Following the metals
Geochemistry uses the chemical fingerprint of soils, rocks, and sediments to find areas enriched in metals. Even where a deposit is buried, weathering and erosion can disperse trace elements into overlying soils and drainages, producing anomalies that point explorers toward the source.
Because sampling is relatively cheap and non-invasive, geochemistry is one of the first tools deployed during reconnaissance and one of the most cost-effective ways to cover large, underexplored ground.
Common sampling methods
Soil sampling on a grid is the standard method for outlining anomalies over a target area. Rock-grab and channel samples test outcrop and veins directly, while stream-sediment sampling is used for very broad regional surveys. Each sample is analysed in an accredited laboratory by an assay that measures element concentrations.
Eastfield's Hedge Hog property illustrates where sampling fits in the workflow: systematic soil sampling and ground geophysics are planned as the first step toward defining drill targets on the early-stage claims. Any reported values are subject to verification by a Qualified Person.
Interpreting anomalies
A geochemical anomaly is a value notably above local background. Its significance depends on its size, intensity, coherence, and the surrounding geology. A tight, high-contrast anomaly that sits on a favourable structure and coincides with a geophysical response is far more compelling than a scattered, weak one.
Quality control matters: standards, blanks, and duplicate samples are inserted into batches so that laboratory accuracy and precision can be monitored. Rigorous QA/QC underpins confidence in every dataset that follows.
From anomaly to drill target
Geochemistry rarely stands alone. Explorers integrate it with mapping and geophysics to convert a surface anomaly into a ranked, three-dimensional drill target. Only then is the much greater expense of drilling justified.
This article provides general educational information about mineral exploration. For information concerning Eastfield's mineral projects, readers should refer to the Company's project disclosures, news releases and continuous-disclosure filings on SEDAR+.