Case Examples

In order to prove the economic feasibility for exploitation of ore mineral resources in an acreage in Northern Germany an ORESCAN exploration survey were carried out.

Since 2012 several helicopter-borne surveys for detection and 3D imaging of ore deposits were performed in rough terrain in the Canadian Rocky Mountains




Helicopter-borne survey in Germany has clearly identified ore minerals and iheir distribution

Distribution of seismo-EM attribute OCP (Ore Concentration Potential) indicating extension and accumulation zones of heavy mineral placers

In co-operation with the well established Canadian specialist Precision GeoSurveys several helicopter-borne multi sensor surveys were performed since 2012.

Main task is to demonstrate the direct detection ability of ORESCAN method and thus supporting conventional Airborne Geophysics for an entry into the Canadian mining market.

Helicopter Survey in Northern Germany

A large area around the villages Midlum and Dorum in Northern Germany is prospective to find heavy mineral placers. The general ore-presence was discovered locally by chance during a drilling campaign for groundwater exploration. The ore minerals are consisting mainly of ilmenite and rutile in varying concentrations within a 4 to 8 m thick sand layer in a depth of about 50 m.

In order to prove the economic feasibility for exploitation of these mineral resources further detailed geophysical explorations were carried out. In the Figure the results of a helicopter-borne seismo-electromagnetic ORESCAN survey within a part of the concession area are represented. 

From data acquisition and data processing the distribution of the seismo-EM spectral attribute OCP (Ore Concentration Potential) is obtained.

The geophysical measuring result allows the following threefold geological conclusions:

Threshold-exceeding OCP-values are verifying that the sensitivity of the system was excellent to detect the ore occurrence, even though only semi-conductive ore minerals are present

A continuous level of increased OCP indicates and maps the field extent of the heavy mineral ore deposit

Single OCP anomaly peaks within the ore deposit field are indicating local zones of increased ore accumulations

PDFORESCAN Case Example Germany

ORESCAN Surveys by Helicopter in Canada

e.g. partial results: Lateral Resolution of EM signals indicates ore accumulations
in rough terrain at the Rocky Mountains



Data acquisition (helicopter-borne):
HSC Continuous automatically measurement of the electromagnetic field
HSC Low and slow survey flights
HSC Survey line spacing 50 to 100m

Data processing:
HSC Signal analysis
HSC 3D inverse modeling

Data evaluation and visualisation:

HSC Overlay contour plots comprising 3D informationen about depth and source signal intensity distribution
HSC 2D and 3D visualisation of results

Final report:
HSC Geological interpretation of geophysical results referring the ore/graphite occurence potential with depth estimation

Advantages & Features

OSC Efficient de-risking tool
OSC Differentiation between presence or absence of metallic ore and graphite deposits
OSC No geographical / surface / infrastructure
related constraints
OSC No environmental limitations
OSC No need for ground permitting
OSC Quick turn-around
from preparation through data acquisition and processing to result delivery with final report

About us

> GEO EXPLORATION TECHNOLOGIES - GET - is a German geophysical service company experienced in exploration of subsurface resources, structures and properties serving numerous national and international projects since 1986.