What is hypogene ore?
Hypogene also often refers to primary, unaltered ore that formed directly from thermal aqueous solutions that derived from great depths (e.g., Ague and Brimhall 1989; Webb and Rowston 1995; Rakovan 2003).
What is supergene and hypogene?
Supergene is a term used to describe near-surface processes and their products, formed at low temperature and pressure by the activity of descending water and gas. The opposite term is hypogene, formed by ascending water and gas at high temperature and pressure.
What is supergene ore?
Supergene ores can be (a) formed in situ from rocks that are being actively weathered in the regolith, or (b) through mineral precipitation from meteoric groundwaters circulating above or at the level of the permanent water table.
What is sedimentary ore?
A chemical sedimentary ore is one in which the concentration of ore minerals accumulated as a result of precipitation from solutions at the Earth’s surface. All natural surface waters are multi-element solutions.
What is hypogene geology?
Hypogene is a term used only in the adjective form for any geological process genetically connected with deeper parts of the Earth’s crust or for mineral, rock and ore formed beneath the surface of the Earth. It is an opposite term to supergene.
What is supergene alteration?
supergene sulfide enrichment, also called Secondary Enrichment, in geology, natural upgrading of buried sulfide deposits by the secondary or subsequent deposition of metals that are dissolved as sulfates in waters percolating through the oxidized mineral zone near the surface.
What is hypogene deposit?
Hypogene ore deposits are formed under the influence of deep-seated endogene (=hypogene) geologic processes by the action of ascending solutions. Such solutions and conditions of ore formation are also called hypogene. The temperature and pressure are higher in hypogene than in supergene conditions.
What are sedimentary processes?
Definition: A phenomenon that changes the distribution or physical properties of sediment at or near the earth’s surface.
What is sedimentary mineral deposit?
mineral deposits formed during the accumulation of sediment on the bottom of rivers and other bodies of water. According to their place of formation they are divided into river, swamp, lake, sea, and ocean deposits.
What are hypogene processes in ore deposits?
In ore deposit geology, hypogene processes occur deep below the earth’s surface, and tend to form deposits of primary minerals, as opposed to supergene processes that occur at or near the surface, and tend to form secondary minerals. At great depth the pressure is high, and water can remain liquid at temperatures well above 100 °C.
What is a hypogene mineral?
Minerals formed in this way are called primary, or hypogene, minerals. Sulfur is a common component of the fluids, and most of the common ore metals, lead, zinc, copper, silver, molybdenum and mercury, occur chiefly as sulfide and sulfosalt minerals.
What is the paragenesis of hypogene ore minerals in VMS deposits?
The paragenesis of hypogene ore minerals in many ancient VMS deposits is further complicated by recrystallization and replacement during posthydrother- mal metamorphism (for example, bornite ores at Kidd Creek; Hannington and others, 1999b). Zoning Patterns
What do the terms hypogene and supergene refer to?
The terms hypogene and supergene refer to the depth at which they occur. ^ Rakovan, John (November–December 2003). “A Word to the Wise: Hypogene & Supergene” (PDF).