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It's a showdown with rare earth elemental ore Monazite-(Ce) and index mineral Andalusite.
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Illite from
Mianchi area, Mianchi County, Sanmenxia, Henan, China


Locality type:Exploration Area
Classification
Species:Muscovite var: Illite
Formula:K0.65Al2.0[Al0.65Si3.35O10](OH)2
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Illite data
Locality Data:Click here to view Mianchi area, Mianchi County, Sanmenxia, Henan, China
Data Identifiers
Mindat Occurrence Record ID:1805537
Long-form Identifier:1:3:1805537:9
GUID (UUID V4):0
Nearest other occurrences of Illite
14.8km (9.2 miles) ⓘGuangou Mine, Mianchi County, Sanmenxia, Henan, China
34.7km (21.6 miles) ⓘDujiagou bauxite deposit, Luoning County, Luoyang, Henan, China
83.9km (52.2 miles) ⓘXiaonangou Au deposit, Dongwan gold field, Song County, Luoyang, Henan, China
84.1km (52.3 miles) ⓘLongmeng Mine, Tieluping ore field, Luoning County, Luoyang, Henan, China
85.2km (52.9 miles) ⓘHaopinggou Mine, Tieluping ore field, Luoning County, Luoyang, Henan, China
91.8km (57.1 miles) ⓘHongzhuang Au deposit, Shizimiao Au-Mo ore field, Luanchuan County, Luoyang, Henan, China
93.7km (58.2 miles) ⓘYuanling Au deposit, Shizimiao Au-Mo ore field, Luanchuan County, Luoyang, Henan, China
References
Wang, Ruixue; Ramanaidou, Erick; Kirkland, Christopher L.; Pejcic, Bobby; Laukamp, Carsten; Verrall, Michael; Schoneveld, Louise E.; Owen, Nick; Huang, Shu; Bath, Adam; et al. (2025) Genesis of cookeite, the primary lithium mineral in the Late Carboniferous strata of the North China Craton. Ore Geology Reviews, 186. 106903 doi:10.1016/j.oregeorev.2025.106903
 
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