites, Kulp district, Diyarbakir Province, Turkey
| Locality type: | Outcrop | |
| Classification | ||
|---|---|---|
| Species: | 'Calcium Amphibole Subgroup' (not an IMA approved species) | |
| Formula: | AnCa2(C2+5-mCm3+)(Si8-(n+m)Al(n+m))W2 | |
| Comments: | Calcium amphiboles occurs in both kyanite-eclogites, quartz bearing kyanite-eclogites, quartz eclogites and in amphibole eclogites. They occur as: - colourless to very pale greenish brown amphiboles as large poikiloblastic crystals several mm across, enclosing smaller kyanite, zoisite and omphacite grains in kyanite-eclogite. - equigranular groundmass with omphacite and kyanite in kyanite-eclogite. - black amphiboles are visible in most hand-specimens of kyanite-eclogite - Rare pale brown grains in the matrix of quartz bearing and as inclusion in garnet from quartz bearing kyanite-eclogite. (pargasite) - 2-5mm large, interlocking prismatic crystals of pale amphibole enclosing and apparently overgrowing smaller grains of garnet, omphacite and rutil.(pargasite) - pale brown grains in the matrix of quartz-eclogite. (Magnesio-hornblende) - parallel-aligned equigranular omphacite, calcium amphibole and kyanite in amphibole eclogite - 2-5mm interlocking prismatic crystals of pale calcic amphibole enclosing and apparently overgrowing smaller garnet,omphacite and rutile Calcium amphiboles also occurs as a retrogression product as - pale green amphibole/oligioclase coronas along kyanite/omphacite boundaries. - bluish green hornblende kelyphitic rims around garnets. The chemical compositions of these amphiboles do not differ significanly; they are all pargasites near the join between pargasite and magnesio-hornblende. | |
| Confirmation | ||
| Validity: | Believed Valid | |
| Data | ||
| Mineral Data: | Click here to view Calcium Amphibole Subgroup data | |
| Locality Data: | Click here to view Gablor Hill eclogites, Kulp district, Diyarbakir Province, Turkey | |
| Data Identifiers | ||
| Mindat Occurrence Record ID: | 1749149 | |
| Long-form Identifier: | 1:3:1749149:5 | |
| GUID (UUID V4): | 0 | |
| References | ||
