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Saxi Scheelite and Emerald Mine, Dayakou Hill, Mengdong Township, Malipo County, Wenshan, Yunnan, Chinai
Regional Level Types
Saxi Scheelite and Emerald MineMine (Active)
Dayakou Hill- not defined -
Mengdong TownshipTownship
Malipo CountyCounty
WenshanPrefecture
YunnanProvince
ChinaCountry

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Latitude & Longitude (WGS84):
22° 55' 41'' North , 104° 41' 48'' East
Latitude & Longitude (decimal):
Type:
Mine (Active) - last checked 2020
Nearest Settlements:
PlacePopulationDistance
Mabai63,569 (2012)26.9km
Thành Phố Hà Giang32,690 (2013)31.6km
Kaihua64,404 (2013)65.2km
Wenshan City450,000 (2018)66.5km
Mindat Locality ID:
131695
Long-form identifier:
mindat:1:2:131695:0
GUID (UUID V4):
0
Other/historical names associated with this locality:
Saxi W-Be deposit; "Dayakou emerald mine"; "Dayakou emerald deposit";


Skarn-type tungsten (scheelite) deposit.
Reserves: 0.011 Mt WO3.
Emerald-bearing quartz and pegmatite veins, hosted in Cambrian metamorphic rocks at the eastern contact of the Yanshannian Laojunshan granite. The veins were intruded during the Cretaceous.

NOTE (comment by Hans-Jürgen Haas): According to a geologist at Nanjing University there is no "Dayakou Emerald Mine". The correct name is Saxi Scheelite and Emerald Mine, Dayakou Hill, Mengdong Township, Malipo County, Wenshan Prefecture, Yunnan Province. The Saxi Mine is an underground mine, but could also have small old open pits. In his opinion all emeralds are from the Saxi Scheelite and Emerald Mine.
See also the Chinese geological map https://www.mindat.org/photo-1167570.html.

05890990017272256485114.jpg
Dayakou Geo Map


The exposed strata in the W-Be mining district belong to the Paleoproterozoic Mengdong Group, which comprises the Nanyangtian Formation and Saxi Formation. The Saxi Formation, hosting the majority of W-Be mineralization, consists of biotite granulite, two-mica schist, and quartzite, with minor leptynite and plagioclase amphibolite. The ore bodies exhibit stratiform, para-bedded, and vein-type geometries. Stratiform and para-bedded scheelite ores are conformable to bedding within biotite granulite, whereas vein-type mineralization, including feldspar-quartz veins, beryl-quartz veins and tourmaline-quartz veins are parallel to or crosscut the bedding.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List


18 valid minerals.

Rock Types Recorded


Select Rock List Type

Alphabetical List Tree Diagram

Detailed Mineral List:

Actinolite
Formula: ◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Albite
Formula: Na(AlSi3O8)
'Apatite'
Formula: Ca5(PO4)3A
Arsenopyrite
Formula: FeAsS
Beryl
Formula: Be3Al2(Si6O18)
References:
Beryl var. Emerald
Formula: Be3Al2(Si6O18)
'Biotite'
Formula: K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
References:
Calcite
Formula: CaCO3
'Chlorite Group'
References:
Epidote
Formula: (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
'Epidote Group'
Formula: (A12+A22+)(M13+M23+M33+)O[Si2O7][SiO4](OH)
'Feldspar Group'
Fluorite
Formula: CaF2
References:
'K Feldspar'
Muscovite
Formula: KAl2(AlSi3O10)(OH)2
References:
Muscovite var. Fuchsite
Formula: K(Al,Cr)3Si3O10(OH)2
Orthoclase
Formula: K(AlSi3O8)
Oxy-dravite
Formula: Na(Al2Mg)(Al5Mg)(Si6O18)(BO3)3(OH)3O
Oxy-schorl
Formula: Na(Fe2+2Al)Al6(Si6O18)(BO3)3(OH)3O
Phlogopite
Formula: KMg3(AlSi3O10)(OH)2
'Plagioclase'
Formula: (Na,Ca)[(Si,Al)AlSi2]O8
Pyrite
Formula: FeS2
Pyrrhotite
Formula: Fe1-xS
Quartz
Formula: SiO2
References:
Scheelite
Formula: Ca(WO4)
References:
Titanite
Formula: CaTiO(SiO4)
'Tourmaline'
Formula: AD3G6(T6O18)(BO3)3X3Z
References:
Tremolite
Formula: ◻Ca2Mg5(Si8O22)(OH)2

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
Pyrrhotite2.CC.10Fe1-xS
Pyrite2.EB.05aFeS2
Arsenopyrite2.EB.20FeAsS
Group 3 - Halides
Fluorite3.AB.25CaF2
Group 4 - Oxides and Hydroxides
Quartz4.DA.05SiO2
Group 5 - Nitrates and Carbonates
Calcite5.AB.05CaCO3
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
Scheelite7.GA.05Ca(WO4)
Group 9 - Silicates
Titanite9.AG.15CaTiO(SiO4)
Epidote9.BG.05a(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Beryl9.CJ.05Be3Al2(Si6O18)
var. Emerald9.CJ.05Be3Al2(Si6O18)
Oxy-dravite9.CK.05Na(Al2Mg)(Al5Mg)(Si6O18)(BO3)3(OH)3O
Oxy-schorl9.CK.05Na(Fe2+2Al)Al6(Si6O18)(BO3)3(OH)3O
Actinolite9.DE.10◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Tremolite9.DE.10◻Ca2Mg5(Si8O22)(OH)2
Muscovite
var. Fuchsite
9.EC.15K(Al,Cr)3Si3O10(OH)2
9.EC.15KAl2(AlSi3O10)(OH)2
Phlogopite9.EC.20KMg3(AlSi3O10)(OH)2
Orthoclase9.FA.30K(AlSi3O8)
Albite9.FA.35Na(AlSi3O8)
Unclassified
'Biotite'-K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
'Chlorite Group'-
'Feldspar Group'-
'Tourmaline'-AD3G6(T6O18)(BO3)3X3Z
'Plagioclase'-(Na,Ca)[(Si,Al)AlSi2]O8
'K Feldspar'-
'Apatite'-Ca5(PO4)3A
'Epidote Group'-(A12+A22+)(M13+M23+M33+)O[Si2O7][SiO4](OH)

List of minerals for each chemical element

HHydrogen
H Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
H BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
H Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
H Muscovite var. FuchsiteK(Al,Cr)3Si3O10(OH)2
H MuscoviteKAl2(AlSi3O10)(OH)2
H PhlogopiteKMg3(AlSi3O10)(OH)2
H Tremolite◻Ca2Mg5(Si8O22)(OH)2
H Oxy-draviteNa(Al2Mg)(Al5Mg)(Si6O18)(BO3)3(OH)3O
H Oxy-schorlNa(Fe22+Al)Al6(Si6O18)(BO3)3(OH)3O
H Epidote Group(A12+A22+)(M13+M23+M33+)O[Si2O7][SiO4](OH)
BeBeryllium
Be BerylBe3Al2(Si6O18)
Be Beryl var. EmeraldBe3Al2(Si6O18)
BBoron
B TourmalineAD3G6(T6O18)(BO3)3X3Z
B Oxy-draviteNa(Al2Mg)(Al5Mg)(Si6O18)(BO3)3(OH)3O
B Oxy-schorlNa(Fe22+Al)Al6(Si6O18)(BO3)3(OH)3O
CCarbon
C CalciteCaCO3
OOxygen
O Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
O AlbiteNa(AlSi3O8)
O BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
O BerylBe3Al2(Si6O18)
O CalciteCaCO3
O Beryl var. EmeraldBe3Al2(Si6O18)
O Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
O Muscovite var. FuchsiteK(Al,Cr)3Si3O10(OH)2
O MuscoviteKAl2(AlSi3O10)(OH)2
O OrthoclaseK(AlSi3O8)
O PhlogopiteKMg3(AlSi3O10)(OH)2
O QuartzSiO2
O ScheeliteCa(WO4)
O TitaniteCaTiO(SiO4)
O TourmalineAD3G6(T6O18)(BO3)3X3Z
O Tremolite◻Ca2Mg5(Si8O22)(OH)2
O Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
O Oxy-draviteNa(Al2Mg)(Al5Mg)(Si6O18)(BO3)3(OH)3O
O ApatiteCa5(PO4)3A
O Oxy-schorlNa(Fe22+Al)Al6(Si6O18)(BO3)3(OH)3O
O Epidote Group(A12+A22+)(M13+M23+M33+)O[Si2O7][SiO4](OH)
FFluorine
F BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
F FluoriteCaF2
NaSodium
Na AlbiteNa(AlSi3O8)
Na Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
Na Oxy-draviteNa(Al2Mg)(Al5Mg)(Si6O18)(BO3)3(OH)3O
Na Oxy-schorlNa(Fe22+Al)Al6(Si6O18)(BO3)3(OH)3O
MgMagnesium
Mg Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Mg BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Mg PhlogopiteKMg3(AlSi3O10)(OH)2
Mg Tremolite◻Ca2Mg5(Si8O22)(OH)2
Mg Oxy-draviteNa(Al2Mg)(Al5Mg)(Si6O18)(BO3)3(OH)3O
AlAluminium
Al AlbiteNa(AlSi3O8)
Al BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Al BerylBe3Al2(Si6O18)
Al Beryl var. EmeraldBe3Al2(Si6O18)
Al Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Al Muscovite var. FuchsiteK(Al,Cr)3Si3O10(OH)2
Al MuscoviteKAl2(AlSi3O10)(OH)2
Al OrthoclaseK(AlSi3O8)
Al PhlogopiteKMg3(AlSi3O10)(OH)2
Al Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
Al Oxy-draviteNa(Al2Mg)(Al5Mg)(Si6O18)(BO3)3(OH)3O
Al Oxy-schorlNa(Fe22+Al)Al6(Si6O18)(BO3)3(OH)3O
SiSilicon
Si Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Si AlbiteNa(AlSi3O8)
Si BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Si BerylBe3Al2(Si6O18)
Si Beryl var. EmeraldBe3Al2(Si6O18)
Si Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Si Muscovite var. FuchsiteK(Al,Cr)3Si3O10(OH)2
Si MuscoviteKAl2(AlSi3O10)(OH)2
Si OrthoclaseK(AlSi3O8)
Si PhlogopiteKMg3(AlSi3O10)(OH)2
Si QuartzSiO2
Si TitaniteCaTiO(SiO4)
Si Tremolite◻Ca2Mg5(Si8O22)(OH)2
Si Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
Si Oxy-draviteNa(Al2Mg)(Al5Mg)(Si6O18)(BO3)3(OH)3O
Si Oxy-schorlNa(Fe22+Al)Al6(Si6O18)(BO3)3(OH)3O
Si Epidote Group(A12+A22+)(M13+M23+M33+)O[Si2O7][SiO4](OH)
PPhosphorus
P ApatiteCa5(PO4)3A
SSulfur
S ArsenopyriteFeAsS
S PyriteFeS2
S PyrrhotiteFe1-xS
KPotassium
K BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
K Muscovite var. FuchsiteK(Al,Cr)3Si3O10(OH)2
K MuscoviteKAl2(AlSi3O10)(OH)2
K OrthoclaseK(AlSi3O8)
K PhlogopiteKMg3(AlSi3O10)(OH)2
CaCalcium
Ca Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Ca CalciteCaCO3
Ca Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Ca FluoriteCaF2
Ca ScheeliteCa(WO4)
Ca TitaniteCaTiO(SiO4)
Ca Tremolite◻Ca2Mg5(Si8O22)(OH)2
Ca Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
Ca ApatiteCa5(PO4)3A
TiTitanium
Ti BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Ti TitaniteCaTiO(SiO4)
CrChromium
Cr Muscovite var. FuchsiteK(Al,Cr)3Si3O10(OH)2
FeIron
Fe Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Fe ArsenopyriteFeAsS
Fe BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Fe Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Fe PyriteFeS2
Fe PyrrhotiteFe1-xS
Fe Oxy-schorlNa(Fe22+Al)Al6(Si6O18)(BO3)3(OH)3O
AsArsenic
As ArsenopyriteFeAsS
WTungsten
W ScheeliteCa(WO4)

Other Regions, Features and Areas containing this locality

AsiaContinent
China
Eurasian PlateTectonic Plate

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