from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. Resembling jasper.
- n. A rare dense siliceous rock similar in appearance to chert.
from The Century Dictionary and Cyclopedia
- Same as jaspoid.
Sorry, no etymologies found.
The gangue is mainly fine-grained quartz or jasperoid, and barite.
It is highly encouraging to observe Carlin-style precious metal mineralized jasperoid/silica breccia in outcrop more than a kilometer away to the southeast.
During recent exploration in the Milagro Project area, an elongate outcrop of jasperoid/silica breccia was sampled and returned precious metal values ranging from 0.39 to
Bravo reports the presence of "auriferous lower plate carbonate rocks and jasperoid" locally on the eastern and southern portions of their Pete Hanson Project with
The breccia of the San Pedro mine is composed of clasts including jasperoid silica, altered calcareous siltstone, skarn, several igneous rock types, limestone, and breccia.
Of particular importance, geologic mapping has found that these same distal features (including a zone of breccia/brecciated limestone in-filled with abundant coarse-bladed barite, jasperoid mantos layers, jasperoid (+/- barite) veins/veinlets with anomalous copper and pathfinder metal content) can be traced in outcrop in continuous fashion for 1,200 meters semi-circular distance around the entire east and north sides of Cerro Cinchado (the down-faulted block).
In the 300,000 sq. meter area of jasperoid at the Cerro La Mina prospect, 189 well spaced jasperoid samples (approx. 50 meter centers) contain an average of 50 g/t Ag.with 10% of the samples containing over 200 g/t Ag. For 1.2 kilometers along the western contact of the jasperoid with the overlying volcanics, the jasperoid (86 samples) contains an average of 90 g/t Ag.of which 10% of the samples grade at an average of
The combination of IP and Resistivity has clearly identified the structures that control the distribution of the jasperoid.
The gold mineralization identified so far on the Maravillas Property is related to jasperoid occurrences controlled by a regional system of thrust faults with nearby and likely related silver and copper mineralization.
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