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![Photographs representative of outcrops in the Badu deposit. (a) Intrusive contact between dolerite and folded sedimentary strata. (b) Mineralized dolerite with enclave of folded sedimentary rock. (c, d) Mineralized dolerite cut by fault filled with black carbonaceous matter and white calcite. (e) Enlarged picture of red box from (c), showing pyrite lens within carbonaceous matter. (f) Milky quartz veins enveloping centimeter-sized breccia fragments of altered dolerite. Abbreviations: C = carbonaceous matter, Qz = quartz.]()
![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.]()
![(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.]()
![Dating results of magmatic zircon, hydrothermal rutile, and monazite in the Badu deposit. (a, b) Concordia diagram and weighted mean 206Pb/238U age for magmatic zircon from the least altered dolerite (data point uncertainties are 2σ). (c-e) Tera-Wasserburg U-Pb plot for areas with different W, Fe, Nb, and U contents and common Pb compositions in hydrothermal rutile from the mineralized dolerite. (f) Tera-Wasserburg U-Pb plot integrating all data of c, d, and e. (g, h) Tera-Wasserburg U-Pb plot and weighted mean corrected 208Pb/232Th age for hydrothermal monazite from the Badu deposit. The inset images in a and b are representative cathodoluminescence images and 206Pb/238U ages of zircon. The inset images in c-e are representative high-contrast backscattered electron images and W contents of three types of compositional zoning in hydrothermal rutile.]()
![Alteration plots (a-c), variation plots of selected minor elements (d-f), and isochron diagram (g) in dolerite samples with variable gold grades from the Badu deposit. See text for further description.]()
![Photomicrographs and photographs showing mineralogy and textures of ore-associated minerals of the Carlin-type Au deposits in the Youjiang Basin of South China. (A) Au-bearing pyrite (Py) from Shuiyindong. (B) Disseminated Au-bearing arsenopyrite (Apy) from Jinya. Illustration shows the homogeneous texture of Au-bearing arsenopyrite. (C) Disseminated pyrite and arsenopyrite in the dolerite-hosted Badu deposit. Illustration shows pyrite intergrown with arsenopyrite. (D–F) Paragenetically late stibnite (Stb), realgar (Rlg), and cinnabar (Cin), respectively.]()
![Photomicrographs in transmitted light and backscattered electron images showing characteristics of hydrothermal monazite in the Badu deposit. (a-c) Monazite associated with arsenian pyrite. (d-g) Monazite distributed in the matrix of ankerite and sericite. (h) Monazite enclosing sericite and quartz. (i) Monazite with primary two-phase fluid inclusions. Abbreviations: Ank = ankerite, Ap = apatite, Apy = arsenopyrite, As-Py = arsenian pyrite, fl inc = fluid inclusion, Mnz = monazite, Qz = quartz, Ser = sericite.]()
![Photomicrographs in reflected light and backscattered electron images (f, i) showing characteristics of hydrothermal rutile in the Badu deposit. (a) Characteristic reticulated rutile oriented in three directions with angle of 60°. (b, c) Reticulated rutile gradually replaced by pyrite core. (d) Reticulated rutile enclosed in pyrite core. (e, f) Coarse rutile intergrown with herringbone ankerite. (g) Ankerite partially replaced by pyrite and arsenopyrite. (h) Characteristic mosaic rutile. (i) Rutile with complex compositional zoning and a tiny zircon inclusion. Abbreviations: Ank = ankerite, Ap = apatite, Apy = arsenopyrite, Py = pyrite, Qz = quartz, Rt = rutile, Ser = sericite, Zrn = zircon.]()
![(a) Simplified geologic map of the South China block showing the structural framework and locations of the Youjiang basin, Nanling Range, Southeast Coast, and Middle-Lower Yangtze River W-Sn metallogenic belt (modified from Hu et al., 2017). (b) Summary of Early Cretaceous mineralization ages of ore deposits in the Nanling Range, Southeast Coast, and Middle-Lower Yangtze River W-Sn metallogenic belt, which were reliably and precisely constrained by cassiterite U-Pb, molybdenite Re-Os, and muscovite Ar-Ar dating. The mineralization age data are from numerous literature sources (Mao et al., 2004; Zhang et al., 2006; Zeng et al., 2009; Mao et al., 2011; Mao, Z.H., et al., 2013; Pan et al., 2017; Qiu, Z.W., et al., 2017; Liu et al., 2017, 2018; Li et al., 2018; Yan, Q.H., et al., 2018; Xiong et al., 2020). (c) Mineralization ages for the Badu deposit (this study).]()
![Photographs (a, d, g, k), BSE images (b, c, e, f, h-j), and plane-polarized light photograph (l) of variably altered and mineralized samples from the No. II orebody of the Badu deposit hosted in mudstone of the Lower Devonian Yujiang Formation. (a-c) Unaltered mudstone with 0.008 ppm Au containing coarse grains of ankerite with abundant mineral inclusions in a fine-grained matrix of quartz and illite with framboidal pyrite. (d-f) Altered mudstone with 0.75 ppm Au containing ankerite that is partially replaced and rimmed by dark ankerite and quartz. (g-i) Mineralized mudstone with 4.40 ppm Au containing disseminated pyrite and relict ankerite that is strongly replaced by quartz, illite, and dolomite. (j) Ore-stage pyrite with core-rim texture and sphalerite, chalcopyrite, and tetrahedrite along the fractures. (k) Late ore-stage stibnite in a milky quartz vein and realgar intergrown with drusy quartz crystals. (l) Quartz grain intergrown with realgar with abundant fluid and some realgar and cinnabar inclusions. Abbreviations: Ank = ankerite, Apy = arsenopyrite, Cin = cinnabar, Dol = dolomite, fl inc = fluid inclusion, Ill = illite, Py = pyrite, Qz = quartz, Rlg = realgar, Sph = sphalerite, Stbn = stibnite, Thr = tetrahedrite.]()
![Photomicrographs showing alteration features and mineral paragenesis of dolerite-hosted orebodies in the Badu deposit. (a) Least altered dolerite showing typical doleritic or poikilophitic texture with laths of plagioclase intergrown with clinopyroxene. (b, c) Two types of ilmenite in least altered dolerite. (d, e) Mineralized dolerite with ore-stage pyrite, arsenopyrite, rutile, ankerite, and sericite. (f) Ore-stage ankerite and sericite pseudomorphs of the poikilophitic texture of clinopyroxene and plagioclase. (g) Late ore-stage pressure shadow of quartz and ankerite around pyrite. (h) Ore-stage gold-bearing arsenian pyrite with mineral inclusion-rich core and clean rim. (i) Intergrowths of arsenian pyrite and apatite in ore-stage quartz-ankerite veinlet. (j) Sphalerite and chalcopyrite filling fracture in ore-stage pyrite. (k) Sphalerite, tetrahedrite, and chalcopyrite filling the fracture of ore-stage quartz-ankerite veinlet. (l) Multiple stages of quartz-ankerite veinlets with mutually crosscutting relationships. (a, d, g, l) Crossed-polarized light. (i) Plane-polarized light. (b, c, e, h, j, k) Reflected light. (f) BSE image. Abbreviations: Ank = ankerite, Ap = apatite, Apy = arsenopyrite, C = carbonaceous matter, Ccp = chalcopyrite, Cpx = clinopyroxene, Ilm = ilmenite, Pl = plagioclase, Py = pyrite, Qz = quartz, Rt = rutile, Ser = sericite, Sph = sphalerite, Thr = tetrahedrite, Ttn = titanite.]()
![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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![Simplified geologic map showing the distribution of sediment-hosted disseminated Au deposits in the Youjiang basin: 1 = Huijiabao trend, 2 = Getang trend, 3 = Lannigou trend, 4 = Nibao, 5 = Nage 6 = Lekang, 7 = Langquan, 8 = Baidi, 9 = Longhuo, 10 = Gaolong, 11 = Badu, 12 = Jinya, 13 = Linbu (modified from Su et al., 2009a; Chen et al., 2011, 2015).]()
![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.]()
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1-20 OF 82 RESULTS FOR
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Journal Article
U-Pb Dating on Hydrothermal Rutile and Monazite from the Badu Gold Deposit Supports an Early Cretaceous Age for Carlin-Type Gold Mineralization in the Youjiang Basin, Southwestern China Available to Purchase
Journal: Economic Geology
Publisher: Society of Economic Geologists
Published: 01 September 2021
Economic Geology (2021) 116 (6): 1355–1385.
.... The lack of precise age determinations on gold deposits in this province has hindered understanding of their genesis and relation to the geodynamic setting. Although most Carlin-type gold deposits in the basin are hosted in calcareous sedimentary rocks, ~70% of the ore in the Badu Carlin-type gold deposit...
FIGURES
Includes: Supplemental Content
Image
Photographs representative of outcrops in the Badu deposit. (a) Intrusive c... Available to Purchase
in U-Pb Dating on Hydrothermal Rutile and Monazite from the Badu Gold Deposit Supports an Early Cretaceous Age for Carlin-Type Gold Mineralization in the Youjiang Basin, Southwestern China
> Economic Geology
Published: 01 September 2021
Fig. 3. Photographs representative of outcrops in the Badu deposit. (a) Intrusive contact between dolerite and folded sedimentary strata. (b) Mineralized dolerite with enclave of folded sedimentary rock. (c, d) Mineralized dolerite cut by fault filled with black carbonaceous matter and white
Image
Photographs of hand specimens from the Badu deposit (a-j) and Jinfeng, Linw... Available to Purchase
in U-Pb Dating on Hydrothermal Rutile and Monazite from the Badu Gold Deposit Supports an Early Cretaceous Age for Carlin-Type Gold Mineralization in the Youjiang Basin, Southwestern China
> Economic Geology
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
Image
(a) Schematic geologic map of the Badu gold deposit with locations of orebo... Available to Purchase
in U-Pb Dating on Hydrothermal Rutile and Monazite from the Badu Gold Deposit Supports an Early Cretaceous Age for Carlin-Type Gold Mineralization in the Youjiang Basin, Southwestern China
> Economic Geology
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
Image
Dating results of magmatic zircon, hydrothermal rutile, and monazite in the... Available to Purchase
in U-Pb Dating on Hydrothermal Rutile and Monazite from the Badu Gold Deposit Supports an Early Cretaceous Age for Carlin-Type Gold Mineralization in the Youjiang Basin, Southwestern China
> Economic Geology
Published: 01 September 2021
Fig. 12. Dating results of magmatic zircon, hydrothermal rutile, and monazite in the Badu deposit. (a, b) Concordia diagram and weighted mean 206 Pb/ 238 U age for magmatic zircon from the least altered dolerite (data point uncertainties are 2 σ ). (c-e) Tera-Wasserburg U-Pb plot for areas
Image
Alteration plots (a-c), variation plots of selected minor elements (d-f), a... Available to Purchase
in U-Pb Dating on Hydrothermal Rutile and Monazite from the Badu Gold Deposit Supports an Early Cretaceous Age for Carlin-Type Gold Mineralization in the Youjiang Basin, Southwestern China
> Economic Geology
Published: 01 September 2021
Fig. 10. Alteration plots (a-c), variation plots of selected minor elements (d-f), and isochron diagram (g) in dolerite samples with variable gold grades from the Badu deposit. See text for further description.
Image
Photomicrographs and photographs showing mineralogy and textures of ore-ass... Available to Purchase
in Large-scale basement mobilization endows the giant Carlin-type gold mineralization in the Youjiang Basin, South China: Insights from mercury isotopes
> GSA Bulletin
Published: 16 March 2023
the homogeneous texture of Au-bearing arsenopyrite. (C) Disseminated pyrite and arsenopyrite in the dolerite-hosted Badu deposit. Illustration shows pyrite intergrown with arsenopyrite. (D–F) Paragenetically late stibnite (Stb), realgar (Rlg), and cinnabar (Cin), respectively.
Image
Photomicrographs in transmitted light and backscattered electron images sho... Available to Purchase
in U-Pb Dating on Hydrothermal Rutile and Monazite from the Badu Gold Deposit Supports an Early Cretaceous Age for Carlin-Type Gold Mineralization in the Youjiang Basin, Southwestern China
> Economic Geology
Published: 01 September 2021
Fig. 14. Photomicrographs in transmitted light and backscattered electron images showing characteristics of hydrothermal monazite in the Badu deposit. (a-c) Monazite associated with arsenian pyrite. (d-g) Monazite distributed in the matrix of ankerite and sericite. (h) Monazite enclosing sericite
Image
Photomicrographs in reflected light and backscattered electron images (f, i... Available to Purchase
in U-Pb Dating on Hydrothermal Rutile and Monazite from the Badu Gold Deposit Supports an Early Cretaceous Age for Carlin-Type Gold Mineralization in the Youjiang Basin, Southwestern China
> Economic Geology
Published: 01 September 2021
Fig. 13. Photomicrographs in reflected light and backscattered electron images (f, i) showing characteristics of hydrothermal rutile in the Badu deposit. (a) Characteristic reticulated rutile oriented in three directions with angle of 60°. (b, c) Reticulated rutile gradually replaced by pyrite
Image
(a) Simplified geologic map of the South China block showing the structural... Available to Purchase
in U-Pb Dating on Hydrothermal Rutile and Monazite from the Badu Gold Deposit Supports an Early Cretaceous Age for Carlin-Type Gold Mineralization in the Youjiang Basin, Southwestern China
> Economic Geology
Published: 01 September 2021
( Mao et al., 2004 ; Zhang et al., 2006 ; Zeng et al., 2009 ; Mao et al., 2011 ; Mao, Z.H., et al., 2013 ; Pan et al., 2017 ; Qiu, Z.W., et al., 2017 ; Liu et al., 2017 , 2018 ; Li et al., 2018 ; Yan, Q.H., et al., 2018 ; Xiong et al., 2020 ). (c) Mineralization ages for the Badu deposit
Image
Photographs (a, d, g, k), BSE images (b, c, e, f, h-j), and plane-polarized... Available to Purchase
in U-Pb Dating on Hydrothermal Rutile and Monazite from the Badu Gold Deposit Supports an Early Cretaceous Age for Carlin-Type Gold Mineralization in the Youjiang Basin, Southwestern China
> Economic Geology
Published: 01 September 2021
Fig. 8. Photographs (a, d, g, k), BSE images (b, c, e, f, h-j), and plane-polarized light photograph (l) of variably altered and mineralized samples from the No. II orebody of the Badu deposit hosted in mudstone of the Lower Devonian Yujiang Formation. (a-c) Unaltered mudstone with 0.008 ppm Au
Image
Photomicrographs showing alteration features and mineral paragenesis of dol... Available to Purchase
in U-Pb Dating on Hydrothermal Rutile and Monazite from the Badu Gold Deposit Supports an Early Cretaceous Age for Carlin-Type Gold Mineralization in the Youjiang Basin, Southwestern China
> Economic Geology
Published: 01 September 2021
Fig. 7. Photomicrographs showing alteration features and mineral paragenesis of dolerite-hosted orebodies in the Badu deposit. (a) Least altered dolerite showing typical doleritic or poikilophitic texture with laths of plagioclase intergrown with clinopyroxene. (b, c) Two types of ilmenite
Image
Mineral paragenesis for dolerite rock-hosted (Badu) and sedimentary rock-ho... Available to Purchase
in U-Pb Dating on Hydrothermal Rutile and Monazite from the Badu Gold Deposit Supports an Early Cretaceous Age for Carlin-Type Gold Mineralization in the Youjiang Basin, Southwestern China
> Economic Geology
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.
Journal Article
Le epiclastiti zeolitizzate del Logudoro orientale; un livello guida all'interno della successione vulcano-sedimentaria della Sardegna centrosettentrionale Free
Journal: Italian Journal of Geosciences
Publisher: Societa Geologica Italiana
Published: 01 January 2002
Italian Journal of Geosciences (2002) 121 (1): 3–10.
... of Badu e Giaga Epiclastics. This deposit of lacustrine environment has been recognised for the first time as an important stratigraphic marker within a mainly volcanic area where the lithologic units show limited lateral continuity as well as highly variable thickness. For these reasons a sedimentary...
Journal Article
Geochronology of early Mesozoic diabase units in southwestern China: metallogenic and tectonic implications Available to Purchase
Journal: Geological Magazine
Publisher: Cambridge University Press
Published: 11 July 2018
Geological Magazine (2019) 156 (7): 1141–1156.
...). However, rare magmatic rocks have been identified in the Youjiang fold-and-thrust belt (Wang, Y. J. et al. 2013 ; Qiu, L. et al. 2015 a,b , 2016 ). In addition, the recent discovery of an Au deposit hosted by the Badu diabase (Dong et al. 2013 ; Li, P. et al . 2015 ) implies a genetic...
FIGURES
Image
Simplified geologic map showing the distribution of sediment-hosted dissemi... Available to Purchase
in Textures and In Situ Chemical and Isotopic Analyses of Pyrite, Huijiabao Trend, Youjiang Basin, China: Implications for Paragenesis and Source of Sulfur
> Economic Geology
Published: 01 March 2016
Fig. 1 Simplified geologic map showing the distribution of sediment-hosted disseminated Au deposits in the Youjiang basin: 1 = Huijiabao trend, 2 = Getang trend, 3 = Lannigou trend, 4 = Nibao, 5 = Nage 6 = Lekang, 7 = Langquan, 8 = Baidi, 9 = Longhuo, 10 = Gaolong, 11 = Badu, 12 = Jinya, 13
Image
Summary of zircon U-Th/He ages (a), correlations of eU with 4 He abundance... Available to Purchase
in U-Pb Dating on Hydrothermal Rutile and Monazite from the Badu Gold Deposit Supports an Early Cretaceous Age for Carlin-Type Gold Mineralization in the Youjiang Basin, Southwestern China
> Economic Geology
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
Large-scale basement mobilization endows the giant Carlin-type gold mineralization in the Youjiang Basin, South China: Insights from mercury isotopes Available to Purchase
Journal: GSA Bulletin
Publisher: Geological Society of America
Published: 16 March 2023
GSA Bulletin (2023) 135 (11-12): 3163–3172.
... the homogeneous texture of Au-bearing arsenopyrite. (C) Disseminated pyrite and arsenopyrite in the dolerite-hosted Badu deposit. Illustration shows pyrite intergrown with arsenopyrite. (D–F) Paragenetically late stibnite (Stb), realgar (Rlg), and cinnabar (Cin), respectively. ...
FIGURES
Journal Article
A sedimentary archive of tectonic switching from Emeishan Plume to Indosinian orogenic sources in SW China Available to Purchase
Journal: Journal of the Geological Society
Publisher: Geological Society of London
Published: 25 November 2013
Journal of the Geological Society (2014) 171 (2): 269–280.
... sections, the Lower Triassic succession consists of mudstone intercalated with tuff layers in the lower part and shale, marl, limestone and calcirudite in the upper part. At Yutang, the Lower Triassic succession is composed of mudstone, siltstone, limestone and basaltic andesite, and at Badu, it consists...
FIGURES
Journal Article
Constraints on the growth and evolution of continental crust in the NE Cathaysia Block: insights from detrital zircon U–Pb ages and Hf–O isotopic analyses in Tingjiang sediments Available to Purchase
Journal: Journal of the Geological Society
Publisher: Geological Society of London
Published: 02 October 2024
Journal of the Geological Society (2024) 181 (6): jgs2024-103.
... of the underlying rocks and deposit them on the subsided continental margin. The Shanghang Basin is an ideal place for revealing the ages of different components in this zone. River sand samples were collected from a total of five samples in the upper, middle and lower reaches of the Tingjiang River...
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