What is the difference between stratiform and stratabound?

What is the difference between stratiform and stratabound?

The terms stratum, bed and layer require precise definition. The terms stratiform orebody and stratabound orebody are defined and it is suggested that stratiform orebodies are a particular form of stratabound orebodies. (b) Those orebodies in which the ore has the form of a layer, i.e., of a stratum.

How are stratiform deposits formed?

Sedimentary rock-hosted stratiform copper deposits form by movement of oxidized, copper-bearing fluids across a reduction front that results in the precipitation of copper sulfides.

What does stratabound mean?

Said of a mineral deposit confined to a single stratigraphic unit. The term can refer to a stratiform deposit, to variously oriented orebodies contained within the unit, or to a deposit containing veinlets and alteration zones that may or may not be strictly conformable with bedding. Ref: AGI.

What is stratiform geology?

In mineral deposit: Stratiform deposits. A final class of hydrothermal deposit is called stratiform because the ore minerals are always confined within specific strata and are distributed in a manner that resembles particles in a sedimentary rock.

What is stratiform precipitation?

Stratiform clouds cover large areas but show relatively little vertical development. Stratiform precipitation, in general, is relatively continuous and uniform in intensity (i.e., steady rain versus rain showers).

What are stratiform chromite deposits?

Stratiform deposits are formed as large sheet-like bodies, usually formed in layered mafic to ultramafic igneous complexes. This type of deposit is used to obtain 98% of the worldwide chromite reserves. Stratiform deposits are typically seen to be of Precambrian in age and are found in cratons.

What is supergene enrichment?

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 sedimentary ore deposits?

Sedimentary processes form ore either through the selective removal of nonmetallic components or by concentration of metallic minerals. Rock at the earth’s surface is subjected to weathering and leaching, the process that turns rock into soil.

How do stratiform and convective precipitation differ?

Precipitation is of two clearly distinguishable types—stratiform and convective. Stratiform precipitation falls from nimbostratus clouds, while convective precipitation falls from active cumulus and cumulonimbus clouds. These cloud types may occur separately or entangled with each other in the same cloud complex.

What causes stratiform precipitation?

Stratiform precipitation occurs when large air masses rise diagonally as larger-scale atmospheric dynamics force them to move over each other. Orographic precipitation is similar, except the upwards motion is forced when a moving air mass encounters the rising slope of a landform such as a mountain ridge.

What is chromite used for?

Chromite is used as a refractory in the production of steel, copper, glass and cement. Chromite occurs as a primary accessory mineral in basic and ultrabasic igneous rocks.

What is chromite mining?

Chromite today is mined particularly to make stainless steel through the production of ferrochrome (FeCr), which is an iron-chromium alloy. Chromite grains are commonly found in large mafic igneous intrusions such as the Bushveld in South Africa and India.

What are the characteristics of stratiform deposits?

Stratiform Deposits. In stratiform deposits, there is a predominance of stratified bodies that are conformable with the enclosing rocks. The ores in these bodies have simple mineral compositions determined by the dissemination of copper, zinc, and lead sulfides and the accompanying minerals in one or more strata of the ore-bearing rocks.

Why do stratiform clouds form in the Arctic?

Upper level stratiform cloud layers probably result from horizontal advection of moist air undergoing weak ascent. The most unique aspect of summertime Arctic stratus clouds is that they occur with a large solar zenith angle (∼74°), and at 80°N the sun remains above the horizon for 24 h day −1 from May through August.

What is another name for a composite volcano?

Also found in: Encyclopedia, Wikipedia. A volcano composed of steep, alternating layers of lava and pyroclastic material, such as ash. Also called composite volcano. [ strat (um) + volcano .]

What type of volcano is composed of steep layers of lava?

A volcano composed of steep, alternating layers of lava and pyroclastic material, such as ash. Also called composite volcano. [ strat (um) + volcano .]