Data Collection and Mapping
Exploration Technique: Data Collection and Mapping
|Exploration Technique Information|
|Exploration Group:||Field Techniques|
|Exploration Sub Group:||Data Collection and Mapping|
|Parent Exploration Technique:||Field Techniques|
|Information Provided by Technique|
|Lithology:||Map surface geology and hydrothermal alteration. Bulk and trace element analysis of rocks, minerals, and sediments. Identify and document surface geology and mineralogy. Rapid and unambiguous identification of unknown minerals.|
|Stratigraphic/Structural:||Locates active faults in the area of interest. Map fault and fracture patterns, kinematic information|
|Hydrological:||Can reveal whether faults are circulating hydrothermal fluids. Map surface manifestations of geothermal systems.|
|Thermal:||Identify and delineate shallow thermal anomalies. Map surface temperature.|
Recent miniaturization of components of traditional laboratory-based analytical instruments has enabled the development of portable XRD and XRF devices that can be used in the field to enhance traditional mapping techniques. These tools can be used to analyze the bulk composition of rock, mineral, and sediment samples and to identify unknown minerals in the field, thereby assisting mappers in identifying hydrothermal alteration products that visually difficult to distinguish.
Shallow temperature probe surveys are an extremely useful and cost-effective tool for approximating the temperatures of deeper geothermal systems and mapping shallow thermal anomalies in order to find blind geothermal systems. These surveys are only effective if the geothermal system is not overlain by a cold groundwater aquifer, which will mask the temperature anomaly that could be seen in a shallow survey. Shallow temperature surveys are often conducted prior to drilling a temperature gradient borehole.
Reports of portable XRF and XRD analyses in geothermal exploration are scant, as these techniques have only been available for the past decade. Potential uses include detailed characterization of lithologic units, identification of unrecognized hydrothermal minerals, and differentiation of optically similar clays and mixed layer clays that form from distinct different weathering and hydrothermal alteration processes.
- Field Techniques
- Data Collection and Mapping
- Field Sampling
No exploration activities found.