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Jinfeng Deposit

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Microstructures of Au-bearing arsenian pyrite from the Jinfeng deposit. A. A bright-field (BF) image shows stacking faults that highlight planar defects and associated fluid inclusions in Au-bearing arsenian pyrite. The endpoint of the stacking fault is usually decorated by a fluid inclusion. B. A high-resolution transmission electron microscopy (HRTEM) image shows a stacking fault parallel to the (100) plane of arsenian pyrite. The inserted image is the fast Fourier transform (FFT) image from the white rectangular area. FFT was indexed as arsenian pyrite. C. An HRTEM image shows a stacking fault parallel to the (200) plane of arsenian pyrite and an amorphous nanoparticle in the stacking fault. The FFT image from area 2 (FFT 2) shows streaking of the diffraction spots caused by the very thin plane of the stacking fault. The FFT from area 1 (FFT 1) indicates crystalline pyrite. D. A BF image shows dislocations and stacking faults in Au-bearing pyrite. Some dislocations that bend around a nanoparticle are highlighted by white dashed lines. NP = nanoparticle.
Published: 01 March 2021
Fig. 7. Microstructures of Au-bearing arsenian pyrite from the Jinfeng deposit. A. A bright-field (BF) image shows stacking faults that highlight planar defects and associated fluid inclusions in Au-bearing arsenian pyrite. The endpoint of the stacking fault is usually decorated by a fluid
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Geologic cross section of the Jinfeng deposit, showing the transect sample locations (modified from Xie et al., 2018).
Published: 01 November 2018
Fig. 3. Geologic cross section of the Jinfeng deposit, showing the transect sample locations (modified from Xie et al., 2018 ).
Journal Article
Journal: Economic Geology
Published: 01 November 2018
Economic Geology (2018) 113 (7): 1627–1652.
...Fig. 3. Geologic cross section of the Jinfeng deposit, showing the transect sample locations (modified from Xie et al., 2018 ). ...
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Journal Article
Journal: Economic Geology
Published: 01 March 2021
Economic Geology (2021) 116 (2): 515–526.
...Fig. 7. Microstructures of Au-bearing arsenian pyrite from the Jinfeng deposit. A. A bright-field (BF) image shows stacking faults that highlight planar defects and associated fluid inclusions in Au-bearing arsenian pyrite. The endpoint of the stacking fault is usually decorated by a fluid...
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Series: Reviews in Economic Geology
Published: 01 January 2018
DOI: 10.5382/rev.20.06
EISBN: 9781629491189
... Exploration and Development, for access to the Shuiyindong deposit, Eldorado Gold Corporation for access to the Jinfeng deposit, and Barrick Gold Corporation for access to the Getchell and Cortez Hills deposits. In particular, Lindsey Clark Maroun is thanked for providing samples from the Cortez Hills deposit...
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Photographs of hand specimens from the Badu deposit (a-j) and Jinfeng, Linwang, Jinya, and Nakuang deposits (k-o). (a) Least altered dolerite with porphyritic texture. (b-e) Disseminated pyrite and arsenopyrite in mineralized dolerites with variable gold grade. (f) Silicified dolerite with abundant carbonaceous matter. (g) Mineralized dolerite crosscut by quartz veins and solid carbonaceous material veinlets. (h, i) Mineralized dolerite crosscut by quartz-ankerite veins with clots of hydrothermal sericite. (j) Altered dolerite cut by pyrite-quartz veinlet and quartz-ankerite vein containing pyrite. (k) Barren dolomitic calcareous siltstone and (l) ore-grade silicified calcareous siltstone with disseminated pyrite from the Jinfeng deposit. (m) Ore-grade silicified calcareous siltstone with disseminated arsenopyrite and pyrite from the Nakuang deposit. (n) Brecciated ore-grade silicified calcareous siltstone with abundant disseminated arsenopyrite cemented by quartz-ankerite from the Jinya deposit. (o) High-grade silicified calcareous siltstone crosscut by quartz-calcite veinlets from the Linwang deposit. Abbreviations: Ank = ankerite, Apy = arsenopyrite, BD = Badu, C = carbonaceous matter, Cal = calcite, JF = Jinfeng, JY = Jinya, LW = Linwang, NK = Nakuang, Py = pyrite, Qz = quartz, Ser = sericite.
Published: 01 September 2021
Fig. 5. Photographs of hand specimens from the Badu deposit (a-j) and Jinfeng, Linwang, Jinya, and Nakuang deposits (k-o). (a) Least altered dolerite with porphyritic texture. (b-e) Disseminated pyrite and arsenopyrite in mineralized dolerites with variable gold grade. (f) Silicified dolerite
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Backscattered electron (BSE) images showing Au-bearing arsenian pyrite rimming pre-ore pyrite at Jinfeng, China (A) and Getchell, USA (B). A. Gold-bearing arsenian pyrite from the Jinfeng deposit exhibits narrow, bright oscillatory As-rich sub-bands. B. Getchell Au-bearing arsenian pyrite has irregular fuzzy rims. Py = pyrite.
Published: 01 March 2021
Fig. 1. Backscattered electron (BSE) images showing Au-bearing arsenian pyrite rimming pre-ore pyrite at Jinfeng, China (A) and Getchell, USA (B). A. Gold-bearing arsenian pyrite from the Jinfeng deposit exhibits narrow, bright oscillatory As-rich sub-bands. B. Getchell Au-bearing arsenian pyrite
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The plot of Au-As EPMA analyses of ore-stage arsenian pyrite from Guizhou Shuiyindong and Jinfeng deposits, and Nevada Getchell and Cortez Hills deposits (log-scale, in mol %, the data sources are listed in Table A2). All analyses plot below the solubility limit, after Reich et al. (2005).
Published: 01 March 2021
Fig. 2. The plot of Au-As EPMA analyses of ore-stage arsenian pyrite from Guizhou Shuiyindong and Jinfeng deposits, and Nevada Getchell and Cortez Hills deposits (log-scale, in mol %, the data sources are listed in Table A2). All analyses plot below the solubility limit, after Reich et al. ( 2005 ).
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High-angle annular dark-field (HAADF) images (A, C) and energy-dispersive X-ray spectroscopy (EDX) spectrum (B, D) of the Au-rich domain and Au-free (below detection limit) area in Au-bearing pyrite. A. A gold-rich domain in Au-bearing arsenian pyrite from the Getchell deposit has no visible nanoparticles, but (B) exhibits Au, As, Hg, Tl, Cu, and Sb peaks in the EDX spectrum. White spots on image A are a result of carbon contamination by the electron beam during EDX analysis. C. An Au-free area and Au-rich domain in Au-bearing arsenian pyrite from the Jinfeng deposit show no visible nanoparticles. The brighter band on the right side of “C” is probably a result of Ga implantation during TEM foil preparation. D. An EDX spectrum of the Au-free area shows the Au concentration in the arsenian pyrite is below the EDX detection limit. The Mo peak in the EDX spectrum (D) is from the Mo grid on which the sample rests.
Published: 01 March 2021
no visible nanoparticles, but (B) exhibits Au, As, Hg, Tl, Cu, and Sb peaks in the EDX spectrum. White spots on image A are a result of carbon contamination by the electron beam during EDX analysis. C. An Au-free area and Au-rich domain in Au-bearing arsenian pyrite from the Jinfeng deposit show no visible
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Textural and BSE (A), chemistry (B-G), and δ34S isotope composition (H) of pre-ore pyrite 2 and ore pyrite from the Jinfeng deposit (sample HDDS0091-507, 28 g/t Au). A. Anhedral pre-ore pyrite 2 is rimmed by ore pyrite. The inner rim of ore pyrite has As-rich subbands. Green dots are locations of EPMA spots. Labels show analysis number and Au concentration in ppm. All EPMA data were listed in the appendix of Xie et al. (2018). B. Spider diagrams of EPMA data show that ore pyrite contains more As, Au, and Tl than pre-ore pyrite 2. C-G. LA-ICP-MS maps of Au (C), As (D), Cu (E), Sb (F), and Pb (G) showing the correlation of these elements in pre-ore pyrite 2 and ore pyrite. The inner rim is more enriched in As and Cu than the outer rim. H. Three pre-ore pyrite 2 cores with ore pyrite rims (BSE images) and a spider diagram of δ34S isotope compositions, analyzed by LA-MC-ICP-MS, of pre-ore pyrite 2 (spots 1–3). These compositions are generally lower than those of ore pyrite (spots 4–9). Red dots are locations of δ34S analyses and isotopic compositions are in ‰. Abbreviations: bdl = below detection limit (~120 ppm for EPMA), Opy = ore pyrite, PrePy2 = pre-ore pyrite 2.
Published: 01 November 2018
Fig. 7. Textural and BSE (A), chemistry (B-G), and δ 34 S isotope composition (H) of pre-ore pyrite 2 and ore pyrite from the Jinfeng deposit (sample HDDS0091-507, 28 g/t Au). A. Anhedral pre-ore pyrite 2 is rimmed by ore pyrite. The inner rim of ore pyrite has As-rich subbands. Green dots
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(a) Schematic geologic map of the Badu gold deposit with locations of orebody VI and II cross section lines a-a′ and b-b′. (b) Geologic cross sections of the dolerite-hosted No. VI orebody (a-a′) and the sedimentary rock-hosted No. II orebody (b-b′) in the Badu deposit (modified from Jinfeng Corp, unpub. report, 2018). Gold grades of samples in drill hole Zk6001 and Zk2454 are from the internal 2018 exploration report of the Jinfeng Mining Company.
Published: 01 September 2021
Fig. 2. (a) Schematic geologic map of the Badu gold deposit with locations of orebody VI and II cross section lines a-a′ and b-b′. (b) Geologic cross sections of the dolerite-hosted No. VI orebody (a-a′) and the sedimentary rock-hosted No. II orebody (b-b′) in the Badu deposit (modified from
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Mineral paragenesis for dolerite rock-hosted (Badu) and sedimentary rock-hosted (Jinfeng, Linwang, Jinya, Nakuang, and Badu) gold deposits in the Youjiang basin.
Published: 01 September 2021
Fig. 6. Mineral paragenesis for dolerite rock-hosted (Badu) and sedimentary rock-hosted (Jinfeng, Linwang, Jinya, Nakuang, and Badu) gold deposits in the Youjiang basin.
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Histogram of all δ34S isotope data gathered in this study from pre-ore pyrite 2 (PrePy2) and ore pyrite (Opy) from the Shuiyindong (SYD) and Jinfeng (JF) deposits. See Table 5 for analysis details.
Published: 01 November 2018
Fig. 8. Histogram of all δ 34 S isotope data gathered in this study from pre-ore pyrite 2 (PrePy2) and ore pyrite (Opy) from the Shuiyindong (SYD) and Jinfeng (JF) deposits. See Table 5 for analysis details.
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Summary of zircon U-Th/He ages (a), correlations of eU with 4He abundance (b), grain radius with zircon (U-Th)/He ages (c), and eU with zircon (U-Th)/He ages (d) of samples from the Badu, Jinfeng, Linwang, Jinya, and Nakuang deposits. The black and gray dashed boxes emphasize JF-2@1 and LW-1@1 dates, which have lower zircon U-Th/He ages because of smaller size (Rs) and/or lower eU.
Published: 01 September 2021
Fig. 11. Summary of zircon U-Th/He ages (a), correlations of eU with 4 He abundance (b), grain radius with zircon (U-Th)/He ages (c), and eU with zircon (U-Th)/He ages (d) of samples from the Badu, Jinfeng, Linwang, Jinya, and Nakuang deposits. The black and gray dashed boxes emphasize JF-2@1
Journal Article
Journal: Economic Geology
Published: 01 September 2021
Economic Geology (2021) 116 (6): 1355–1385.
...Fig. 5. Photographs of hand specimens from the Badu deposit (a-j) and Jinfeng, Linwang, Jinya, and Nakuang deposits (k-o). (a) Least altered dolerite with porphyritic texture. (b-e) Disseminated pyrite and arsenopyrite in mineralized dolerites with variable gold grade. (f) Silicified dolerite...
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Journal Article
Journal: GSA Bulletin
Published: 16 March 2023
GSA Bulletin (2023) 135 (11-12): 3163–3172.
.... A total of 101 mineralized samples from seven Carlin-type Au deposits, namely Shuiyindong, Lanmuchang, Jinfeng, Linwang, Jinya, Nakuang, and Badu deposits ( Fig. 1B ) throughout the Youjiang Basin were collected in this study. These deposits are representative of various styles of Au mineralization...
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Journal Article
Journal: Economic Geology
Published: 01 March 2006
Economic Geology (2006) 101 (2): 479–480.
... processes. China-specific exploration and mine and prospect developments, including descriptions of the Jinfeng gold deposit in Gansu Province and an overview of diamond exploration in the North China craton (SEG-sponsored session). This two-volume publication of short papers for the Eighth...
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BSE images (a-j) and photographs (k, l) of variably altered and mineralized samples from the Jinfeng, Linwang, Jinya, and Nakuang Carlin-type gold deposits. (a, d) Barren siltstone with &lt;0.005 ppm Au composed of quartz and ferroan dolomite with minor dolomite, calcite, pyrite, and carbonaceous matter. Ferroan dolomite cores contain numerous mineral inclusions of muscovite and quartz. (b, e) Low-grade siltstone with &lt;1 ppm Au consisting of ferroan dolomite that is partially replaced by quartz; calcite is absent. (c, f) Ore-grade siltstone with &gt;3 ppm Au containing abundant pyrite and relict ferroan dolomite that is intensively replaced by quartz. (g) Mineralized siltstone with abundant arsenopyrite and pyrite is crosscut by quartz veinlets containing little or no sulfides. (h) Euhedral dark pyrite core and bright oscillatory zoned arsenian pyrite rim. (i) Corroded dark pyrite core rimmed by bright arsenian pyrite and arsenopyrite. (j, k) Mineralized siltstone and ore-stage quartz-ankerite veinlets cut by late realgar veinlets. Note coin for scale in k. (l) Open-space-filling realgar intergrown with drusy quartz and stibnite intergrown with calcite and quartz. Abbreviations: Ank = ankerite, Ap = apatite, Apy = arsenopyrite, C = carbonaceous matter, Cal = calcite, Dol = dolomite, Fe-Dol = Fe-bearing dolomite, Ill = illite, Mus = muscovite, Py = pyrite, Qz = quartz, Rlg = realgar, Stbn = stibnite.
Published: 01 September 2021
Fig. 9. BSE images (a-j) and photographs (k, l) of variably altered and mineralized samples from the Jinfeng, Linwang, Jinya, and Nakuang Carlin-type gold deposits. (a, d) Barren siltstone with <0.005 ppm Au composed of quartz and ferroan dolomite with minor dolomite, calcite, pyrite
Journal Article
Published: 02 January 2024
American Mineralogist (2024) 109 (1): 215–224.
... ). (Color online.) The Lannigou (aka. Jinfeng) gold deposit is a giant CTGD in the Youjiang Basin ( Hu et al. 2002 ; Su et al. 2009 , 2018 ; Fig. 1 ). The orebodies occur as veins and lenses in the Middle Triassic Xuman and Bianyang formations calcareous siltstone and mudstone, and are mainly...
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Journal Article
Journal: Economic Geology
Published: 01 March 2020
Economic Geology (2020) 115 (2): 455–469.
... China : Chinese Science Bulletin , v. 36 , p. 1838 – 1839 (in Chinese). Chen , M. , 2007 , The genetic model of Jinfeng (Lannigou) gold deposit based on the coupling of metallotectonics and ore-forming fluid : Ph.D. dissertation, Beijing, China , Chinese Academy of Geological Sciences...
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