Instant gold

My inaugural posting.

An article just recently published online in Nature Geoscience provides new insights into the origin of vein-hosted gold sytems (orogenic or ‘mesothermal‘ gold in the geological literature).  Weatherly and Henley have proposed ideas that link fault systems, fluid flow, earthquakes, and the genesis of large, orogenic gold deposits, in terms of a thermomechanical piston model.  Their results illustrate that fault jogs that are typically found associated with orogenic deposits become fluid-filled cavities during earthquakes.  These depressurization of fluids as they enter these jogs results in flash vaporization and the fluid drops out gold and associated quartz.  The results also illustrate that many large gold deposits form relatively rapidly on a geological time scale.  The work also builds on previous work on “seismic pumping” (http://tinyurl.com/cdpmeop) and other studies that have shown how rapid gold deposits form from hydrothermal fluids (e.g., http://tinyurl.com/awhms9h)

The original article is here at Nature Geoscience: http://tinyurl.com/buemgvb (requires subscription).

A companion article from Scientific American can be found here: http://tinyurl.com/cls69l6.

Advertisement
This entry was posted in Economic Geology, Geochemistry, Geology, Geophysics, Gold, Gold Deposits. Bookmark the permalink.

1 Response to Instant gold

  1. Bob P says:

    I heard about this research on a radio podcast recently. It’s good to hear about these things from different sources.

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s