Shared layer · In 16 states

Stream Concentrate Geochemistry

Explorer

Heavy mineral concentrate samples from streams. Panned or concentrated samples that reveal gold and indicator minerals like magnetite, garnet, and cinnabar.

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Stream Concentrate Geochemistry in Colorado, drawn over satellite imagery

Satellite imagery © Mapbox, © Maxar. Layer data from the sources named on each card.

About this layer

Stream concentrate samples test the heavier minerals separated from creek sediment. Concentrating the sample can make small traces easier to detect. Compare results with other concentrate samples, because they are not directly comparable with ordinary sediment or soil.

What it is for

Check the sample type, element and units in the legend before comparing readings. Look for patterns across nearby samples.

Limits

Sampling methods, depth and laboratory detection limits can differ. A high reading alone does not show a detectable nugget.

Plans

Where it works in USA gold.

Alabama Alaska Arizona California Colorado Georgia Idaho Montana Nevada New Mexico North Carolina Oregon South Carolina Utah Virginia Washington

Explorer

Pictures

Drawn in each state.

Satellite imagery © Mapbox, © Maxar. Layer data from the sources named on each card.

Source

Where the data comes from.

For Alabama, Arizona, California, Colorado, Georgia, Idaho, Montana, Nevada and 7 more

Data provided by the U.S. Geological Survey (USGS), Bureau of Land Management (BLM), U.S. Forest Service (USFS), and ReportAll USA (Licensed), licensed under USGS Public Domain and other applicable licenses USGS Public Domain

For Alaska

Data provided by the U.S. Geological Survey (USGS), the Alaska Division of Geological & Geophysical Surveys (DGGS), the Alaska Department of Natural Resources (DNR), Bureau of Land Management (BLM), U.S. Forest Service (USFS), and ReportAll USA (Licensed), licensed under USGS Public Domain and other applicable licenses USGS Public Domain

Legend

How it is drawn.

Streams / Concentrate

Concentration
Low
Medium
High

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Free to download on iPhone and Android.

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Scan with your phone camera to get the app

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Or open the web map

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