Biotite chemistry as an indicator of hydrothermal deposit types and fluid sources: Insights from big data compilation, multivariate statistical analysis, and machine learning

Baidya, Abu Saeed; Maiti, Giridas; Mondal, Subhronil; Upadhyay, Dewashish

doi:10.1016/j.gexplo.2024.107442

Journal of Geochemical Exploration

2024

DOI: 10.1016/j.gexplo.2024.107442

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Biotite chemistry as an indicator of hydrothermal deposit types and fluid sources: Insights from big data compilation, multivariate statistical analysis, and machine learning

Abu Saeed Baidya,

Giridas Maiti,

Subhronil Mondal

et al.

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Gold in eskers and gyttja overlying auriferous till, Regnault deposit, Quebec

Cummings,

Orr,

MacDonald

2024

GEEA

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The Regnault gold deposit in Quebec, Canada, was discovered by Kenorland in 2020 following identification of a gold-in-till dispersal train. In 2022, two non-traditional media—eskers and organic lake-bottom mud (gyttja)—were sampled to determine if they likewise contained gold anomalies that vectored the mineral deposit. Striking, coherent (mappable) anomalies exist in both media. The gold-in-esker dispersal train has a similar pathfinder element association as the gold-in-till dispersal train (e.g., Te, W) but contains approximately twice the gold (average 73 ppb Au) in the <63 um fraction. It is hypothesized to be a meltwater-sorted version of the gold-in-till train, sourced from the erosional esker corridor some 3 km upflow. By contrast, the gold-in-gyttja dispersal train is substantially different than both the gold-in-esker and gold-in-till dispersal trains. It has lost significant association with pathfinder elements, contains an order of magnitude less gold (average 4.2 ppb Au), and is tentatively hypothesized to have a hydromorphic origin, sourced primarily from the gold-in-till dispersal train. The main takeaway from the study is that the sampling of any of these three media—eskers, gyttja or till—could have conceivably led to the discovery. Supplementary material: https://doi.org/10.6084/m9.figshare.c.7235784

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Gold in eskers and gyttja overlying auriferous till, Regnault deposit, Quebec

Cummings,

Orr,

MacDonald

2024

GEEA

View full text Add to dashboard Cite

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Biotite chemistry as an indicator of hydrothermal deposit types and fluid sources: Insights from big data compilation, multivariate statistical analysis, and machine learning

Cited by 1 publication

References 115 publications

Gold in eskers and gyttja overlying auriferous till, Regnault deposit, Quebec

Gold in eskers and gyttja overlying auriferous till, Regnault deposit, Quebec

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