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Yichun complex (Yashan batholith), Yuanzhou District, Yichun Prefecture, Jiangxi Province, China

Coarse-grained, protolithionite-muscovite granite with a finer grained muscovite granite margin (Yashan batholith), intruded by small bodies of muscovite granite which form the locus of a tungsten vein system at the Xinfang tungsten mine. Two sheetlike bodies, a lower lithium mica granite and an upper topaz-lepidolite granite intrude the upper contact between the protolithionite-muscovite granite and the host metasediments. The granites are crosscut by unmineralized porphyry dikes that are exploited as a source of kaolin. The topaz-lepidolite granite is a major, low-grade Ta-Nb-Li deposit which is exploited via open-pit mining.

References

- Lin Yin, Pollard, P.J., Hu Shouxi, and Taylor, R.G. (1995): Geologic and geochemical characteristics of the Yichun Ta-Nb-Li deposit, Jiangxi Province, South China. Economic Geology 90(3), 577-585.
- Huan Hu, Rucheng Wang, Aicheng Zhang, Xiaolong Huang, Changshi Liu, and Shijin Xu (2003): Electron microprobe study of Cs minerals in the Yashan topaz lepidolite granite, Jiangxi Province. Geochimica 32(1), 62-74.

Mineral List

Mineral list contains entries from the region specified including sub-localities
Albite
var: Oligoclase
Amblygonite
Beryl
Beryllonite
Brazilianite
Cassiterite
Chalcopyrite
'Chlorite Group'
Columbite-(Mn)
Eucryptite
Fluorapatite
Fluorapatite
var: Mn-bearing Fluorapatite

Fluorite
'Garnet'
Gibbsite
Herderite
Hydroxylherderite
Ilmenite
Kaolinite
'K Feldspar'
Lepidolite
Microcline
Microlite Group
Molybdenite
'Monazite'
Montebrasite
Muscovite
Pollucite
Protolithionite
Pyrite
Quartz
Rutile
Sphalerite
Stannite
Tantalite-(Mn)
Thorite
Titanowodginite
Topaz
'Tourmaline'
Triplite
UM2004-49-SiO:AlCsFHKLi
Wodginite
Wolframite
Xenotime-(Y)
Zinnwaldite
Zircon
var: Hafnian Zircon


48 entries listed. 36 valid minerals.

Localities in this Region

China

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Copyright © Jolyon Ralph and Ida Chau 1993-2011. Jobs in China Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them. Further information contact the Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of hundreds of members and supporters. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register.
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