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Boka Au deposit, Dongchuan District, Kunming, Yunnan, Chinai
Regional Level Types
Boka Au depositDeposit
Dongchuan DistrictDistrict
KunmingPrefecture-level City
YunnanProvince
ChinaCountry

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Latitude & Longitude (WGS84):
26° 23' 29'' North , 103° 0' 57'' East
Latitude & Longitude (decimal):
26.39139,103.01611
GRN:
N18E66
Type:
Deposit
Köppen climate type:
Cwb : Subtropical highland climate or temperate oceanic climate with dry winters
Mindat Locality ID:
134601
Long-form identifier:
mindat:1:2:134601:8
GUID (UUID V4):
0
Name(s) in local language(s):
播卡金矿, 东川区, 昆明市, 云南省, 中国


Stratiform gold mineralizations, occurring within a series of Proterozoic age carbonaceous shales, sandstones, and siltstones interpreted to have been subject to regional-scale folding, low-angle thrust faulting, shearing and ductile-brittle deformation.

The Boka gold deposit is located in the northern segment of the Kangdian metallogenic province on the western edge of the Yangtze Block, has an estimated Au reserve of 20 tons with an average grade of 1.6 g/t. The exposed strata in the deposit are composed of the Mesoproterozoic Kunyang Group overlain by Neogene strata. The Kunyang Group consists of slates, carbonaceous slates, and carbonate rocks (dolostones), which are subdivided into the Dayingpan Formation, Yinmin Formation, Luoxue Formation, Heishan Formation, and Pingdingshan Formation from bottom to top. The ore-hosting strata are primarily the Luoxue, Yinmin, and Heishan formations, which are composed of carbonaceous slates. The Lower Kunyang Group is mainly exposed the core of the overturned anticline in the Tuobuka complex, with a thickness of up to 500 m. The Middle and Upper Kunyang Group strata are exposed on both limbs of the anticline, with a maximum thickness of up to 3000 m. In the Boka gold deposit, magmatic rocks exposed in the Heishan and Luoxue groups are dominantly diabase, with albitization alteration zones characteristically developed at their tops.
The Boka gold deposit comprises 16 ore bodies, with eight ore bodies in each of the Xinshan and Majiagou mining sections. The orebodies show approximately N–S-trending and dip eastward at angles of 20°–70°, aligning closely with the emplacement orientation of the host rock masses. Their distribution is structurally controlled by shear-fractured zones bounded by the F3 and F4 faults, exhibiting linear alignment patterns. These ore bodies generally exhibit stratiform, lenticular, or vein-type morphologies. Ore bodies occur within fractured zones at the contact between diabase and strata, albitization alteration zones, and carbonaceous slate overlying albitized diabase alteration zone.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Commodity List

This is a list of exploitable or exploited mineral commodities recorded at this locality.


Mineral List


17 valid minerals.

Rock Types Recorded

Note: data is currently VERY limited. Please bear with us while we work towards adding this information!

Select Rock List Type

Alphabetical List Tree Diagram

Detailed Mineral List:

ⓘ Albite
Formula: Na(AlSi3O8)
ⓘ Ankerite
Formula: Ca(Fe2+,Mg)(CO3)2
ⓘ 'Biotite'
Formula: K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
ⓘ Calcite
Formula: CaCO3
ⓘ Chalcopyrite
Formula: CuFeS2
ⓘ 'Chlorite Group'
ⓘ Dolomite
Formula: CaMg(CO3)2
ⓘ Galena
Formula: PbS
ⓘ Gersdorffite
Formula: NiAsS
ⓘ Kaolinite
Formula: Al2(Si2O5)(OH)4
ⓘ 'Limonite'
ⓘ Millerite
Formula: NiS
ⓘ Muscovite
Formula: KAl2(AlSi3O10)(OH)2
ⓘ Muscovite var. Sericite
Formula: KAl2(AlSi3O10)(OH)2
ⓘ Native Gold
Formula: Au
ⓘ Native Gold var. Electrum
Formula: (Au,Ag)
ⓘ 'Plagioclase'
Formula: (Na,Ca)[(Si,Al)AlSi2]O8
ⓘ Pyrite
Formula: FeS2
ⓘ 'Pyroxene Group'
Formula: ADSi2O6
ⓘ Quartz
Formula: SiO2
ⓘ Rutile
Formula: TiO2
ⓘ Siderite
Formula: FeCO3
ⓘ Sphalerite
Formula: ZnS
ⓘ Sylvanite
Formula: AgAuTe4
ⓘ 'Tourmaline'
Formula: AD3G6(T6O18)(BO3)3X3Z

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
ⓘNative Gold
var. Electrum		1.AA.05(Au,Ag)
ⓘ1.AA.05Au
Group 2 - Sulphides and Sulfosalts
ⓘSphalerite2.CB.05aZnS
ⓘChalcopyrite2.CB.10aCuFeS2
ⓘMillerite2.CC.20NiS
ⓘGalena2.CD.10PbS
ⓘSylvanite2.EA.05AgAuTe4
ⓘPyrite2.EB.05aFeS2
ⓘGersdorffite2.EB.25NiAsS
Group 4 - Oxides and Hydroxides
ⓘQuartz4.DA.05SiO2
ⓘRutile4.DB.05TiO2
Group 5 - Nitrates and Carbonates
ⓘCalcite5.AB.05CaCO3
ⓘSiderite5.AB.05FeCO3
ⓘAnkerite5.AB.10Ca(Fe2+,Mg)(CO3)2
ⓘDolomite5.AB.10CaMg(CO3)2
Group 9 - Silicates
ⓘMuscovite9.EC.15KAl2(AlSi3O10)(OH)2
ⓘvar. Sericite9.EC.15KAl2(AlSi3O10)(OH)2
ⓘKaolinite9.ED.05Al2(Si2O5)(OH)4
ⓘAlbite9.FA.35Na(AlSi3O8)
Unclassified
ⓘ'Biotite'-K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
ⓘ'Chlorite Group'-
ⓘ'Limonite'-
ⓘ'Tourmaline'-AD3G6(T6O18)(BO3)3X3Z
ⓘ'Plagioclase'-(Na,Ca)[(Si,Al)AlSi2]O8
ⓘ'Pyroxene Group'-ADSi2O6

List of minerals for each chemical element

HHydrogen
Hⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Hⓘ KaoliniteAl2(Si2O5)(OH)4
Hⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Hⓘ Muscovite var. SericiteKAl2(AlSi3O10)(OH)2
BBoron
Bⓘ TourmalineAD3G6(T6O18)(BO3)3X3Z
CCarbon
Cⓘ AnkeriteCa(Fe2+,Mg)(CO3)2
Cⓘ CalciteCaCO3
Cⓘ DolomiteCaMg(CO3)2
Cⓘ SideriteFeCO3
OOxygen
Oⓘ AlbiteNa(AlSi3O8)
Oⓘ AnkeriteCa(Fe2+,Mg)(CO3)2
Oⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Oⓘ CalciteCaCO3
Oⓘ DolomiteCaMg(CO3)2
Oⓘ KaoliniteAl2(Si2O5)(OH)4
Oⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Oⓘ QuartzSiO2
Oⓘ RutileTiO2
Oⓘ SideriteFeCO3
Oⓘ TourmalineAD3G6(T6O18)(BO3)3X3Z
Oⓘ Muscovite var. SericiteKAl2(AlSi3O10)(OH)2
Oⓘ Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
Oⓘ Pyroxene GroupADSi2O6
FFluorine
Fⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
NaSodium
Naⓘ AlbiteNa(AlSi3O8)
Naⓘ Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
MgMagnesium
Mgⓘ AnkeriteCa(Fe2+,Mg)(CO3)2
Mgⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Mgⓘ DolomiteCaMg(CO3)2
AlAluminium
Alⓘ AlbiteNa(AlSi3O8)
Alⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Alⓘ KaoliniteAl2(Si2O5)(OH)4
Alⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Alⓘ Muscovite var. SericiteKAl2(AlSi3O10)(OH)2
Alⓘ Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
SiSilicon
Siⓘ AlbiteNa(AlSi3O8)
Siⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Siⓘ KaoliniteAl2(Si2O5)(OH)4
Siⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Siⓘ QuartzSiO2
Siⓘ Muscovite var. SericiteKAl2(AlSi3O10)(OH)2
Siⓘ Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
Siⓘ Pyroxene GroupADSi2O6
SSulfur
Sⓘ ChalcopyriteCuFeS2
Sⓘ GalenaPbS
Sⓘ GersdorffiteNiAsS
Sⓘ MilleriteNiS
Sⓘ PyriteFeS2
Sⓘ SphaleriteZnS
KPotassium
Kⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Kⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Kⓘ Muscovite var. SericiteKAl2(AlSi3O10)(OH)2
CaCalcium
Caⓘ AnkeriteCa(Fe2+,Mg)(CO3)2
Caⓘ CalciteCaCO3
Caⓘ DolomiteCaMg(CO3)2
Caⓘ Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
TiTitanium
Tiⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Tiⓘ RutileTiO2
FeIron
Feⓘ AnkeriteCa(Fe2+,Mg)(CO3)2
Feⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Feⓘ ChalcopyriteCuFeS2
Feⓘ PyriteFeS2
Feⓘ SideriteFeCO3
NiNickel
Niⓘ GersdorffiteNiAsS
Niⓘ MilleriteNiS
CuCopper
Cuⓘ ChalcopyriteCuFeS2
ZnZinc
Znⓘ SphaleriteZnS
AsArsenic
Asⓘ GersdorffiteNiAsS
AgSilver
Agⓘ Native Gold var. Electrum(Au,Ag)
Agⓘ SylvaniteAgAuTe4
TeTellurium
Teⓘ SylvaniteAgAuTe4
AuGold
Auⓘ Native Gold var. Electrum(Au,Ag)
Auⓘ Native GoldAu
Auⓘ SylvaniteAgAuTe4
PbLead
Pbⓘ GalenaPbS

Other Regions, Features and Areas containing this locality

AsiaContinent
China
Eurasian PlateTectonic Plate

This page contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.

References

sec.edgar-online.com (n.d.) http://sec.edgar-online.com/southwestern-resources-corp/6-k-report-of-foreign-issuer/2007/11/13/section3.aspx
Board, W.S., Trueman, A.M., and Hawthorn, G.W. (2007): Mineral Resource Update, Boka Gold Project, Yunnan Province, P.R.C. Form 43-101F1 Report for Southwestern Resources Corp.
Fuqiang Wu and Shengyue Liang (2011): Research on metallogenic regularity of Boka gold deposit in Yunnan Province. Gold Science and Technology 19(1), 1-5 (in Chinese with English abstract).
[1]Ren, Hongyu; Li, Chao; Yan, Qinggao; Jiang, Xiaojun; Zhang, Hao; Zhang, Jihao; Yu, Pengyue; Liu, Zeqi (2025) Genesis of the Boka vein-type Au deposit, Dongchuan, southwestern China: Insights from rutile U–Pb dating and pyrite chemistry. Ore Geology Reviews, 184. 106716 doi:10.1016/j.oregeorev.2025.106716
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