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Rhyolite Porphyry from Majuba Hill II
Source info:
| Author: | Silver Fox |
|---|---|
| Date: | 2014-08-20 14:00:00 |
| Blog: | Looking for Detachment  |
| URL: | http://highway8a.blogspot.com/2014/08/rhyolite-porphyry-from-majuba-hill-ii.html |
Summary:
GSN field trip Day 2: we're still at Majuba Hill. Continuing with our progression from left to right of rhyolite porphyry hand samples, we move on to Rock Number 3, a weakly mineralized version of the tourmalinized porphyry. (Rock 1 and 2 were seen here.) The feldspar sites in this rock sample contain needles of tourmaline, and powdery white sericite with a soft, blue green copper mineralContent analysis:
Geographic context:
| Location | Country | Latitude | Longitude |
|---|---|---|---|
| Porphyry | US | 33.8753 | -117.536 |
| Rhyolite | US | 36.9033 | -116.772 |
Keywords:
blue green copper, copper, feldspar sites, GSN field trip, in the field, Majuba Hill, powdery white sericite, rhyolite porphyry hand, Rock Number, sample contain needles, weakly mineralized version
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