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Dess Au–Ag occurrence, Tyndinsky district, Amur Oblast, Russiai
Regional Level Types
Dess Au–Ag occurrenceOccurrence
Tyndinsky districtDistrict
Amur OblastOblast
RussiaCountry

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Latitude & Longitude (WGS84):
55° 54' 59'' North , 124° 0' 0'' East
Latitude & Longitude (decimal):
55.91667,124.00000
GeoHash:
G#: ycbnjeq41
GRN:
N38E51
Type:
Occurrence
Köppen climate type:
Dwc : Monsoon-influenced subarctic climate
Mindat Locality ID:
456702
Long-form identifier:
mindat:1:2:456702:1
GUID (UUID V4):
0


The orebodies at the Dess occurrence are represented by W–E and N–W trending sulfidized vein–disseminated zones among the beresitized and greisenized porphyraceous granitoid rocks of the Tynda–Bakaran and Tukuringra complexes. The younger dike and volcanic rocks of the Dzhelindakan complex are devoid of this mineralization and hydrothermal metasomatic alteration. In terms of morphology, the orebodies are subdivided into four types: (i) quartz veins with sulfides; (ii) linear zones of fine-veined, vein, and vein–network silicification with sulfides in zones of beresites; (iii) mineralized fracture zones with clay gouge, quartz clasts, and beresitized fragments of granites and gneisses; and (iv) volumetric zones of metasomatic and fine-veined silicification. The maximum gold (up to 10.4 g/t) and silver (5–50 g/t) contents were identified in quartz veins that occur as latitudinal band and lens shaped bodies 0.1to 2.5 m thick with flexures by strike and, probably, downdips.

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Standard Detailed Gallery Strunz Chemical Elements

Commodity List

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


Mineral List


6 valid minerals.

Rock Types Recorded

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

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Alphabetical List Tree Diagram

Detailed Mineral List:

ⓘ Galena
Formula: PbS
ⓘ 'Limonite'
ⓘ Molybdenite
Formula: MoS2
ⓘ Muscovite
Formula: KAl2(AlSi3O10)(OH)2
ⓘ Muscovite var. Sericite
Formula: KAl2(AlSi3O10)(OH)2
ⓘ Native Gold
Formula: Au
ⓘ 'Ochre'
ⓘ Pyrite
Formula: FeS2
ⓘ Quartz
Formula: SiO2

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
ⓘNative Gold1.AA.05Au
Group 2 - Sulphides and Sulfosalts
ⓘGalena2.CD.10PbS
ⓘMolybdenite2.EA.30MoS2
ⓘPyrite2.EB.05aFeS2
Group 4 - Oxides and Hydroxides
ⓘQuartz4.DA.05SiO2
Group 9 - Silicates
ⓘMuscovite9.EC.15KAl2(AlSi3O10)(OH)2
ⓘvar. Sericite9.EC.15KAl2(AlSi3O10)(OH)2
Unclassified
ⓘ'Limonite'-
ⓘ'Ochre'-

List of minerals for each chemical element

HHydrogen
Hⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Hⓘ Muscovite var. SericiteKAl2(AlSi3O10)(OH)2
OOxygen
Oⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Oⓘ QuartzSiO2
Oⓘ Muscovite var. SericiteKAl2(AlSi3O10)(OH)2
AlAluminium
Alⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Alⓘ Muscovite var. SericiteKAl2(AlSi3O10)(OH)2
SiSilicon
Siⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Siⓘ QuartzSiO2
Siⓘ Muscovite var. SericiteKAl2(AlSi3O10)(OH)2
SSulfur
Sⓘ GalenaPbS
Sⓘ MolybdeniteMoS2
Sⓘ PyriteFeS2
KPotassium
Kⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Kⓘ Muscovite var. SericiteKAl2(AlSi3O10)(OH)2
FeIron
Feⓘ PyriteFeS2
MoMolybdenum
Moⓘ MolybdeniteMoS2
AuGold
Auⓘ Native GoldAu
PbLead
Pbⓘ GalenaPbS

Other Regions, Features and Areas containing this locality

Amur PlateTectonic Plate
AsiaContinent
Eurasian Plate
Soviet Union (1922-1991)Country

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

[1]Buchko, I. V., Sorokin, A. A., Ponomarchuk, V. A., Travin, A. V., Buchko, Ir. V. (2012) Age of the Au-Ag mineralization and its relation to the magmatism at the Dess occurrence, North Stanovaya metallogenic zone (southeastern framing of the North-Asian Craton) Russian Journal of Pacific Geology, 6 (2) 158-163 doi:10.1134/s1819714012020029
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