The occurrence and composition of chevkinite-(Ce) and perrierite-(Ce) in tholeiitic intrusive rocks and lunar mare basalt
Chevkinite-(Ce) and perrierite-(Ce) are the most common members of the chevkinite group of minerals. They are dimorphs, and both have the general formula A4BC2D2Si4O22, where A = REE, Y, Ca, Sr, Th; B = Fe2+, (Mn, Mg); C = Ti, Al, Fe3+, Fe2+, Cr, Mn, Mg, Zr, Hf, Nb; and D = Ti. Both have been report...
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| Format: | Journal Article |
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Mineralogical Society of America
2014
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| Online Access: | http://hdl.handle.net/20.500.11937/30563 |
| _version_ | 1848753124298194944 |
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| author | Muhling, Janet Suvorova, A. Rasmussen, Birger |
| author_facet | Muhling, Janet Suvorova, A. Rasmussen, Birger |
| author_sort | Muhling, Janet |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | Chevkinite-(Ce) and perrierite-(Ce) are the most common members of the chevkinite group of minerals. They are dimorphs, and both have the general formula A4BC2D2Si4O22, where A = REE, Y, Ca, Sr, Th; B = Fe2+, (Mn, Mg); C = Ti, Al, Fe3+, Fe2+, Cr, Mn, Mg, Zr, Hf, Nb; and D = Ti. Both have been reported from a wide range of igneous, metamorphic, and hydrothermal rocks types, but occurrences in mafic rocks are rare, with minimal chemical and crystallographic documentation. Chevkinite-(Ce) and/or perrierite-(Ce) occur with other Ti-, Zr-, and REE-bearing accessory phases in eight suites of tholeiitic dolerite from Western Australia, and in lunar mare basalt 10047. They are more abundant than has been recognized previously in mafic igneous rocks, and they are significant hosts of incompatible elements. Chevkinite-(Ce) and perrierite-(Ce) from mafic rocks have distinctive chemical compositions with higher Zr than recorded in examples from most other common rock types. Among mafic rocks, two groups are recognized based on total Fe contents in electron microprobe analyses: crystal structural analysis by electron diffraction indicates that the high-Fe group (>8 wt% FeO) is chevkinite-(Ce), while the low-Fe group (<8 wt% FeO) is consistent with perrierite-(Ce), and both minerals can occur within a single hand specimen. A previously proposed chemical discriminant is not applicable to chevkinite-group minerals from typical mafic igneous rocks and crystal structural information is required to unequivocally distinguish between the two dimorphs. |
| first_indexed | 2025-11-14T08:19:31Z |
| format | Journal Article |
| id | curtin-20.500.11937-30563 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T08:19:31Z |
| publishDate | 2014 |
| publisher | Mineralogical Society of America |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-305632017-10-02T02:28:14Z The occurrence and composition of chevkinite-(Ce) and perrierite-(Ce) in tholeiitic intrusive rocks and lunar mare basalt Muhling, Janet Suvorova, A. Rasmussen, Birger tholeiitic dolerite lunar mare basalt Chevkinite perrierite electron diffraction chemical (mineral) analysis Chevkinite-(Ce) and perrierite-(Ce) are the most common members of the chevkinite group of minerals. They are dimorphs, and both have the general formula A4BC2D2Si4O22, where A = REE, Y, Ca, Sr, Th; B = Fe2+, (Mn, Mg); C = Ti, Al, Fe3+, Fe2+, Cr, Mn, Mg, Zr, Hf, Nb; and D = Ti. Both have been reported from a wide range of igneous, metamorphic, and hydrothermal rocks types, but occurrences in mafic rocks are rare, with minimal chemical and crystallographic documentation. Chevkinite-(Ce) and/or perrierite-(Ce) occur with other Ti-, Zr-, and REE-bearing accessory phases in eight suites of tholeiitic dolerite from Western Australia, and in lunar mare basalt 10047. They are more abundant than has been recognized previously in mafic igneous rocks, and they are significant hosts of incompatible elements. Chevkinite-(Ce) and perrierite-(Ce) from mafic rocks have distinctive chemical compositions with higher Zr than recorded in examples from most other common rock types. Among mafic rocks, two groups are recognized based on total Fe contents in electron microprobe analyses: crystal structural analysis by electron diffraction indicates that the high-Fe group (>8 wt% FeO) is chevkinite-(Ce), while the low-Fe group (<8 wt% FeO) is consistent with perrierite-(Ce), and both minerals can occur within a single hand specimen. A previously proposed chemical discriminant is not applicable to chevkinite-group minerals from typical mafic igneous rocks and crystal structural information is required to unequivocally distinguish between the two dimorphs. 2014 Journal Article http://hdl.handle.net/20.500.11937/30563 10.2138/am-2014-4690 Mineralogical Society of America restricted |
| spellingShingle | tholeiitic dolerite lunar mare basalt Chevkinite perrierite electron diffraction chemical (mineral) analysis Muhling, Janet Suvorova, A. Rasmussen, Birger The occurrence and composition of chevkinite-(Ce) and perrierite-(Ce) in tholeiitic intrusive rocks and lunar mare basalt |
| title | The occurrence and composition of chevkinite-(Ce) and perrierite-(Ce) in tholeiitic intrusive rocks and lunar mare basalt |
| title_full | The occurrence and composition of chevkinite-(Ce) and perrierite-(Ce) in tholeiitic intrusive rocks and lunar mare basalt |
| title_fullStr | The occurrence and composition of chevkinite-(Ce) and perrierite-(Ce) in tholeiitic intrusive rocks and lunar mare basalt |
| title_full_unstemmed | The occurrence and composition of chevkinite-(Ce) and perrierite-(Ce) in tholeiitic intrusive rocks and lunar mare basalt |
| title_short | The occurrence and composition of chevkinite-(Ce) and perrierite-(Ce) in tholeiitic intrusive rocks and lunar mare basalt |
| title_sort | occurrence and composition of chevkinite-(ce) and perrierite-(ce) in tholeiitic intrusive rocks and lunar mare basalt |
| topic | tholeiitic dolerite lunar mare basalt Chevkinite perrierite electron diffraction chemical (mineral) analysis |
| url | http://hdl.handle.net/20.500.11937/30563 |