Porphyry deposits are large low to medium grade deposits in which primary hypogene ore minerals are dominantly structurally controlled and are spatially and genetically related to felsic to intermediate porphyritic intrusions kirkham 1971 1972 the main metals in a porphyry are cu mo and smaller amounts of gold although sn w and ag can be found in some porphyry deposits kirkham.
Rich granite deposits.
Deposits of this group occur in hematite rich granite breccias olympic dam or metasedimentary metavolcanic breccias salobo carajas brazil and contain low grade disseminated uranium in association with cu au ag ree.
Iron rich sedimentary rocks are sedimentary rocks which contain 15 or more iron however most sedimentary rocks contain iron in varying degrees.
The deposit contains the world s largest uranium resources with more than 2 mtu at 230 ppm.
Granite is a natural stone quarried from large igneous stone deposits found around the world.
Granite crystallizes from silica rich magmas that are miles deep in earth s crust.
It can be found almost everywhere in rock soil rivers and oceans.
The stone is naturally quite rough and textured but when it is ground and polished during the countertop manufacturing process it takes on a smooth surface with rich.
Uranium ore deposits are economically recoverable concentrations of uranium within the earth s crust uranium is one of the more common elements in the earth s crust being 40 times more common than silver and 500 times more common than gold.
The majority of these rocks were deposited during specific geologic time periods.
The name appeared for the first time in works of the english botanists physician and philosopher caesalpinus in the 16th century.
The precambrian 3800 to 570 million years ago the early paleozoic 570 to 410 million years ago and the middle to late mesozoic 205 to 66 million years ago.
Many mineral deposits form near crystallizing granite bodies from the hydrothermal solutions that such bodies release.
The dimensions of the openings have a wide range from the massive veins of pitchblende at jachymov deposit czech republic to the narrow pitchblende filled cracks faults and fissures in some of the ore bodies.
Includes many vein deposits in granite deposits in adjacent meta sedimentary rocks and also disseminated mineralisation in granite.
The specimen shown here is about two inches five centimeters across.
These includes discrete single veins sheeted veins or systems of veins stockworks of interconnecting veins and fractures breccias and replacement zones in altered wall.
It begins as molten magma that flows into other rock structures and cools slowly.
There is potential for new deposits and deposit types hosting metallic minerals based on mineralization related to mafic ultramafic and granitoids rocks and faulting.
Known and potential ore deposits include cu au zn pb and associated minerals including ag.
Vein and greisen sn w deposits are magmatic hydrothermal systems and made up of simple to complex fissure filling quartz veins or replacement orebodies both proximal and distal types in a wide variety of structural styles.
Specimen is about 4 5 x 3 5 x 3 5 centimeters.
