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What are the geologic structures of metallic minerals in the Philippines?
Most of the country’s metallic minerals, including gold, iron ore, lead, zinc, chromite, and copper, are drawn from major deposits on the islands of Luzon and Mindanao. Smaller deposits of silver, nickel, mercury, molybdenum, cadmium, and manganese occur in several other locations.
Where is chromite found in the Philippines?
Zambales
The Zambales ophiolite is the major source of chromite ore in the Philippines.
What structures can be found near the location of metallic deposit?
Answers. The structures that can be found near the location of metallic deposit are volcanoes and trenches. Gold, copper, iron, chromite, cobalt and other metals are seen near the volcanoes since they are a result of the change in temperature and state of the lava inside the volcanoes that were not released during the eruption.
How are metallic ores formed in intrusive rocks?
The development of metallic ores in intrusive rocks, such as porphyry copper deposits, is related to the partial melting and rising of crustal material along subduction zones. Metal in these systems may also be contributed from sea‐floor deposits that were subducted and became part of the new magma.
What minerals are found in a typical metal deposit?
A typical metal deposit might contain a few percent of ore minerals (e.g., chalcopyrite or sphalerite), mixed with the minerals of the original rock (e.g., quartz or feldspar). Other sulphide minerals are commonly present within the ore, especially pyrite. When ore is processed (typically very close to the mine),…
What type of plate tectonic plate boundary causes metallic ore deposits?
Most metallic ore deposits are a result of plate tectonic activity. High heat flows and convection currents at divergent plate boundaries, such as midoceanic ridges, create submarine hot springs called black smokers that deposit solid masses of metallic minerals.