Bulk leach extractable gold (BLEG) was developed in the 1980s to reduce the impact of nuggety gold. Today, it can be used in exploration for trace gold determinations to provide robust, consistent results. The large sample size utilised can help decrease the influence of coarse gold making results more reproducible.

Bulk leach extractable gold, more commonly shortened to BLEG, is a geochemical sampling/analysis tool used during exploration for gold. It was developed in the early 1980s to address concerns relating to the accurately measuring fine grained gold, and dealing with problems associated with sample heterogeneity.

2020年10月1日 · Stream sediments are the preferred sampling method in regional geochemical exploration for Au deposits in regions displaying well-defined drainage systems. Analysis of either bulk leach extractable gold (BLEG) and aqua regia-extractable multi-element analysis of fine fraction sediments are two common analytical approaches.

2003年5月1日 · Exploration of large areas for Au has led the Bureau de Recherches Géologiques et Minières to compare the efficiency of conventional fine-fraction geochemistry with BLEG (bulk cyanide leach extractable gold) sampling for low-density drainage surveys.

2019年5月1日 · A hundred percent of the known gold deposits and prospects discovered in the study area are delineated by BLEG Au stream sediment anomalies by N-S and C-A multifractal modeling. Moreover, 89% of known gold prospects of the study area are delineated within the recognized anomalous zones of Au in −80# stream sediment data.

2021年5月1日 · For mapping of Au anomalies from the BLEG dataset, singularity model as one of the most robust fractal models developed for this purpose (Cheng, 1999). In the present study, drainage sediment dilution effect (DE) was also taken into account to recognize and enhance significant Au anomalies.

BLEG (Bulk Liquid Extractable Gold) involves weighing a 1-2 kg sample into a polyethylene bottle, adding an appropriate cyanide solution (0.25% to 1% NaCN) and bottle rolling for a determined period of time.

2018年1月11日 · Golden Star Resources Limited conducts Bulk Leach Extractable Gold (BLEG) and Fire Assay methods on samples from its exploration program. Additionally, for mining control and as part of the...

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2017年7月6日 · In Au exploration the analysis of either Bulk Leach Extractable Gold (BLEG) or acid-extractable Au in the −80# (<180 μm) stream sediment fraction are the two most common approaches.