Concepts for geochemical gold exploration based on the abundance and distribution of ultrafine gold
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Cited by (42)
Evidence of metal migration over concealed gold deposit in loess terrain and its prospecting significance
2022, Applied GeochemistryCitation Excerpt :Owing to the slow and complex characteristics of element migration through sediment cover, the mechanism behind this process remains unclear, restricting and complicating dataset interpretation and precluding the differentiation of false and negative anomalies. Many migration mechanisms have been proposed by geochemists in the previous decades, including groundwater flow (Cameron, 1998; Cameron et al., 2004; Noble et al., 2013b; Zhang et al., 2020), capillary rise (Mann et al., 2005; Anand et al., 2014), evaporation (Mann et al., 2005), electrochemical process (Smee, 1983; Goldberg, 1998; Hamilton, 1998; Hamilton et al., 2001, 2004a, 2004b), biological processes (Dunn, 2007; Anand et al., 2014; 2014; Lintern, 2007; 2013), and transportation by geogas (Kristiansson and Malmqvist, 1982; Nilson et al., 1991; Wang et al., 1995, 1997, 2011; Xie et al., 1999; Cao et al., 2009; Noble et al., 2013a; Anand et al., 2014; Jiang et al., 2019). In the overall process of ore-related metal migration, more than one mechanism drives the movement of elements from the mineralization to the Earth's surface.
Tracing concealed gold deposits using mercury isotopes in surface soils: A study from the Shuiyindong gold deposit, Guizhou province, China
2022, Journal of Geochemical ExplorationCitation Excerpt :Deformation of Au-bearing crystals at depth, such as pyrite, could result in the formation of ultra-fine Au particles at micro- to nano-scale around the deep Au ore bodies (Li et al., 2020). Ultra-fine Au particles are mobile because they can be adsorbed onto the surfaces of geogas bubbles and migrate with the bubbles upwards to the surface (Wang et al., 1995, 1997). Arriving at the surface, Au particles could be trapped by Fe and Mn oxide coatings, clay minerals, colloids, soluble salts, and secondary carbonates in soils (Schuster, 1991; Wang et al., 1995, 1997; Yin et al., 1997).
Maximizing drilling information in greenfields exploration: Linking the fabric and geochemical footprint of the basement to the surface in South Australia
2022, Journal of Geochemical ExplorationCitation Excerpt :This challenge is enhanced in regions characterised by low-relief landscapes and deeply weathered profiles (e.g., Australia, West Africa, China, India, Brazil; Wang et al., 2016; González-Álvarez et al., 2020a and references therein). In this geological context, surface geochemical surveys (e.g., soil, laterite, calcrete, vegetation) are standard techniques widely used in mineral exploration to delineate surface geochemical anomalies that could be used as footprints to vector towards mineralized basement (e.g., Smith et al., 1987; Butt and Zeegers, 1992; Wang et al., 1995; Chen et al., 2002; Anand and Butt, 2010; Lintern, 2015; Butt, 2016; Chardon et al., 2018; Winterburn et al., 2019; Gray et al., 2019; Noble et al., 2019). Supported by geophysical datasets (magnetics, gravity, radiometrics, airborne electro-magnetics, induced polarisation, etc.) and remote sensing satellite technologies, surface geochemical surveys are planned, undertaken, and often followed up by drilling and down-hole geochemical sampling (e.g., chips from reverse circulation drilling, RC; powders from air core drilling, AC).
Targeting deep-seated gold deposits: A study from the qujia gold deposit, Shandong province, China
2021, Applied GeochemistryBacillus cereus, a geobiological marker for gold prospecting isolated from soil from the Jiaodong Gold Mine
2020, Journal of Geochemical ExplorationCitation Excerpt :Nanometer-sized Au particles can migrate with the ascending flow gases and trapped in the soil (Wang et al., 2016; Hough et al., 2011). The principal forms of Au in overburden soils occur not only as ionic or complex forms, but also as ultrafine particles dispersed in, or bound onto, organic matter, water-soluble salts, iron and manganese oxides, colloidal particles or clay minerals (Wang et al., 1995; Wang, 1998). Au in pedogenic carbonates, Mn-oxides and bounded in organic carbon were easily dissolved, while Au in Fe-oxides displayed a lower solubility (Reith et al., 2005).
The characteristic of microstructural deformation of gold bearing pyrite in Jiaodong: The links between nanoscale gold enrichment and crystal distortion
2020, Ore Geology ReviewsCitation Excerpt :Nevertheless, the old method of TEM systems couldn’t directly detect the crystal lattice-bound gold and other trace elements in pyrite due to their low concentrations. Ultrafine gold particles in micro- to nanoscale were found at Jiaodong gold deposits and applied in geochemical exploration for concealed gold deposits (Wang et al., 1995; Ye et al., 2014). However, we did not have a good understanding of the formation process of the nanoscle gold.