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VOOZH | about |
| Regional Level Types | |
|---|---|
| Somanya๏ผKpong and Pore Areas | Occurrence |
| Asuogyaman District | District |
| Eastern Region | Region |
| Ghana | Country |
| โ Aegirine-augite Formula: (NaaCabFe2+cMgd)(Fe3+eAlfFe2+gMgh)Si2O6 References: |
| โ Albite Formula: Na(AlSi3O8) References: |
| โ 'Allanite Group' Formula: (A12+REE3+)(M13+M23+M32+)O[Si2O7][SiO4](OH) References: |
| โ 'Amphibole Supergroup' Formula: AB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2 Description: Amphiboles range up to 10 modal percent with biotite and aegirine-rich pyroxene in the leucocratic nepheline gneisses, and may be as much as 55 percent in the mafic and feldspar-poor nepheline gneisses
where they occur with grandite and aegirine-augites closer to soda augite. The amphiboles are black in hand specimens and may form a lineation.
Hastingsite (as defined by Leake, 1968) and iron-rich alkaline amphibole are the only types present. The leucocratic nepheline gneisses contain amphiboles richest in Na and Fe3+. (Holm, 1971) References: |
| โ Andradite Formula: Ca3Fe3+2(SiO4)3 References: |
| โ 'Apatite' Formula: Ca5(PO4)3(Cl/F/OH) References: |
| โ Augite Formula: (CaxMgyFez)(Mgy1Fez1)Si2O6 References: |
| โ 'Biotite' Formula: K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 References: |
| โ Calcite Formula: CaCO3 References: |
| โ Cancrinite Formula: (Na,Ca,โป)8(Al6Si6O24)(CO3,SO4)2 ยท 2H2O References: |
| โ Epidote Formula: (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) References: |
| โ 'Ferro-ferri-sadanagaite' ? Formula: {Na}{Ca2}{Fe2+3Fe3+2}(Al3Si5O22)(OH)2 Description: Holm (1974) provide a wet-chemical analysis corresponding to ferro-ferri-sadanagaite:
SiO2, 37.02%
TiO2, 1.64%
Al2O3, 17.29%
Fe2O3, 7.79%
FeO, 14.94%
MnO, 0.53%
MgO, 5.19%
CaO, 9.46%
Na2O, 3.38%
K2O, 2.4%
When this is normalized (using Locock 2014), the empirical formula becomes (Na0.592K0.469)ฮฃ1.061 (Ca1.552Na0.411Mn0.038)ฮฃ2.001 (Feii1.913Mg1.184FeIII0.897Al0.786Ti0.189Mnii0.031)ฮฃ5 (Si5.667Al2.333)ฮฃ8 O22 ((OH)1.622O0.378)ฮฃ2. With exception of a slightly high A content (1.061 apfu), Holm's data normalizes well. However, his other analyses show a too high C3+ content, and the interpretation of this analysis as ferro-ferri-sadanagaite is therefore questioned.
References: |
| โ Fluorite Formula: CaF2 References: |
| โ 'Garnet Group' Formula: X3Z2(SiO4)3 References: |
| โ Grossular Formula: Ca3Al2(SiO4)3 References: |
| โ Hastingsite Formula: NaCa2(Fe2+4Fe3+)(Si6Al2)O22(OH)2 References: |
| โ Microcline Formula: K(AlSi3O8) References: |
| โ Muscovite Formula: KAl2(AlSi3O10)(OH)2 References: |
| โ Nepheline Formula: Na3K(Al4Si4O16) References: |
| โ 'Plagioclase' Formula: (Na,Ca)[(Si,Al)AlSi2]O8 References: |
| โ Potassic-ferro-ferri-taramite ? Formula: K(CaNa)(Fe2+3Fe3+2)(Al2Si6O22)(OH)2 Description: Holm (1974) provide a wet-chemical analysis corresponding to potassic-ferro-ferri-taramite:
SiO2, 37.58%
TiO2, 1.66%
Al2O3, 15.11%
Fe2O3, 20.75%
FeO, 9.25%
MnO, 1.06%
MgO, 1.06%
CaO, 5.53%
Na2O, 5.1%
K2O, 2.8%
When this is normalized (using Locock 2014), the empirical formula becomes (K0.55Na0.434)ฮฃ0.984 (Na1.088Ca0.912)ฮฃ2 (FeIII2.404Feii1.191Al0.526Mg0.243Ti0.192Mnii0.138)ฮฃ4.694 (Si5.785Al2.215)ฮฃ8 O22 ((OH)1.615O0.385)ฮฃ2. This gives a low total in the C position ( 4.694) of which 3.122 apfu is trivalent. Both of these indicate analytical errors. |
| โ Potassic-ferro-sadanagaite ? Formula: {K}{Ca2}{Fe2+3Al2}(Al3Si5O22)(OH)2 Description: Holm (1974) provide a wet-chemical analysis corresponding to potassic-ferro-sadanagaite:
SiO2, 35.52%
TiO2, 1.798%
Al2O3, 19.57%
Fe2O3, 6.51%
FeO, 18.45%
MnO, 0.51%
MgO, 2.72%
CaO, 9.27%
Na2O, 2.84%
K2O, 2.58%
When this is normalized (using Locock 2014), the empirical formula becomes (K0.509Na0.509)ฮฃ1.018 (Ca1.537Na0.343Mn0.067Fe0.052)ฮฃ1.999 (Feii2.336Al1.069FeIII0.758Mg0.628Ti0.209)ฮฃ5 (Si5.498Al2.502)ฮฃ8 O22 ((OH)1.581O0.419)ฮฃ2. With exception of a slightly high A content (1.018 apfu), Holm's data normalizes well. However, his other analyses show a too high C3+ content, and the interpretation of this analysis as potassic-ferro-sadanagaite is therefore questioned. References: |
| โ Quartz Formula: SiO2 References: |
| โ 'Sodic amphibole' References: |
| โ Titanite Formula: CaTi(SiO4)O References: |
| โ Vesuvianite Formula: Ca19Fe3+Al4(Al6Mg2)(โป4)โป[Si2O7]4[(SiO4)10]O(OH)9 References: |
| โ Zircon Formula: Zr(SiO4) References: |
| Group 3 - Halides | |||
|---|---|---|---|
| โ | Fluorite | 3.AB.25 | CaF2 |
| Group 4 - Oxides and Hydroxides | |||
| โ | Quartz | 4.DA.05 | SiO2 |
| Group 5 - Nitrates and Carbonates | |||
| โ | Calcite | 5.AB.05 | CaCO3 |
| Group 9 - Silicates | |||
| โ | Andradite | 9.AD.25 | Ca3Fe3+2(SiO4)3 |
| โ | Grossular | 9.AD.25 | Ca3Al2(SiO4)3 |
| โ | Zircon | 9.AD.30 | Zr(SiO4) |
| โ | Titanite | 9.AG.15 | CaTi(SiO4)O |
| โ | Epidote | 9.BG.05a | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| โ | Vesuvianite | 9.BG.35 | Ca19Fe3+Al4(Al6Mg2)(โป4)โป[Si2O7]4[(SiO4)10]O(OH)9 |
| โ | Augite | 9.DA.15 | (CaxMgyFez)(Mgy1Fez1)Si2O6 |
| โ | Aegirine-augite | 9.DA.20 | (NaaCabFe2+cMgd)(Fe3+eAlfFe2+gMgh)Si2O6 |
| โ | Hastingsite | 9.DE.15 | NaCa2(Fe2+4Fe3+)(Si6Al2)O22(OH)2 |
| โ | Potassic-ferro-sadanagaite ? | 9.DE.15 | {K}{Ca2}{Fe2+3Al2}(Al3Si5O22)(OH)2 |
| โ | 'Ferro-ferri-sadanagaite' ? | 9.DE.15 | {Na}{Ca2}{Fe2+3Fe3+2}(Al3Si5O22)(OH)2 |
| โ | Potassic-ferro-ferri-taramite ? | 9.DE.20 | K(CaNa)(Fe2+3Fe3+2)(Al2Si6O22)(OH)2 |
| โ | Muscovite | 9.EC.15 | KAl2(AlSi3O10)(OH)2 |
| โ | Nepheline | 9.FA.05 | Na3K(Al4Si4O16) |
| โ | Microcline | 9.FA.30 | K(AlSi3O8) |
| โ | Albite | 9.FA.35 | Na(AlSi3O8) |
| โ | Cancrinite | 9.FB.05 | (Na,Ca,โป)8(Al6Si6O24)(CO3,SO4)2 ยท 2H2O |
| Unclassified | |||
| โ | 'Amphibole Supergroup' | - | AB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2 |
| โ | 'Biotite' | - | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 |
| โ | 'Plagioclase' | - | (Na,Ca)[(Si,Al)AlSi2]O8 |
| โ | 'Garnet Group' | - | X3Z2(SiO4)3 |
| โ | 'Apatite' | - | Ca5(PO4)3(Cl/F/OH) |
| โ | 'Allanite Group' | - | (A12+REE3+)(M13+M23+M32+)O[Si2O7][SiO4](OH) |
| โ | 'Sodic amphibole' | - | |
| H | Hydrogen | |
|---|---|---|
| H | โ Amphibole Supergroup | AB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2 |
| H | โ Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 |
| H | โ Cancrinite | (Na,Ca,โป)8(Al6Si6O24)(CO3,SO4)2 ยท 2H2O |
| H | โ Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| H | โ Hastingsite | NaCa2(Fe42+Fe3+)(Si6Al2)O22(OH)2 |
| H | โ Muscovite | KAl2(AlSi3O10)(OH)2 |
| H | โ Vesuvianite | Ca19Fe3+Al4(Al6Mg2)(โป4)โป[Si2O7]4[(SiO4)10]O(OH)9 |
| H | โ Potassic-ferro-sadanagaite | {K}{Ca2}{Fe32+Al2}(Al3Si5O22)(OH)2 |
| H | โ Ferro-ferri-sadanagaite | {Na}{Ca2}{Fe32+Fe23+}(Al3Si5O22)(OH)2 |
| H | โ Apatite | Ca5(PO4)3(Cl/F/OH) |
| H | โ Potassic-ferro-ferri-taramite | K(CaNa)(Fe32+Fe23+)(Al2Si6O22)(OH)2 |
| H | โ Allanite Group | (A12+REE3+)(M13+M23+M32+)O[Si2O7][SiO4](OH) |
| C | Carbon | |
| C | โ Calcite | CaCO3 |
| C | โ Cancrinite | (Na,Ca,โป)8(Al6Si6O24)(CO3,SO4)2 ยท 2H2O |
| O | Oxygen | |
| O | โ Aegirine-augite | (NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6 |
| O | โ Albite | Na(AlSi3O8) |
| O | โ Amphibole Supergroup | AB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2 |
| O | โ Andradite | Ca3Fe23+(SiO4)3 |
| O | โ Augite | (CaxMgyFez)(Mgy1Fez1)Si2O6 |
| O | โ Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 |
| O | โ Calcite | CaCO3 |
| O | โ Cancrinite | (Na,Ca,โป)8(Al6Si6O24)(CO3,SO4)2 ยท 2H2O |
| O | โ Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| O | โ Grossular | Ca3Al2(SiO4)3 |
| O | โ Hastingsite | NaCa2(Fe42+Fe3+)(Si6Al2)O22(OH)2 |
| O | โ Microcline | K(AlSi3O8) |
| O | โ Muscovite | KAl2(AlSi3O10)(OH)2 |
| O | โ Nepheline | Na3K(Al4Si4O16) |
| O | โ Quartz | SiO2 |
| O | โ Titanite | CaTi(SiO4)O |
| O | โ Vesuvianite | Ca19Fe3+Al4(Al6Mg2)(โป4)โป[Si2O7]4[(SiO4)10]O(OH)9 |
| O | โ Zircon | Zr(SiO4) |
| O | โ Potassic-ferro-sadanagaite | {K}{Ca2}{Fe32+Al2}(Al3Si5O22)(OH)2 |
| O | โ Plagioclase | (Na,Ca)[(Si,Al)AlSi2]O8 |
| O | โ Garnet Group | X3Z2(SiO4)3 |
| O | โ Ferro-ferri-sadanagaite | {Na}{Ca2}{Fe32+Fe23+}(Al3Si5O22)(OH)2 |
| O | โ Apatite | Ca5(PO4)3(Cl/F/OH) |
| O | โ Potassic-ferro-ferri-taramite | K(CaNa)(Fe32+Fe23+)(Al2Si6O22)(OH)2 |
| O | โ Allanite Group | (A12+REE3+)(M13+M23+M32+)O[Si2O7][SiO4](OH) |
| F | Fluorine | |
| F | โ Amphibole Supergroup | AB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2 |
| F | โ Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 |
| F | โ Fluorite | CaF2 |
| F | โ Apatite | Ca5(PO4)3(Cl/F/OH) |
| Na | Sodium | |
| Na | โ Aegirine-augite | (NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6 |
| Na | โ Albite | Na(AlSi3O8) |
| Na | โ Cancrinite | (Na,Ca,โป)8(Al6Si6O24)(CO3,SO4)2 ยท 2H2O |
| Na | โ Hastingsite | NaCa2(Fe42+Fe3+)(Si6Al2)O22(OH)2 |
| Na | โ Nepheline | Na3K(Al4Si4O16) |
| Na | โ Plagioclase | (Na,Ca)[(Si,Al)AlSi2]O8 |
| Na | โ Ferro-ferri-sadanagaite | {Na}{Ca2}{Fe32+Fe23+}(Al3Si5O22)(OH)2 |
| Na | โ Potassic-ferro-ferri-taramite | K(CaNa)(Fe32+Fe23+)(Al2Si6O22)(OH)2 |
| Mg | Magnesium | |
| Mg | โ Aegirine-augite | (NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6 |
| Mg | โ Augite | (CaxMgyFez)(Mgy1Fez1)Si2O6 |
| Mg | โ Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 |
| Mg | โ Vesuvianite | Ca19Fe3+Al4(Al6Mg2)(โป4)โป[Si2O7]4[(SiO4)10]O(OH)9 |
| Al | Aluminium | |
| Al | โ Aegirine-augite | (NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6 |
| Al | โ Albite | Na(AlSi3O8) |
| Al | โ Amphibole Supergroup | AB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2 |
| Al | โ Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 |
| Al | โ Cancrinite | (Na,Ca,โป)8(Al6Si6O24)(CO3,SO4)2 ยท 2H2O |
| Al | โ Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| Al | โ Grossular | Ca3Al2(SiO4)3 |
| Al | โ Hastingsite | NaCa2(Fe42+Fe3+)(Si6Al2)O22(OH)2 |
| Al | โ Microcline | K(AlSi3O8) |
| Al | โ Muscovite | KAl2(AlSi3O10)(OH)2 |
| Al | โ Nepheline | Na3K(Al4Si4O16) |
| Al | โ Vesuvianite | Ca19Fe3+Al4(Al6Mg2)(โป4)โป[Si2O7]4[(SiO4)10]O(OH)9 |
| Al | โ Potassic-ferro-sadanagaite | {K}{Ca2}{Fe32+Al2}(Al3Si5O22)(OH)2 |
| Al | โ Plagioclase | (Na,Ca)[(Si,Al)AlSi2]O8 |
| Al | โ Ferro-ferri-sadanagaite | {Na}{Ca2}{Fe32+Fe23+}(Al3Si5O22)(OH)2 |
| Al | โ Potassic-ferro-ferri-taramite | K(CaNa)(Fe32+Fe23+)(Al2Si6O22)(OH)2 |
| Si | Silicon | |
| Si | โ Aegirine-augite | (NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6 |
| Si | โ Albite | Na(AlSi3O8) |
| Si | โ Amphibole Supergroup | AB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2 |
| Si | โ Andradite | Ca3Fe23+(SiO4)3 |
| Si | โ Augite | (CaxMgyFez)(Mgy1Fez1)Si2O6 |
| Si | โ Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 |
| Si | โ Cancrinite | (Na,Ca,โป)8(Al6Si6O24)(CO3,SO4)2 ยท 2H2O |
| Si | โ Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| Si | โ Grossular | Ca3Al2(SiO4)3 |
| Si | โ Hastingsite | NaCa2(Fe42+Fe3+)(Si6Al2)O22(OH)2 |
| Si | โ Microcline | K(AlSi3O8) |
| Si | โ Muscovite | KAl2(AlSi3O10)(OH)2 |
| Si | โ Nepheline | Na3K(Al4Si4O16) |
| Si | โ Quartz | SiO2 |
| Si | โ Titanite | CaTi(SiO4)O |
| Si | โ Vesuvianite | Ca19Fe3+Al4(Al6Mg2)(โป4)โป[Si2O7]4[(SiO4)10]O(OH)9 |
| Si | โ Zircon | Zr(SiO4) |
| Si | โ Potassic-ferro-sadanagaite | {K}{Ca2}{Fe32+Al2}(Al3Si5O22)(OH)2 |
| Si | โ Plagioclase | (Na,Ca)[(Si,Al)AlSi2]O8 |
| Si | โ Garnet Group | X3Z2(SiO4)3 |
| Si | โ Ferro-ferri-sadanagaite | {Na}{Ca2}{Fe32+Fe23+}(Al3Si5O22)(OH)2 |
| Si | โ Potassic-ferro-ferri-taramite | K(CaNa)(Fe32+Fe23+)(Al2Si6O22)(OH)2 |
| Si | โ Allanite Group | (A12+REE3+)(M13+M23+M32+)O[Si2O7][SiO4](OH) |
| P | Phosphorus | |
| P | โ Apatite | Ca5(PO4)3(Cl/F/OH) |
| S | Sulfur | |
| S | โ Cancrinite | (Na,Ca,โป)8(Al6Si6O24)(CO3,SO4)2 ยท 2H2O |
| Cl | Chlorine | |
| Cl | โ Amphibole Supergroup | AB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2 |
| Cl | โ Apatite | Ca5(PO4)3(Cl/F/OH) |
| K | Potassium | |
| K | โ Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 |
| K | โ Microcline | K(AlSi3O8) |
| K | โ Muscovite | KAl2(AlSi3O10)(OH)2 |
| K | โ Nepheline | Na3K(Al4Si4O16) |
| K | โ Potassic-ferro-sadanagaite | {K}{Ca2}{Fe32+Al2}(Al3Si5O22)(OH)2 |
| K | โ Potassic-ferro-ferri-taramite | K(CaNa)(Fe32+Fe23+)(Al2Si6O22)(OH)2 |
| Ca | Calcium | |
| Ca | โ Aegirine-augite | (NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6 |
| Ca | โ Andradite | Ca3Fe23+(SiO4)3 |
| Ca | โ Augite | (CaxMgyFez)(Mgy1Fez1)Si2O6 |
| Ca | โ Calcite | CaCO3 |
| Ca | โ Cancrinite | (Na,Ca,โป)8(Al6Si6O24)(CO3,SO4)2 ยท 2H2O |
| Ca | โ Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| Ca | โ Fluorite | CaF2 |
| Ca | โ Grossular | Ca3Al2(SiO4)3 |
| Ca | โ Hastingsite | NaCa2(Fe42+Fe3+)(Si6Al2)O22(OH)2 |
| Ca | โ Titanite | CaTi(SiO4)O |
| Ca | โ Vesuvianite | Ca19Fe3+Al4(Al6Mg2)(โป4)โป[Si2O7]4[(SiO4)10]O(OH)9 |
| Ca | โ Potassic-ferro-sadanagaite | {K}{Ca2}{Fe32+Al2}(Al3Si5O22)(OH)2 |
| Ca | โ Plagioclase | (Na,Ca)[(Si,Al)AlSi2]O8 |
| Ca | โ Ferro-ferri-sadanagaite | {Na}{Ca2}{Fe32+Fe23+}(Al3Si5O22)(OH)2 |
| Ca | โ Apatite | Ca5(PO4)3(Cl/F/OH) |
| Ca | โ Potassic-ferro-ferri-taramite | K(CaNa)(Fe32+Fe23+)(Al2Si6O22)(OH)2 |
| Ti | Titanium | |
| Ti | โ Amphibole Supergroup | AB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2 |
| Ti | โ Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 |
| Ti | โ Titanite | CaTi(SiO4)O |
| Fe | Iron | |
| Fe | โ Aegirine-augite | (NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6 |
| Fe | โ Andradite | Ca3Fe23+(SiO4)3 |
| Fe | โ Augite | (CaxMgyFez)(Mgy1Fez1)Si2O6 |
| Fe | โ Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 |
| Fe | โ Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| Fe | โ Hastingsite | NaCa2(Fe42+Fe3+)(Si6Al2)O22(OH)2 |
| Fe | โ Vesuvianite | Ca19Fe3+Al4(Al6Mg2)(โป4)โป[Si2O7]4[(SiO4)10]O(OH)9 |
| Fe | โ Potassic-ferro-sadanagaite | {K}{Ca2}{Fe32+Al2}(Al3Si5O22)(OH)2 |
| Fe | โ Ferro-ferri-sadanagaite | {Na}{Ca2}{Fe32+Fe23+}(Al3Si5O22)(OH)2 |
| Fe | โ Potassic-ferro-ferri-taramite | K(CaNa)(Fe32+Fe23+)(Al2Si6O22)(OH)2 |
| Zr | Zirconium | |
| Zr | โ Zircon | Zr(SiO4) |