Xinglongshan Ore Block, Shuangjianzishan Ag-polymetallic deposit, Bairin Left Banner (Balin Zuoqi), Chifeng City (Ulanhad League; Chifeng Prefecture), Inner Mongolia, Chinai
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Latitude & Longitude (WGS84):
44° 26' 58'' North , 118° 52' 51'' East
Latitude & Longitude (decimal):
Type:
KΓΆppen climate type:
Mindat Locality ID:
439914
Long-form identifier:
mindat:1:2:439914:1
GUID (UUID V4):
e2b87298-9c1b-4d19-b26c-a1e20ccf57c0
The exposed strata in the Xinglongshan ore block include the LowerβMiddle Permian Dashizhai Formation, Middle Jurassic Xinmin Formation, and Upper Jurassic Manketouebo Formation. Except for a small amount of rhyolite porphyry veins exposed on the surface, other granitic intrusions, including granite, biotite granite, and syenogranite, are all concealed below 500 m of the ore block surface. The fault structures, including NE-, NW-, and NEE-trending faults, are well-developed. According to the direction of orebodies, the orebodies in the Xinglongshan ore block are mainly divided into (1) NW-trending AgβPbβZn (Cu) ore vein group, (2) NNW-trending AgβPbβZn orebodies, and (3) NNE-trending AgβPbβZn orebodies. In addition, small amounts of near EβW-trending Au-bearing AgβPbβZn orebodies are also developed in this ore block.
(1) The NW-trending AgβPbβZn (Cu) ore vein group: The orebodies in the ore vein group distributed in the central and eastern parts of the ore block are controlled by a NW-trending thick and large fractured zone. The ore-hosting rocks are slate and silty slate of the LowerβMiddle Permian Dashizhai Formation. The overall strike of the ore-vein group is 300Β°β310Β°, inclined towards the southwest, with dip angles of 50Β°β65Β° and a length > 2000 m and a width > 1200 m. The ore-vein group is mainly composed of AgβPbβZn orebodies and AgβZn orebodies, with a small amount of Zn orebodies and AgβCuβPbβZn orebodies. The individual orebodies occur as veins, usually having a length of 100β800 m and a thickness of 1β10 m, with a maximum thickness exceeding 100 m. The ore structure is mainly of fine-vein, stockwork, disseminated, and dense disseminated. The major wall-rock alteration includes silicification and chloritization, with minor sericitization. These altered minerals mainly occur in the form of fine veins and stockworks within a thick NW-trending alteration zone, with minor veins and crumbs of quartz. The grade of the AgβPbβZn orebodies is relatively low, with average grades of 98 g/t Ag, 1.6% Zn, and 0.6% Pb, respectively. The AgβCuβPbβZn orebodies usually occur at the top of the ore-vein group, with a controlled length greater than 300 m and a thickness of 0.6β2.8 m. The AgβCuβPbβZn orebodies have average grades of 263 g/t Ag, 0.7% Cu, 2.2% Zn, and 0.9% Pb, respectively.
(2) The NNW-trending AgβPbβZn orebodies: These orebodies, mainly distributed in the central and eastern parts of the ore block, are controlled by NNW-trending faults. The overall trend of these orebodies is approximately 310Β°, with a thickness of 3β15 m and a length of > 400 m. The ore structure is mainly of massive and vein. The wall-rock alteration is characterized by silicification and carbonation, with minor chloritization, and quartz and calcite mainly occur as fine veins within the orebodies and within a range of no more than two meters nearby. The NW-trending AgβPbβZn orebodies have average grades of 400 g/t Ag (some up to 10,000 g/t), 2.8% Zn, and 4.3% Pb, respectively.
(3) The NNE-trending AgβPbβZn orebodies: These orebodies, distributed in the eastern part of the ore block, are composed of five parallel orebodies. They are controlled by NNE-trending faults, which dip to NWW at > 65Β°. The ore structure is mainly of massive and vein. The types and distribution characteristics of wall-rock alteration are similar to those of the NNW-trending orebodies. These orebodies have a thickness of 2β6 m and a control length > 600 m, with average grades of 400 g/t Ag, 2.5% Zn, and 3.2% Pb, respectively.
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Standard Detailed Gallery Strunz Chemical ElementsCommodity List
This is a list of exploitable or exploited mineral commodities recorded at this locality.Mineral List
16 valid minerals.
Rock Types Recorded
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Alphabetical List Tree DiagramDetailed Mineral List:
Gallery:
List of minerals arranged by Strunz 10th Edition classification
Group 1 - Elements | |||
---|---|---|---|
β | Silver var. KΓΌstelite | 1.AA.05 | Ag |
β | 1.AA.05 | Ag | |
Group 2 - Sulphides and Sulfosalts | |||
β | Acanthite | 2.BA.35 | Ag2S |
β | Aguilarite | 2.BA.55 | Ag4SeS |
β | Canfieldite | 2.BA.70 | Ag8SnS6 |
β | Sphalerite | 2.CB.05a | ZnS |
β | Chalcopyrite | 2.CB.10a | CuFeS2 |
β | Pyrrhotite | 2.CC.10 | Fe1-xS |
β | Galena | 2.CD.10 | PbS |
β | Pyrite | 2.EB.05a | FeS2 |
β | Arsenopyrite | 2.EB.20 | FeAsS |
β | Pyrargyrite | 2.GA.05 | Ag3SbS3 |
β | 'Freibergite Subgroup' | 2.GB.05 | (Ag6,[Ag6]4+)(Cu4 C2+2)Sb4S12S0-1 |
β | Polybasite | 2.GB.15 | [Ag6Sb2S7][Ag9CuS4] |
Group 4 - Oxides and Hydroxides | |||
β | Quartz | 4.DA.05 | SiO2 |
β | Cassiterite | 4.DB.05 | SnO2 |
Group 5 - Nitrates and Carbonates | |||
β | Calcite | 5.AB.05 | CaCO3 |
Group 9 - Silicates | |||
β | Muscovite | 9.EC.15 | KAl2(AlSi3O10)(OH)2 |
β | var. Sericite | 9.EC.15 | KAl2(AlSi3O10)(OH)2 |
Unclassified | |||
β | 'Chlorite Group' | - |
List of minerals for each chemical element
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References
[1]Shi, Jiangpeng, Wu, Guang, Chen, Gongzheng, Yang, Fei, Zhang, Tong, Jiang, Biao, Liu, Wenyuan (2024) Genesis of the Supergiant Shuangjianzishan Ag–Pb–Zn Deposit in the Southern Great Xing’an Range, NE China: Constraints from Geochronology, Isotope Geochemistry, and Fluid Inclusion. Minerals, 14 (1) doi:10.3390/min14010060