Genetic relationship between silver–lead–zinc mineralization in the Wutong deposit, Guangxi Province and Mesozoic granitic magmatism in the Nanling belt, southeast China

Lecumberri-Sánchez, Pilar; Romer, Rolf L.; Lüders, Volker; Bodnar, Robert J.

doi:10.1007/s00126-013-0494-z

Cited by 34 publications

(11 citation statements)

References 42 publications

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“…Bodnar et al (1985a) quantitatively described the effect of trapping multiple fluid phases in the epithermal environment and showed that trapping of only a few volume percent vapor along with the liquid would result in Th that was several tens of degrees higher than the trapping temperature. Similarly, Lecumberri-Sanchez et al (2014) show that many fluid inclusions in the porphyry copper environment that homogenize by halite dissolution are the result of trapping halite along with liquid. Accordingly, we note that in our study of the Bingham Canyon deposit, FIAs composed of inclusions that homogenize by halite dissolution generally show the greatest variability in T h in the deposit.…”

Section: Potential Causes For Th Variation Within Fiasmentioning

confidence: 94%

How Precisely Can the Temperature of a Fluid Event be Constrained Using Fluid Inclusions?

Fall

Bodnar

2018

Economic Geology

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Fluid inclusions in clearly defined fluid inclusion assemblages (FIAs) from various geologic environments were examined to assess the uncertainty associated with determining the temperature of a fluid event based on fluid inclusion homogenization temperatures (Th). A fluid event is defined as a physical or chemical process such as the healing of a microfracture or the formation of a growth zone in a crystal that occurs in the presence of a fluid phase and results in trapping of fluid inclusions to form an FIA. Examination of data from a large number of fluid events collected within a rigorous temporal and spatial (paragenetic) framework forms the basis for developing a complete fluid pressure-temperature-composition (PTX) history. The range in homogenization temperatures of fluid inclusions within well-constrained FIAs was determined, and the minimum (smallest) range in Th, the median range in Th, and the first quartile (Q1 at 25%) and third quartile (Q3 at 75%) of the median Th ranges were calculated for different fluid environments, including the following: 1. Low-permeability sedimentary environments: 49 out of 144 FIAs show a range in Th of ≤1°C; the median range = 2°C (from Q1 = 1°C to Q3 = 3.7°C). 2. Mississippi Valley-type deposits: 11 out of 137 FIAs show a range in Th of ≤1°C; the median range = 4.1°C (from Q1 = 2.3°C to Q3 = 8.3°C). 3. Epithermal deposits: 102 out of 923 FIAs show a range in Th of ≤1°C; the median range = 9°C (from Q1 = 3.8°C to Q3 = 19°C). 4. Porphyry-type deposits: 24 out of 271 FIAs show a range in Th of ≤ 1°C; the median range = 15°C (from Q1 = 8°C to Q3 = 30°C). 5. Orogenic Au deposits: 21 out of 231 FIAs show a range in Th of ≤1°C; the median range = 8.7°C (from Q1 = 4°C to Q3 = 20°C). While all environments show some FIAs in which all the fluid inclusions homogenize at essentially the same temperature (range = ≤1°C), we propose that the median range in Th reported here represents a reasonable and achievable constraint on the uncertainty associated with the temperature of a fluid event in the environments examined. In summary, the temperature of a fluid event, as represented by the range in Th of the fluid inclusions within an individual FIA, can be constrained to better than 15°C in all environments examined, and in Mississippi Valley-type and low-permeability (deep) sedimentary basin environments, the range in Th can be constrained to better than 2°C. The processes that produce variability in Th of fluid inclusions within an FIA are many and include natural variations in temperature, pressure, or fluid composition during trapping of the FIA, trapping of immiscible fluids, various forms of reequilibration in nature such as necking, stretching, and leakage, and modification of the inclusions during sample preparation and data collection. If the range in homogenization temperature for an individual FIA is found to be greater than the median range determined here for that environment, then assessment of the cause of the variability might provide useful information concerning the tra...

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Section: Potential Causes For Th Variation Within Fiasmentioning

confidence: 94%

How Precisely Can the Temperature of a Fluid Event be Constrained Using Fluid Inclusions?

Fall

Bodnar

2018

Economic Geology

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“…Mine tailings repositories are unwanted and uneconomic materials from the mineral processing deposited exposure in the air. Tailings often contain elevated concentrations of metal(loid)s, which are potentially toxic (Lecumberri-Sanchez et al, 2014;Hudson-Edwards, 2016). Abandoned nonferrous metal(loid) tailings (i.e., facilities having no operator or successor) have received considerable attention around the world because they represent a risk for the environment and human health (Aleksandrovskii et al, 2015;COM, 2016).…”

Section: Introductionmentioning

confidence: 99%

Bacterial diversity in typical abandoned multi-contaminated nonferrous metal(loid) tailings during natural attenuation

Liu

Yao

Wang

et al. 2019

Environmental Pollution

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Abandoned nonferrous metal(loid) tailings sites are anthropogenic, and represent unique and extreme ecological niches for microbial communities. Tailings contain elevated and toxic content of metal(loid)s that had negative effects on local human health and regional ecosystems. Microbial communities in these typical tailings undergoing natural attenuation are often very poorly examined. The diversity and inferred functions of bacterial communities were examined at seven nonferrous metal(loid) tailings sites in Guangxi (China), which were abandoned between 3 and 31 years ago. The acidity of the tailings sites rose over years of site inactivity. Desulfurivibrio, which were always coupled with sulfur/sulfide oxidation to dissimilate the reduction of nitrate/nitrite, were specific in tailings with 3 years abandonment. However, genus beneficial to plant growth (Rhizobium), and iron/sulfur-oxidizing bacteria and metal(loid)-related genera (Acidiferrobacter and Acidithiobacillus) were specific within tailings abandoned for 23 years or more. The increased abundance of acid-generating iron/sulfur-oxidizing and metal(loid)-related bacteria and specific bacterial communities during the natural attenuation could provide new insights for understanding microbial ecosystem functioning in mine tailings. OTUs related to Sulfuriferula, Bacillus, Sulfurifustis, Gaiella, and Thiobacillus genera were the main contributors differentiating the bacterial communities between the different tailing sites.Multiple correlation analyses between bacterial communities and geochemical parameters indicated that pH, TOC, TN, As, Pb, and Cu were the main drivers influencing the bacterial community structures. PICRUSt functional exploration revealed that the main functions were related to DNA repair and recombination, important functions for bacterial adaptation to cope with the multi-contamination of tailings. Such information provides new insights to guide future metagenomic studies for the identification of key functions beyond metal-transformation/resistance. As well, our results offers novel outlooks for the

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“…Three proposed wolframite standards of MTM, YGX, and WT are more homogeneous than others, but also have variable U and common Pb shown in the Tera-Wasserburg Concordia diagram in previous and our studies. 10,20,21,23 Moreover, they were with different ID-TIMS U-Pb ages of 334.4 AE 1.7 and 316.7 AE 5.8 Ma, 152.8 AE 2.0 and 160.9 AE 0.7 Ma, and 95.2 AE 1.0 and 104.3 AE 0.5 Ma. [17][18][19][20]23 Thus, if there are no concordant YGX spots, a combined calibration method using wolframite YGX and NIST glasses (e.g., NIST612) to correct the mass fractionation of 238 U/ 206 Pb and 207 Pb/ 206 Pb isotope ratios of the unknowns, respectively, is to be used.…”

Section: Calibration Strategy and Data Reductionmentioning

confidence: 99%

“…17)), and hübnerite WT (95.2 AE 1.0 Ma (ref. 20)), can used to calibrate these wolframite-type minerals. However, whether these reference materials can be used to calibrate scheelite or whether matrix effects exist between scheelite and wolframite is still unclear.…”

Section: Introductionmentioning

confidence: 99%

Two reliable calibration methods for accuratein situU–Pb dating of scheelite

Tang¹,

Han²,

Lan³

et al. 2022

J. Anal. At. Spectrom.

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Genetic relationship between silver–lead–zinc mineralization in the Wutong deposit, Guangxi Province and Mesozoic granitic magmatism in the Nanling belt, southeast China

Cited by 34 publications

References 42 publications

How Precisely Can the Temperature of a Fluid Event be Constrained Using Fluid Inclusions?

How Precisely Can the Temperature of a Fluid Event be Constrained Using Fluid Inclusions?

Bacterial diversity in typical abandoned multi-contaminated nonferrous metal(loid) tailings during natural attenuation

Two reliable calibration methods for accuratein situU–Pb dating of scheelite

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