(ii) Group II veins consist of a breccia
with angular rock fragments healed by calcite cement.
The phreatomagmatic breccia
XRD patterns show the presence of clay minerals (smectites and serpentine minerals) in addition to enstatite, quartz and carbonates (calcite and dolomite) (Fig.
By comparison, the suggested timing for the formation of the Osmussaar Breccia
is somewhat more broadly defined.
The first descriptions of this anomalous breccia
were made circa 1916 by August Foerste and Raymond Lamborn who identified this breccia
as "marl" dividing the Silurian Bisher and Lilley Members of the (then) West Union Formation (Schumacher 2002c).
It is collected as isolated crystals on datolite, prehnite or calcite, or directly attached to the walls of breccia
According to MAX Resource, the claims in the NUSTAR prospect area are located on the northwestern trend of uranium deposits in this area of Arizona, which contains the high-grade past producing Hacks Canyon mines, the Arizona 1 mine (currently on standby) and the EZ-1 and EZ-2 breccia
pipes recently purchased by Denison Mines Corp.
(1999) described grains with amorphous carbon coatings in the allochthonous breccia
of the Lappajarvi impact crater.
"There was once a plan, but no one talks about it anymore," Breccia
said, adding that funding for the new churches has dried up.
Four key structural components are recognized: (1) a tight anticlinal fold, which is oriented radically away from the inner crater; (2) breccia
on the crest of the anticline, along the thrust faults, and in thick accumulations; (3) inward-directed thrust faults; and (4) normal faults.
The surface exploration program, in preparation for a planned 10 hole drill program, has identified a major extension to the El Ocote breccia
pipe which contains previously reported resources totaling 16.2 million ounces of silver (indicated-11.0 million ounces; inferred-5.2 million ounces).
The mineralisation is hosted in quartz lodes carrying quartz, carbonate and adularia, and late-stage breccia
channels carrying bonanza gold grades.