Formation pathways of Precambrian sedimentary pyrite: Insights from in situ Fe isotopes

Dupeyron, Juliette; Decraene, Marie-Noëlle; Marin‐Carbonne, Johanna; Busigny, Vincent

doi:10.1016/j.epsl.2023.118070

Cited by 8 publications

(4 citation statements)

References 70 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The number of microscale δ 56 Fe analyses in pyrite, measured either by SIMS and/or LA-MC-ICP-MS, has increased drastically over the last 10 years (Agangi et al 2015, Czaja et al 2018, Decraene et al 2021a, Decraene et al 2021b, Dupeyron et al 2023, Galić et al 2017, Harazim et al 2020, Liu et al 2022, Marin-Carbonne et al 2020, Marin-Carbonne et al 2014, Nishizawa et al 2010, Virtasalo et al 2015, Virtasalo et al 2013, Yoshiya et al 2012, Yoshiya et al 2015a, Yoshiya et al 2015b, Zhang et al 2022a, Zhang et al 2022b, Zheng et al 2018. The pioneering work of Whitehouse and Fedo (2007) developed and proposed to use natural pyrite originating from the Balmat deposit (Adirondack Mountains, New York) as a Fe reference material for SIMS measurements.…”

Section: Discussionmentioning

confidence: 99%

“…Interestingly, Dupeyron et al . (2023) compiled available microscale δ 56 Fe and found an overall wider isotopic variability, i.e., ‐4 to +4‰, preserved in Precambrian sedimentary rocks opening a new avenue for in situ Fe isotope investigation.…”

Section: δ56fe (‰) 2s δ57fe (‰) 2s N Methods Referencementioning

confidence: 99%

“…Indeed, over Earth's history the overall pyrite bulk δ 56 Fe variability ranges between -4 and +1‰, allowing SIMS δ 56 Fe investigation at the pyrite population level (e.g., Decraene et al 2021b, Harazim et al 2020, Whitehouse and Fedo 2007 and/or internal grain scale (e.g., Marin-Carbonne et al 2014). Interestingly, Dupeyron et al (2023) compiled available microscale δ 56 Fe and found an overall wider isotopic variability, i.e., -4 to +4‰, preserved in Precambrian sedimentary rocks opening a new avenue for in situ Fe isotope investigation.…”

mentioning

confidence: 99%

See 2 more Smart Citations

SIMS Iron Isotope Measurements of the Balmat Pyrite Reference Material: A Non‐Unique δ⁵⁶Fe Signature

Pasquier,

Rego,

Dupeyron

et al. 2024

Geostandard Geoanalytic Res

Self Cite

View full text Add to dashboard Cite

In situ iron isotope ratios (δ56Fe) in sulfide measured by secondary ion mass spectrometry (SIMS) can provide valuable information on several of Earth's surface processes. SIMS relies on the use of a matrix‐matched reference material to correct for instrumental mass fractionation. To date Balmat pyrite has been widely used as a reference material, on the assumption of its homogeneous δ56Fe composition. However, several studies have reported divergent bulk δ56Fe values, which may jeopardise its use. Here, we combined bulk solution MC‐ICP‐MS and in situ SIMS δ56Fe measurements on two Balmat batches: the Balmat‐Original published in Whitehouse and Fedo (2007) and Balmat‐UNIL. Despite similar compositions, this study demonstrates the existence of two isotopically distinct Balmat populations. With respect to Balmat‐Original (δ56Fe = ‐0.39 ± 0.05‰, 2s), Balmat‐UNIL is isotopically 'lighter' with a bulk solution MC‐ICP‐MS composition of ‐1.46 ± 0.024‰. Additionally, Balmat‐UNIL has two subpopulations: the first is characterised by δ56Fe values of ‐1.46 ± 0.25‰, whereas the second agrees with the original Balmat batch. In each Balmat‐UNIL subpopulation, the intra‐grain and inter‐grain variabilities are sufficient to use Balmat as a reference material for δ56Fe isotope measurements by SIMS. This study revealed at least two end‐member compositions of Balmat pyrite and calls for a careful batch‐specific determination of bulk δ56Fe.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: δ56fe (‰) 2s δ57fe (‰) 2s N Methods Referencementioning

confidence: 99%

mentioning

confidence: 99%

See 1 more Smart Citation

SIMS Iron Isotope Measurements of the Balmat Pyrite Reference Material: A Non‐Unique δ⁵⁶Fe Signature

Pasquier,

Rego,

Dupeyron

et al. 2024

Geostandard Geoanalytic Res

Self Cite

View full text Add to dashboard Cite

show abstract

“…In aerobic water, the content of pyrite is low with dominant idiomorphic pyrite and essentially no framboid pyrite. During the research, petroleum and natural gas geologists found that pyrite also affects the generation, preservation, and pore development of organic matter. − Shiley et al reported that the changes in Fe content of shale can be used to predict the area where a large amount of gas is accumulated. Nie and Zhang also reported that the maximum gas-bearing area in shale can be predicted based on the enrichment degree of pyrite.…”

Section: Introductionmentioning

confidence: 99%

Characteristics of Pyrite in Shale and Its Application in Shale Gas Enrichment Evaluation─a Case Study of Longmaxi Shales in the Xiang’exi Depression, China

Huang

Zhang

et al. 2023

Energy Fuels

View full text Add to dashboard Cite

Exploration and development of shale gas in China have made significant breakthroughs in recent years. Longmaxi shales in the Xiang'exi depression are the key targets for shale gas exploration in the middle Yangtze region. However, systematic studies on the authigenic minerals and their application in shale gas enrichment evaluation are insufficient. Therefore, in this study, pyrite was selected to characterize its morphology, grain size, and distribution characteristics, with the hope to identify the favorable exploration target of Longmaxi shales in the Xiang'exi depression. Herein, 44 unweathered core samples were collected from well LD-1 for experiments. The results show that Longmaxi shales can be divided into four lithological segments from the bottom to the top. L4�high-carbon clayey shale facies and high-carbon siliceous shale facies, exhibits the characteristics of an anoxic environment with a medium pyrite content, due to the insufficient supply of ferric ions. L3�medium-carbon siliceous shale facies, shows the characteristics of a hypoxic environment, with enhanced terrestrial supply and increased pyrite content. L2�low-carbon siliceous shale facies, has the characteristics of an aerobic environment with strong terrestrial supply, leading to a low content of pyrite. L1�medium-carbon clayey shale facies, shows the characteristics of a hypoxic environment similar to L3 but with the highest pyrite content among the four segments. Further research shows that the presence of pyrite is conducive to the development and preservation of organic pores, and shale with a higher pyrite content shows larger gas content and desorption gas/total gas content ratio, showing a greater exploration and development potential. Combined comprehensive analysis concludes that in the Xiang'exi depression, L4 of the Longmaxi shale is the optimal exploration target segment, followed by L1, then L3, while the L2 segment shows the lowest exploration potential.

show abstract

Characteristics, origins, and significance of pyrites in deep-water shales

Liang,

Ji,

Cao

et al. 2024

Sci. China Earth Sci.

View full text Add to dashboard Cite

Formation pathways of Precambrian sedimentary pyrite: Insights from in situ Fe isotopes

Cited by 8 publications

References 70 publications

SIMS Iron Isotope Measurements of the Balmat Pyrite Reference Material: A Non‐Unique δ⁵⁶Fe Signature

SIMS Iron Isotope Measurements of the Balmat Pyrite Reference Material: A Non‐Unique δ⁵⁶Fe Signature

Characteristics of Pyrite in Shale and Its Application in Shale Gas Enrichment Evaluation─a Case Study of Longmaxi Shales in the Xiang’exi Depression, China

Characteristics, origins, and significance of pyrites in deep-water shales

Contact Info

Product

Resources

About

Formation pathways of Precambrian sedimentary pyrite: Insights from in situ Fe isotopes

Cited by 8 publications

References 70 publications

SIMS Iron Isotope Measurements of the Balmat Pyrite Reference Material: A Non‐Unique δ56Fe Signature

SIMS Iron Isotope Measurements of the Balmat Pyrite Reference Material: A Non‐Unique δ56Fe Signature

Characteristics of Pyrite in Shale and Its Application in Shale Gas Enrichment Evaluation─a Case Study of Longmaxi Shales in the Xiang’exi Depression, China

Characteristics, origins, and significance of pyrites in deep-water shales

Contact Info

Product

Resources

About

SIMS Iron Isotope Measurements of the Balmat Pyrite Reference Material: A Non‐Unique δ⁵⁶Fe Signature

SIMS Iron Isotope Measurements of the Balmat Pyrite Reference Material: A Non‐Unique δ⁵⁶Fe Signature