Cape Ashizuri (Ashizurimisaki), Tosashimizu City, Kochi Prefecture, Japani
| Regional Level Types | |
|---|---|
| Cape Ashizuri (Ashizurimisaki) | Cape |
| Tosashimizu City | City |
| Kochi Prefecture | Prefecture |
| Japan | Country |
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Latitude & Longitude (WGS84):
32° 43' 26'' North , 133° 1' 12'' East
Latitude & Longitude (decimal):
Type:
KΓΆppen climate type:
Mindat Locality ID:
132923
Long-form identifier:
mindat:1:2:132923:3
GUID (UUID V4):
c6e0e36b-12d2-4cca-8cb6-4fd6154d71f9
Miocene alkaline felsic intrusion (syenite), enriched in F, Li, Nb, Ti, Y, REE, Th, Zn, Ba and Zr. Cut by a peralkaline rhyolite dyke with miarolytic cavities. The occurrence is of interest to economic geologists because of the unusual concentration of some of these elements in an unusual (non-pegmatitic) environment. REE content for example is 453 ppm, the highest of any Japanese granitoid rock.
NOTE: This area is part of Ashizuri-Uwakai National Park, so hammering on rocks by mineral collectors would not be appropriate. (There are also a number of prehistoric megalithic sites here, many of which were deliberately and unforgivably destroyed by park landscapers in 1977.)
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsDetailed Mineral List:
| β 'Alkali Feldspar' Reference: Kazuo Nakashima and Teruyoshi Imaoka (1998) Mineralogy and Petrology, 63, #1-2, 1-17. |
| β Chevkinite-(Ce) Formula: Ce4(Ti,Fe2+,Fe3+)5O8(Si2O7)2 Reference: Teruyoshi Imaoka and Kazuo Nakashima (1994) Neues Jahrbuch fuer Mineralogie (Monatshefte), H8, 358-366. |
| β Columbite-(Fe) Formula: Fe2+Nb2O6 Reference: Kazuo Nakashima and Teruyoshi Imaoka (1998) Mineralogy and Petrology, 63, #1-2, 1-17. |
| β 'Fergusonite' Reference: Kazuo Nakashima and Teruyoshi Imaoka (1998) Mineralogy and Petrology, 63, #1-2, 1-17. |
| β Ferriallanite-(Ce) Formula: (CaCe)(Fe3+AlFe2+)O[Si2O7][SiO4](OH) Reference: Nagashima, M., Imaoka, T., and Nakashima, K. (2011): Crystal chemistry of Ti-rich ferriallanite-(Ce) from Cape Ashizuri, Shikoku Island, Japan. American Mineralogist, 96, 1870-1877. |
| β 'Fluocerite' Reference: Teruyoshi Imaoka and Kazuo Nakashima (1994)(1995?) Neues Jahrbuch fuer Mineralogie, H12, 529-539. |
| β Fluorite Formula: CaF2 Reference: Kazuo Nakashima and Teruyoshi Imaoka (1998) Mineralogy and Petrology, 63, #1-2, 1-17. |
| β Ilmenite Formula: Fe2+TiO3 Reference: Kazuo Nakashima and Teruyoshi Imaoka (1998) Mineralogy and Petrology, 63, #1-2, 1-17. |
| β Quartz Formula: SiO2 Reference: Kazuo Nakashima and Teruyoshi Imaoka (1998) Mineralogy and Petrology, 63, #1-2, 1-17. |
| β Rutile Formula: TiO2 Reference: Imaoka & Nakajima (1991) Sanko-Gakkai Kou'en-Youshi, 58. |
| β Rutile var. Ilmenorutile Formula: (Ti,Nb)O2 Reference: Imaoka & Nakajima (1991) Sanko-Gakkai Kou'en-Youshi, 58. |
| β Samarskite-(Y) Formula: YFe3+Nb2O8 Reference: Kazuo Nakashima and Teruyoshi Imaoka (1998) Mineralogy and Petrology, 63, #1-2, 1-17. |
| β Thorite Formula: Th(SiO4) Reference: www.eonet.ne.jp/~isinosyuminoyaka/page004.html |
| β Thorite var. Uranothorite Formula: (Th,U)SiO4 Reference: www.eonet.ne.jp/~isinosyuminoyaka/page004.html |
| β Zircon Formula: Zr(SiO4) Reference: Lapiz specimens (Nagoya) |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 3 - Halides | |||
|---|---|---|---|
| β | Fluorite | 3.AB.25 | CaF2 |
| Group 4 - Oxides and Hydroxides | |||
| β | Columbite-(Fe) | 4.DB.35 | Fe2+Nb2O6 |
| β | Ilmenite | 4.CB.05 | Fe2+TiO3 |
| β | Quartz | 4.DA.05 | SiO2 |
| β | Rutile | 4.DB.05 | TiO2 |
| β | var. Ilmenorutile | 4.DB.05 | (Ti,Nb)O2 |
| β | Samarskite-(Y) | 4.DB.25 | YFe3+Nb2O8 |
| Group 9 - Silicates | |||
| β | Chevkinite-(Ce) | 9.BE.70 | Ce4(Ti,Fe2+,Fe3+)5O8(Si2O7)2 |
| β | Ferriallanite-(Ce) | 9.BG.05b | (CaCe)(Fe3+AlFe2+)O[Si2O7][SiO4](OH) |
| β | Thorite | 9.AD.30 | Th(SiO4) |
| β | var. Uranothorite | 9.AD.30 | (Th,U)SiO4 |
| β | Zircon | 9.AD.30 | Zr(SiO4) |
| Unclassified Minerals, Rocks, etc. | |||
| β | 'Alkali Feldspar' | - | |
| β | 'Fergusonite' | - | |
| β | 'Fluocerite' | - | |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | β Ferriallanite-(Ce) | (CaCe)(Fe3+AlFe2+)O[Si2O7][SiO4](OH) |
| O | Oxygen | |
| O | β Quartz | SiO2 |
| O | β Ilmenite | Fe2+TiO3 |
| O | β Samarskite-(Y) | YFe3+Nb2O8 |
| O | β Columbite-(Fe) | Fe2+Nb2O6 |
| O | β Chevkinite-(Ce) | Ce4(Ti,Fe2+,Fe3+)5O8(Si2O7)2 |
| O | β Thorite var. Uranothorite | (Th,U)SiO4 |
| O | β Rutile var. Ilmenorutile | (Ti,Nb)O2 |
| O | β Zircon | Zr(SiO4) |
| O | β Thorite | Th(SiO4) |
| O | β Rutile | TiO2 |
| O | β Ferriallanite-(Ce) | (CaCe)(Fe3+AlFe2+)O[Si2O7][SiO4](OH) |
| F | Fluorine | |
| F | β Fluorite | CaF2 |
| Al | Aluminium | |
| Al | β Ferriallanite-(Ce) | (CaCe)(Fe3+AlFe2+)O[Si2O7][SiO4](OH) |
| Si | Silicon | |
| Si | β Quartz | SiO2 |
| Si | β Chevkinite-(Ce) | Ce4(Ti,Fe2+,Fe3+)5O8(Si2O7)2 |
| Si | β Thorite var. Uranothorite | (Th,U)SiO4 |
| Si | β Zircon | Zr(SiO4) |
| Si | β Thorite | Th(SiO4) |
| Si | β Ferriallanite-(Ce) | (CaCe)(Fe3+AlFe2+)O[Si2O7][SiO4](OH) |
| Ca | Calcium | |
| Ca | β Fluorite | CaF2 |
| Ca | β Ferriallanite-(Ce) | (CaCe)(Fe3+AlFe2+)O[Si2O7][SiO4](OH) |
| Ti | Titanium | |
| Ti | β Ilmenite | Fe2+TiO3 |
| Ti | β Chevkinite-(Ce) | Ce4(Ti,Fe2+,Fe3+)5O8(Si2O7)2 |
| Ti | β Rutile var. Ilmenorutile | (Ti,Nb)O2 |
| Ti | β Rutile | TiO2 |
| Fe | Iron | |
| Fe | β Ilmenite | Fe2+TiO3 |
| Fe | β Samarskite-(Y) | YFe3+Nb2O8 |
| Fe | β Columbite-(Fe) | Fe2+Nb2O6 |
| Fe | β Chevkinite-(Ce) | Ce4(Ti,Fe2+,Fe3+)5O8(Si2O7)2 |
| Fe | β Ferriallanite-(Ce) | (CaCe)(Fe3+AlFe2+)O[Si2O7][SiO4](OH) |
| Y | Yttrium | |
| Y | β Samarskite-(Y) | YFe3+Nb2O8 |
| Zr | Zirconium | |
| Zr | β Zircon | Zr(SiO4) |
| Nb | Niobium | |
| Nb | β Samarskite-(Y) | YFe3+Nb2O8 |
| Nb | β Columbite-(Fe) | Fe2+Nb2O6 |
| Nb | β Rutile var. Ilmenorutile | (Ti,Nb)O2 |
| Ce | Cerium | |
| Ce | β Chevkinite-(Ce) | Ce4(Ti,Fe2+,Fe3+)5O8(Si2O7)2 |
| Ce | β Ferriallanite-(Ce) | (CaCe)(Fe3+AlFe2+)O[Si2O7][SiO4](OH) |
| Th | Thorium | |
| Th | β Thorite var. Uranothorite | (Th,U)SiO4 |
| Th | β Thorite | Th(SiO4) |
| U | Uranium | |
| U | β Thorite var. Uranothorite | (Th,U)SiO4 |
References
Sort by
Year (asc) Year (desc) Author (A-Z) Author (Z-A)Ishihara Shunso, Tanaka Tsuyoshi, Terashima Shigeru, Togashi Shigeko, Murao Satoshi, Kamioka Hikari (1990): Peralkaline Rhyolite Dikes at the Cape Ashizuri: A New Type of REE and Rare Metal Mineral Resources, Mining Geology, 40, 2 (no. 220), 107-115.
Teruyoshi Imaoka, Kazuo Nakashima, Nobuhide Murakami (1991) Gallium in A-type granites from the Cape Ashizuri, Kochi Prefecture, Southwest Japan. JOURNAL OF MINERALOGY PETROLOGY AND ECONOMIC GEOLOGY, 86(8), 354-363.
Nagashima, M., Imaoka, T. & Nakashima, K. (2011). Crystal chemistry of Ti-rich ferriallanite-(Ce) from Cape Ashizuri, Shikoku Island, Japan. American Mineralogist, 96, 1870-1877.
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