Coromoto Minerals
The 2001 Season at the Orchard
Mine
September-October
View into the Orchard Quarry October 22, 2001
The riddle of the Orchard pegmatite intensifies or perhaps the solution
is in front of our face and under or feet but the conclusion is not palatable.
What is clear at the moment is that the schist xenolith within the
vein is becoming the dominating feature. In the image above, the pegmatite
injection appears to have flowed around this blockage and forced its way
into the sidewall. At the top The portion of the pegmatite above the schist inclusion is dominated The portion of pegmatite that has been displaced left has all of the characteristics present in the more regular part of the vein. There is a mini quartz core with feldspar and abundant green and blue beryls. Some of these beryls are quite blue but unfortunately the amount of material is quite limited . |
As in the past, the interesting part of pegmatite is below the schist. The disturbing thing now is the schist is occupying a greater and greater volume with a concomitant reduction in pegmatite. What little pegmatite remains is quite interesting. We have mined into a zone rich in radioactives judging by the amount of very dark quartz and the appearance of golden beryls. In shot at the top some very large beryls are starting appear. Notice the striking orange beryl within the mass of black quartz. Removing some of this black quartz exposed a very large yellow beryl underneath the orange one. It demonstrates also how the green beryls trend to yellow within the dark quartz. While removing the quartz, several small yttrium(?) rich columbites popped out of the smoky quartz. Embedded in the quartz they were nearly impossible to see. ![]() Below the radioactive zone we found 3 basketball sized pockets. We had
not found pockets of any size for a considerable time within the main body
of the vein. These pockets contained small well developed microclines,
albites, a few beryl casts, and, of course, quartz crystals. There
were also some gray apatite singles to 2 cm. In the photo, Richard
is standing just to the right of a pocket exposed in the floor. The contacts
are clearly visible. |
Apatite on microline and albite with quartz crystals
Both specimens 9cm