Pangjiahe Au deposit, Feng County, Baoji, Shaanxi, Chinai
| Regional Level Types | |
|---|---|
| Pangjiahe Au deposit | Deposit |
| Feng County | County |
| Baoji | Prefecture-level City |
| Shaanxi | Province |
| China | Country |
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Latitude & Longitude (WGS84):
34° 2' 9'' North , 106° 32' 33'' East
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Name(s) in local language(s):
庞家河金矿, 凤县, 宝鸡市, 陕西省, 中国
∼38 t reserves Au at Pangjiahe
It is hosted primarily within the Upper Devonian D3d Formation (phyllite and sandstone). The main structure is the E-W striking Pangjiahe anticline. Gold mineralization is controlled by three main E-W striking, steeply S-dipping strike-slip faults developed on the southern limb of this anticline. The main ore bodies (170–360 m long, 0.1–12.5 m thick; total reserve ∼ 37 t Au @ 6.3 g/t Au) are hosted within these fault zones, adjacent foliated phyllite, quartz veins, and locally within granite porphyry. Alteration is dominated by silicification, sericitization, and sulfidation (pyrite-quartz-sericite assemblages). Two intrusive phases are also recognized. Granite porphyry dykes concentrated in the western part of the deposit, best observed at depth, dated at ca. 240 Ma (Zircon U-Pb). They show sharp contacts with the sedimentary rocks, and are locally mineralized (up to 4 g/t Au). Diabase dykes are predominant in the eastern part, dated at ca. 220 Ma (Zircon U-Pb), and often crosscut ore bodies. As at Matigou, hydrothermal mineral dating (Hydrothermal zircon U-Pb, sericite 40Ar/39Ar) points to a main gold mineralization age of ca. 230 Ma.
Six orebodies have been delineated, with five exposed at the surface and one at depth. The principal orebodies contain approximately 38 t Au at an average grade of 6.3 g/t. Mineralisation is hosted primarily by E-W-trending ductile–brittle shear zones, associated foliated phyllite and locally granite porphyry. Gold mineralisation is principally controlled by a series of subparallel E-W-trending ductile–brittle shear zones developed along the southern limb of the Pangjiahe anticline. The shear zones are typically 3–10 m wide, locally exceeding 10 m, and exhibit remarkable continuity both along strike and down dip. Deep exploration below the 1020 m level has identified two additional E-W-trending ore-bearing structures, indicating that the mineralised shear system extends to depth and displays an overall en echelon geometry.
It is hosted primarily within the Upper Devonian D3d Formation (phyllite and sandstone). The main structure is the E-W striking Pangjiahe anticline. Gold mineralization is controlled by three main E-W striking, steeply S-dipping strike-slip faults developed on the southern limb of this anticline. The main ore bodies (170–360 m long, 0.1–12.5 m thick; total reserve ∼ 37 t Au @ 6.3 g/t Au) are hosted within these fault zones, adjacent foliated phyllite, quartz veins, and locally within granite porphyry. Alteration is dominated by silicification, sericitization, and sulfidation (pyrite-quartz-sericite assemblages). Two intrusive phases are also recognized. Granite porphyry dykes concentrated in the western part of the deposit, best observed at depth, dated at ca. 240 Ma (Zircon U-Pb). They show sharp contacts with the sedimentary rocks, and are locally mineralized (up to 4 g/t Au). Diabase dykes are predominant in the eastern part, dated at ca. 220 Ma (Zircon U-Pb), and often crosscut ore bodies. As at Matigou, hydrothermal mineral dating (Hydrothermal zircon U-Pb, sericite 40Ar/39Ar) points to a main gold mineralization age of ca. 230 Ma.
Six orebodies have been delineated, with five exposed at the surface and one at depth. The principal orebodies contain approximately 38 t Au at an average grade of 6.3 g/t. Mineralisation is hosted primarily by E-W-trending ductile–brittle shear zones, associated foliated phyllite and locally granite porphyry. Gold mineralisation is principally controlled by a series of subparallel E-W-trending ductile–brittle shear zones developed along the southern limb of the Pangjiahe anticline. The shear zones are typically 3–10 m wide, locally exceeding 10 m, and exhibit remarkable continuity both along strike and down dip. Deep exploration below the 1020 m level has identified two additional E-W-trending ore-bearing structures, indicating that the mineralised shear system extends to depth and displays an overall en echelon geometry.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsCommodity List
This is a list of exploitable or exploited mineral commodities recorded at this locality.Mineral List
10 valid minerals.
Rock Types Recorded
Select Rock List Type
Alphabetical List Tree DiagramDetailed Mineral List:
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 1 - Elements | |||
|---|---|---|---|
| ⓘ | Native Gold var. Electrum | 1.AA.05 | (Au,Ag) |
| ⓘ | 1.AA.05 | Au | |
| Group 2 - Sulphides and Sulfosalts | |||
| ⓘ | Sphalerite | 2.CB.05a | ZnS |
| ⓘ | Galena | 2.CD.10 | PbS |
| ⓘ | Pyrite | 2.EB.05a | FeS2 |
| ⓘ | Arsenopyrite | 2.EB.20 | FeAsS |
| Group 4 - Oxides and Hydroxides | |||
| ⓘ | Quartz | 4.DA.05 | SiO2 |
| Group 5 - Nitrates and Carbonates | |||
| ⓘ | Calcite | 5.AB.05 | CaCO3 |
| ⓘ | Dolomite | 5.AB.10 | CaMg(CO3)2 |
| Group 9 - Silicates | |||
| ⓘ | Zircon | 9.AD.30 | Zr(SiO4) |
| ⓘ | Muscovite var. Illite | 9.EC.15 | K0.65Al2.0[Al0.65Si3.35O10](OH)2 |
| ⓘ | 9.EC.15 | KAl2(AlSi3O10)(OH)2 | |
| ⓘ | var. Sericite | 9.EC.15 | KAl2(AlSi3O10)(OH)2 |
| Unclassified | |||
| ⓘ | 'Chlorite Group' | - | |
| ⓘ | 'Tourmaline' | - | AD3G6(T6O18)(BO3)3X3Z |
| ⓘ | 'Apatite' | - | Ca5(PO4)3A |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | ⓘ Muscovite var. Illite | K0.65Al2.0[Al0.65Si3.35O10](OH)2 |
| H | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
| H | ⓘ Muscovite var. Sericite | KAl2(AlSi3O10)(OH)2 |
| B | Boron | |
| B | ⓘ Tourmaline | AD3G6(T6O18)(BO3)3X3Z |
| C | Carbon | |
| C | ⓘ Calcite | CaCO3 |
| C | ⓘ Dolomite | CaMg(CO3)2 |
| O | Oxygen | |
| O | ⓘ Calcite | CaCO3 |
| O | ⓘ Dolomite | CaMg(CO3)2 |
| O | ⓘ Muscovite var. Illite | K0.65Al2.0[Al0.65Si3.35O10](OH)2 |
| O | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
| O | ⓘ Quartz | SiO2 |
| O | ⓘ Tourmaline | AD3G6(T6O18)(BO3)3X3Z |
| O | ⓘ Zircon | Zr(SiO4) |
| O | ⓘ Muscovite var. Sericite | KAl2(AlSi3O10)(OH)2 |
| O | ⓘ Apatite | Ca5(PO4)3A |
| Mg | Magnesium | |
| Mg | ⓘ Dolomite | CaMg(CO3)2 |
| Al | Aluminium | |
| Al | ⓘ Muscovite var. Illite | K0.65Al2.0[Al0.65Si3.35O10](OH)2 |
| Al | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
| Al | ⓘ Muscovite var. Sericite | KAl2(AlSi3O10)(OH)2 |
| Si | Silicon | |
| Si | ⓘ Muscovite var. Illite | K0.65Al2.0[Al0.65Si3.35O10](OH)2 |
| Si | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
| Si | ⓘ Quartz | SiO2 |
| Si | ⓘ Zircon | Zr(SiO4) |
| Si | ⓘ Muscovite var. Sericite | KAl2(AlSi3O10)(OH)2 |
| P | Phosphorus | |
| P | ⓘ Apatite | Ca5(PO4)3A |
| S | Sulfur | |
| S | ⓘ Arsenopyrite | FeAsS |
| S | ⓘ Galena | PbS |
| S | ⓘ Pyrite | FeS2 |
| S | ⓘ Sphalerite | ZnS |
| K | Potassium | |
| K | ⓘ Muscovite var. Illite | K0.65Al2.0[Al0.65Si3.35O10](OH)2 |
| K | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
| K | ⓘ Muscovite var. Sericite | KAl2(AlSi3O10)(OH)2 |
| Ca | Calcium | |
| Ca | ⓘ Calcite | CaCO3 |
| Ca | ⓘ Dolomite | CaMg(CO3)2 |
| Ca | ⓘ Apatite | Ca5(PO4)3A |
| Fe | Iron | |
| Fe | ⓘ Arsenopyrite | FeAsS |
| Fe | ⓘ Pyrite | FeS2 |
| Zn | Zinc | |
| Zn | ⓘ Sphalerite | ZnS |
| As | Arsenic | |
| As | ⓘ Arsenopyrite | FeAsS |
| Zr | Zirconium | |
| Zr | ⓘ Zircon | Zr(SiO4) |
| Ag | Silver | |
| Ag | ⓘ Native Gold var. Electrum | (Au,Ag) |
| Au | Gold | |
| Au | ⓘ Native Gold var. Electrum | (Au,Ag) |
| Au | ⓘ Native Gold | Au |
| Pb | Lead | |
| Pb | ⓘ Galena | PbS |
Other Regions, Features and Areas containing this locality
AsiaContinent
China
- Qinling Li Mineral BeltMineral Belt
- Qinling Metallogenic BeltMineral Belt
Eurasian PlateTectonic Plate
- Kunlun/South Qilian Fold BeltVolcanic Arc
- North China CratonOrogen
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References
Mao, Jingwen, Qiu, Yumin, Goldfarb, Richard, Zhang, Zhaochong, Garwin, Steve, Fengshou, Ren (2002) Geology, distribution, and classification of gold deposits in the western Qinling belt, central China. Mineralium Deposita, 37 (3) 352-377 doi:10.1007/s00126-001-0249-0
[1]Ma, Jian; Lü, Xinbiao; Deng, Ke (2026) Ore-forming processes of orogenic gold deposits in the northwest Fengtai Basin, South Qinling Orogen, central China: Constraints from pyrite texture and geochemistry. Ore Geology Reviews, 195. p.107385. doi:10.1016/j.oregeorev.2026.107385
[2]Teng, Fei; Li, Guoying; Jia, Jianjun; Tang, Yuanhe; Guo, Wendi; Bagas, Leon; Yang, Shuai; Li, Xiao; Bian, Fei; Gao, Yongbao; et al. (2026) Revisiting the Pangjiahe Au Deposit, West Qinling Orogen, Central China: New In Situ Sericite and Apatite Geochronology, Fe-S Isotope Constraints, and Implications for Regional Metallogeny. Geosciences, 16 (8). p.332. doi:10.3390/geosciences16080332
