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Copper grade is the concentration of copper in the ore rock. To calculate the grade of copper for the sample geologists use the equation amount of copper metalamount of copper ore rock100 2. If a deposit area has 200lbs of copper in 10000lbs of ore rock what is the grade 200100001002 3. If a deposit area has 6 tons of copper in .
rized in the Petrology of Associated Igneous Rocks section. For porphyry copper deposits in general the compositions of the shallow intrusions that host porphyry copper deposits indi-cate that the deep melt reservoirs from which both the shallow intrusions and the ore
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Sulfides and arsenides accompany gold-platinum in the fracture fillings. Sulfide-rich zones dominated by pyrite and occurring in mafic host rocks usually accompany the richest ores in the district. Actual production from the Centennial Ridge district is unknown. However the Centennial mine produced an estimated 4500 ounces of gold.
May 28 2014 Ore Minerals. Copper in these deposits generally occurs in copper-iron sulfide minerals such as chalcopyrite CuFeS 2 and bornite Cu 5 FeS 4. Brassy chalcopyrite is one of the common ore minerals in porphyry deposits. Over time weathering of the near-surface rocks and the infiltration of surface water can cause secondary copper-bearing .
high-grade ores in the Copper Mountain district British . bonate-bearing host rocks calc-silicate minerals such as gar- . dykes and volcanic rocks that are coeval with ore-related.
May 28 2014 Ore Minerals. Copper in these deposits generally occurs in copper-iron sulfide minerals such as chalcopyrite CuFeS 2 and bornite Cu 5 FeS 4. Brassy chalcopyrite is one of the common ore minerals in porphyry deposits. Over time weathering of the near-surface rocks and the infiltration of surface water can cause secondary copper-bearing .
Jul 29 2013 Classification of Host Rocks. The Earths crust primarily composed of lighter minerals formed of lighter elements. As we travel deeper within the earth heavier elements and minerals dominate. One method of classifying rocks is by this association which considers both the composition and conditions of formation.
Volcanic Exhalative Deposits Some ore deposits often show spatial relationships to volcanic rocks. They are conformable with the host and frequently banded suggesting sedimentary processes. Principal constituent is pyrite with lesser chalcopyrite aphalerite galena barite and Ag-Au.
Jan 22 2015 IOCG Iron Oxide Copper Gold Ore Deposits goes with porphyries as they are also loosely associated with a large felsic intrusions and form at moderate depths unlike the dominantly tertiary porphyries IOCGs tend to be much older and are
Copper grade is the concentration of copper in the ore rock. To calculate the grade of copper for the sample geologists use the equation amount of copper metalamount of copper ore rock100 2. If a deposit area has 200lbs of copper in 10000lbs of ore rock what is the grade 200100001002 3. If a deposit area has 6 tons of copper in .
The petrology of the host rocks hydrothermal alteration assemblages ore mineral associations fluid inclusions and the sulfur and oxygen isotopes of ores are comparable to those in Phanerozoic and reported Precambrian porphyry-copper systems and the Malanjkhand deposit has important implications for both metallogenic models for and .
Many ores are only found in some host rocks and different rocks can have different ore qualities. Examining a rock while holding Sneak H will provide information about which ores can appear in that rock type. Ores are found in shallow deposits and deep deposits. The tables below provide information about disc generation for each ore type .
The Cretaceous sediment-hosted copper deposits of San Marcos Coahuila Northeastern Mexico An approach to ore-forming processes. By Ruth Estrada. Tectonic inversion in a segmented foreland basin from extensional to piggy back settings The Tucum n basin in NW Argentina.
Volcanic Exhalative Deposits Some ore deposits often show spatial relationships to volcanic rocks. They are conformable with the host and frequently banded suggesting sedimentary processes. Principal constituent is pyrite with lesser chalcopyrite aphalerite galena barite and Ag-Au.
The Deep ore body is contained in a synformal structure with a steep 63 -70 and extensive southern limb. The dip is to the north at 55 fifty-five degrees near surface and varies from almost sub horizontal to 40 in the lower western portion of the ore bodies. The contacts of the massive sulphide ore with the host rock are sharp.
GEOCHEMISTRY OF HOST ROCKS IN CHESHMEH GAZ COPPER DEPOSIT CENTRAL IRAN. October 2014 Conference Physical - Chemical Data in Geology International Conference Moscow . Ore minerals include .
However based on a comprehensive study and comparative analysis of three important porphyry copper belts the authors hold that instead of being a typical arc magmatic rock the most potential ore-bearing porphyry is a kind of rock rich in SiO 256 Al 2O 315 Srmostly400 10 -6
host types for copper ore host types host rock-types Latitude amp Longitude N46 3000 - N51 4000 W59 1960 - W52 3000 View Full GeoRef Record. POWERED BY . Citing articles via. Google Scholar. CrossRef. Related Articles. D Goldschmidt Abstracts 2013
Host rocks Cyprus-type deposits are hosted by submarine mafic-volcanic rocks and their altered equivalents typically in brecciated rocks commonly associated with pillow lavas which have good buffering capacity. Host-rocks for Kuroko-type deposits range from basalt to rhyolite which have high and low buffering capacities respectively.
Mineral 1836. 39. This is a slice of Stone Hill Ore composed of mainly two just minerals - mainly pyrrhotite with some brighter spots of Chalcopyrite. Pyrrhotite Chalcopyrite. Stone HIll Mine Wood Copper Mine Mineral 1836. This is a close up view of this ore sample as pictured above.
systems is broadly dependent upon hypogene ore mineralogy lithology of host rocks and character of alteration Titley amp Marozas 1995. Ideal conditions for formation of supergene suldes are high pyrite chalcopyrite ratios in hypogene ore hosted in felsic igneous rocks or quartz-sericite or quartz-K-feldspar
A well known aspect of ore deposit expression is the association of particular ore types with particular host rock assemblages i.e. the ore-host rock association e.g. Stanton 1972. This association broadly reects the geological environment and processes that have formed the ore.
