| GMRAP ID | 8338 |
|---|---|
| Tract name | Pacific Margin (142pCu8514) |
| Included sites | Central, Valley, Freedom |
| Site status | prospect |
| Country | Russian Federation |
|---|---|
| State or province | Khabarovskiy kray |
| Geographic location | 136.8961, 49.9165 |
| Geologic map unit | 136.8961, 49.9165 |
| Nearby data |
| Deposit type | Porphyry copper |
|---|---|
| Age determination method | Geologic inference |
| Age range | Late Jurassic–Cretaceous–Paleogene |
| Age reference | geologic inference |
| Minerals | arsenopyrite, bismutite, bornite, chalcocite, chalcopyrite, covellite, cuprite, galena, goethite, hematite, jarosite, limonite, magnetite, malachite, neotocite, pyrite, pyrrhotite, sericite, sphalerite |
| Associated rocks | diorite, granodiorite, quartz diorite porphyrite stock, diorite porphyry and granodiorite porphyry dikes, sedimentary rocks |
| Tectonic setting | mixed |
| Stratigraphic age | Late Jurassic–Cretaceous–Paleogene |
| Development status | Occurrence |
|---|---|
| Major commodities | Cu |
| Minor commodities | Au |
| Gold-Moly ratio | -9999 |
| Comments | Potential for open-pit minable porphyry-type Cu-Au mineralization; 14 target areas within district-scale 16 by 5 km intrusive corridor concealed beneath shallow cover of soil and vegetation; drill targets focused on geophysical and soil geochemical anomalies. As of 2013, 169 drill holes (>57,800 m) delineating near surface porphyry copper targets at 4 of 14 known areas (90% of intercepts >0.3% Cu Eq.). Near-surface zones ( within 0.550 m of the surface) of variable chalcocite enrichment grading into chalcopyrite-rich and into chalcopyrite-bornite-magnetite mineralization. Copper/gold porphyry mineralization style similar to Oyu Tolgoi in Mongolia; other high grade zones include: drill intercepts of 43.9 m at 1.23% Cu and 0.53 g/t Au, 12.8 m at 1.22% Cu and 0.08 g/t Au. Rich central zone drilled at 200 m spacing. Valley intercepts include: 99.4 m averaging 0.69% Cu and 0.40 g/t Au within a broader zone of 459.2 m at 0.47% Cu and 0.21 g/t Au; 56.0 m averaging 0.72% Cu and 0.32 g/t Au within a broader zone of 410.5 m at 0.43% Cu and 0.18 g/t Au; 134.5 m averaging 0.57% Cu and 0.28 g/t Au within a zone of 462.3 m averaging 0.41% Cu and 0.19 g/t Au. |
|---|---|
| Study area name | Northeast Asia |
| References | Fortress Minerals Corp. (2009); Fortress Minerals Corp. (2010); Andrei F. Chitalin (written commun., 2009); Eurasian Minerals Inc. (2012); Eurasian Minerals Inc. (2013) |
| Site reference | Mihalasky, Ludington, Alexeiev, and others (2015) |