| Locality type: | Complex |
| Classification |
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| Species: | Aegirine-augite |
| Formula: | (NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6 |
| Confirmation |
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| Validity: | Believed Valid |
| Data |
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| Mineral Data: | Click here to view Aegirine-augite data |
| Locality Data: | Click here to view Shira Complex, Shira, Bauchi, Nigeria |
| Data Identifiers |
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| Mindat Occurrence Record ID: | 1434433 |
| Long-form Identifier: | 1:3:1434433:6 |
| GUID (UUID V4): | f879ae08-741d-4afe-9067-1a1575ba4cd5 |
| References |
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| Reference Search (possible matching items) |
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 | | Journal (article/letter/editorial) | | association is found within an almost complete ring-dike. Augite, hornblende and biotite are the typical mafic ...intrudes an apparently comagmatic bimodal volcanic complex and folded Ordovician metasediments. while the...and foyaite) are only found in the Larvik ring complex (Neumann. 1980). Topsails suite The Topsails suite...hypersolvus biotite-amphibole granites, arfvedsonite-aegirine granites and quartz Kfeldspar porphyrys (Whalen...volcanics. The variety of lithologies suggests a complex history for this terrane. Initial 87Sr j 86 Sr |  | | Journal (article/letter/editorial) | | to the Lava Creek B ash bed of the Yellowstone complex (G. A. Izett, pers. comm., 2000). Associated phases...the average of 22 points. The Timedjelalen ring-complex is part of the Iforas alkaline province of Mali...shield and the West African craton 600 Ma ago. The complex comprises six principal concentric phases, T1 T6...47 12.47 21.73 2.01 7.00 P22 (1) (L) Chikala complex Malawi TABLE 1. New chemical analyses and structural...coarse-grained granite containing quartz, perthite, aegirine-augite, and Na- and Ca-amphiboles. The analysis in |
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