The collection of representative subsurface samples is key to the development of relevant and accurate geotechnical evaluations and assessments.  There are a wide variety of sampling methods available, and each is suited to a particular exploration method(s) and information goals.  Oftentimes, multiple sampling methods will be utilized for a given project depending upon the nature of the subsurface materials and the scope of the proposed design.  We have extensive experience with several common geotechnical sampling methods, and we have summarized the general purpose and procedure for each method and some their individual pros and cons. 

Channel sampling is a technique used by geologists to collect small chips of rock over a specified linear interval. The objective is to cut a linear channel across the vein or orebody for the most representative samples possible over the designated interval. Channel sampling is important because it allows for a representative sample to be acquired, which is not biased.

Channel samples are typically collected in succession along a sample line that is laid out in advance using a measuring tape. The sample line is designed to cross the area of interest. Channel samples can be collected along surface trenches, floors or walls of underground workings.

Well-suited to remote, greenfield property exploration, our backpack drill programs are ideal for near-surface initial sampling (soil or rock) and geologic mapping. 

- Lightweight/man-portable diamond core drill

- Fast penetrating to depths of up to 5m (16ft). Drillhole depth to 10m (32 ft) under ideal conditions.

- 41mm hole diamter (36mm BQ core) or 25mm hole diameter (15mm core)

- Minimal footprint disturbance

- No permitting requirements in most jurisdictions

- Can replace trenching in inaccessible areas

- Penetrate lacustrine clays to sample bedrock-related soils below

- Build overburden or bedrock stratigraphy

- Test depth to bedrock and collect bedrock sample

- Collect structural data

- Collect soil or rock samples through swamps

- Follow up on high-grade rock samples

- Prove continuity of veins

Lightweight and compact, the Winkie is particularly useful in rough mountainous terrain where it can be airlifted by helicopter or easily carried by two men.

Powered by a 35hp, portable hydraulic engine, the Winkie is the ideal drill for hard-to-reach places. Due to the vacuum carburation, system, the Winkie performs efficiently at any angle and at high altitudes. Variable drilling speeds are achieved by a two-speed transmission.

Drill Features:

- Lightweight/man-portable diamond core drill

- Fast penetrating to depths of up to 30m (100ft). Drillhole depth to 100m (300 ft) under ideal conditions.

- AQTK hole diameter or 25mm hole diameter (15mm core)

- Minimal footprint disturbance

- No permitting requirements in most jurisdictions

- Can replace trenching in inaccessible areas

- Penetrate lacustrine clays to sample bedrock-related soils below

- Build overburden or bedrock stratigraphy

- Test depth to bedrock and collect bedrock sample

- Collect structural data

- Collect soil or rock samples through swamps

- Follow up on high-grade rock samples

- Prove continuity of veins