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Gypsum and Anhydrite Deposits in Southwestern Indiana

This report discusses the production and uses of gypsum and the types of gypsum and anhydrite deposits, their physical and chemical properties, geologic association, and theories of origin. Subsurface studies in southwestern Indiana have revealed rather extensive gypsum deposits in the lower part of the St. Louis limestone.

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Anhydrite - Wikipedia

Anhydrite is most frequently found in evaporite deposits with gypsum; it was, for instance, first discovered in 1794 in a salt mine near Hall in Tirol. In this occurrence, depth is critical since nearer the surface anhydrite has been altered to gypsum by absorption of circulating ground water. From an aqueous solution, calcium sulfate is deposited as crystals of gypsum, but when the solution contains an excess of sodium or potassium chloride, anhydrite is deposited if the temper

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Gypsum Anhydrite: Mineral information, data and localities.

1.02% of all Limestone deposits have Gypsum Anhydrite. 2.50% of all Gypsum Anhydrite deposits have Limestone. Copper: 11: 10,730: 0.10% of all Copper deposits have Gypsum Anhydrite. 1.53% of all Gypsum Anhydrite deposits have Copper. Iron: 10: 7,007: 0.14% of all Iron deposits have Gypsum Anhydrite. 1.39% of all Gypsum Anhydrite ...

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Difference Between Gypsum and Anhydrite Difference Between

Nov 20, 2009  Gypsum vs Anhydrite Gypsum, also called hydrated calcium sulphate (CaSO4 Â 2H2O) and anhydrite (CaSO4), also called hydrous calcium sulphate are the major minerals in the sedimentary rocks of rock gypsum and rock anhydrite respectively. Gypsum consists of calcium, sulfur and water while anhydrite consists of calcium, sulfur and oxygen. The rocks

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Anhydrite and Gypsum - Indiana Geological and Water Survey

Gypsum (CaSO 4.2H 2O) and anhydrite (CaSO 4) are two related minerals that formed in Indiana during periodic episodes of ancient sea water evaporation in restricted basins. Large deposits of both minerals are located in northwestern and southwestern

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Gypsum Anhydrite: Mineral information, data and localities.

1.02% of all Limestone deposits have Gypsum Anhydrite. 2.50% of all Gypsum Anhydrite deposits have Limestone. Copper: 11: 10,730: 0.10% of all Copper deposits have Gypsum Anhydrite. 1.53% of all Gypsum Anhydrite deposits have Copper. Iron: 10: 7,007: 0.14% of all Iron deposits have Gypsum Anhydrite. 1.39% of all Gypsum Anhydrite ...

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Gypsum and anhydrite deposits in southwestern Indiana ...

This report discusses the production and uses of gypsum and the types of gypsum and anhydrite deposits, their physical and chemical properties, geologic association, and theories of origin. Subsurface studies in southwestern Indiana have revealed rather extensive gypsum deposits in the lower part of the St. Louis limestone. Stratigraphic analysis of this evaporite unit indicates that gypsum ...

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THE STABILITY OF GYPSUM AND ANHYDRITE

in the study of gypsum and anhydrite beds, for if estimates of the depth of burial, temperature, and concentration of ground water solutions can be made for these deposits then the stable calcium sulphate phase can be determined. Finally, in an attempt to find some means of cor-relating gypsum and anhydrite zones, a number of differential

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Anhydrite Mineral Physical - Optical Properties ...

Anhydrite may form on the coastline or tidal flat deposits caused by the evaporation of seawater. Occurrence of Anhydrite Calcium sulphate from an aqueous solution is deposited as crystals of gypsum, but when the solution contains an excess of sodium or potassium chloride, the anhydride is deposited when the temperature is above 40 ° C (104 ° F).

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University of Minnesota’s Mineral Pages: Gypsum

When gypsum is heated, water is driven from its crystal structure to produce anhydrite. Anhydrite is commonly known as Plaster of Paris, because thick deposits of gypsum occur in the Paris Basin. When Plaster of Paris is mixed with water, it forms a paste that can be easily shaped and that hardens into solid gypsum.

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PHYSICAL PROPERTIES OF SALT ANHYDRITE, AND GYPSUM ...

OFFICIAL USE OBLI PHYSICAL PROPERTIES OF SALT, AMHYDRITE, MD GYPSUM ^y-Eugene. C. Robertson, Richard A, Robie, " and Kenneth G. Books ABSTRACT This summary is the yesult of a search of the available literattire.

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KGS--Geological Log Analysis--Evaporites

The gypsum beds of the Blaine Formation are obvious on the example log section, and can be distinguished immediately from anhydrite, which has a neutron porosity of -2 p.u. and a heavy density of 2.98. ( An anhydrite bed is located at a depth of 1055 feet.)

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GYPSUM DEPOSITS IN THE FRASASSI CAVES, CENTRAL ITALY

upon reaching the cave, or anhydrite (gypsum) is dissolved along the flow path and carried to the cave wall, where evapo-ration causes precipitation of gypsum. Large-size (up to m-scale) gypsum deposits are less common in carbonate caves, and are generally considered the result of H2S-rich water cir-culation inside the cave.

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Anhydrite in Porphyry Copper systems...just how good is it?

I like the paper by Henley et al (2015), but I wonder whether it can fully account for the very large volumes of gypsum/anhydrite in such deposits. DSC_0017_Toquepala Pyrite with Anhydrite- Gypsum

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Gypsum Physical-Optical Properties, Uses, Occurrence More

Deposits are recognized to occur in strata from as a long way lower back as the Archaean eon. It is deposited from lake and sea water, as well as in hot springs, from volcanic vapors, and sulfate answers in veins. Hydrothermal anhydrite in veins is commonly hydrated to gypsum by means of groundwater in near-floor exposures.

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Anhydrite: The mineral anhydrite information and pictures

Anhydrite is not a common mineral, as it easily alters to the much more common mineral Gypsum from the addition of water into its chemical structure.Anhydrite and Gypsum are chemically similar, except Gypsum has the addition of water. In fact, the name of Anhydrite is derived from "An" and "Hydra" - meaning "without water" - in reference to its similarity to Gypsum

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Gypsum - Wikipedia

Gypsum is a soft sulfate mineral composed of calcium sulfate dihydrate, with the chemical formula CaSO 4 2H 2 O. It is widely mined and is used as a fertilizer and as the main constituent in many forms of plaster, blackboard/sidewalk chalk, and drywall.A massive fine-grained white or lightly tinted variety of gypsum, called alabaster, has been used for sculpture by many

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Global Gypsum and Anhydrite Industry

Jul 14, 2020  Global Gypsum and Anhydrite Market to Reach 382. 1 Million Metric Tons by the Year 2027. Amid the COVID-19 crisis, the global market for Gypsum and Anhydrite estimated at 306. 6 Million Metric ...

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The deposition of gypsum and anhydrite Economic Geology ...

The evaporites, gypsum and anhydrite, present a problem. Some deposits are predominantly gypsum, in some anhydrite is the chief constituent, but others are both gypsum and anhydrite. This paper considers some of the controlling physical and chemical conditions in a lagoon and how they point towards a solution of the problems.

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Gypsum Anhydrite: Mineral information, data and localities.

1.02% of all Limestone deposits have Gypsum Anhydrite. 2.50% of all Gypsum Anhydrite deposits have Limestone. Copper: 11: 10,730: 0.10% of all Copper deposits have Gypsum Anhydrite. 1.53% of all Gypsum Anhydrite deposits have Copper. Iron: 10: 7,007: 0.14% of all Iron deposits have Gypsum Anhydrite. 1.39% of all Gypsum Anhydrite ...

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Gypsum and anhydrite deposits in southwestern Indiana ...

This report discusses the production and uses of gypsum and the types of gypsum and anhydrite deposits, their physical and chemical properties, geologic association, and theories of origin. Subsurface studies in southwestern Indiana have revealed rather extensive gypsum deposits in the lower part of the St. Louis limestone. Stratigraphic analysis of this evaporite unit indicates that gypsum ...

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University of Minnesota’s Mineral Pages: Gypsum

When gypsum is heated, water is driven from its crystal structure to produce anhydrite. Anhydrite is commonly known as Plaster of Paris, because thick deposits of gypsum occur in the Paris Basin. When Plaster of Paris is mixed with water, it forms a paste that can be easily shaped and that hardens into solid gypsum.

Read More
Gypsum Physical-Optical Properties, Uses, Occurrence More

Deposits are recognized to occur in strata from as a long way lower back as the Archaean eon. It is deposited from lake and sea water, as well as in hot springs, from volcanic vapors, and sulfate answers in veins. Hydrothermal anhydrite in veins is commonly hydrated to gypsum by means of groundwater in near-floor exposures.

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Gypsum Mineral Uses and Properties

Gypsum is an evaporite mineral most commonly found in layered sedimentary deposits in association with halite, anhydrite, sulfur, calcite, and dolomite. Gypsum (CaSO 4. 2H 2 O) is very similar to Anhydrite (CaSO 4). The chemical difference is that gypsum contains two waters and anhydrite is without water. Gypsum is the most common sulfate mineral.

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KGS--Gypsum in Kansas--Geology

Newland (1921, p. 141) stated that some economically important gypsum deposits in New York were originally anhydrite. He considers gypsum to be unstable under conditions of permanent load, whereas anhydrite is stable. Evidence for this is the fact that gypsum grades into anhydrite down dip.

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PHYSICAL PROPERTIES OF SALT ANHYDRITE, AND GYPSUM ...

OFFICIAL USE OBLI PHYSICAL PROPERTIES OF SALT, AMHYDRITE, MD GYPSUM ^y-Eugene. C. Robertson, Richard A, Robie, " and Kenneth G. Books ABSTRACT This summary is the yesult of a search of the available literattire.

Read More
KGS--Geological Log Analysis--Evaporites

The gypsum beds of the Blaine Formation are obvious on the example log section, and can be distinguished immediately from anhydrite, which has a neutron porosity of -2 p.u. and a heavy density of 2.98. ( An anhydrite bed is located at a depth of 1055 feet.)

Read More
GYPSUM DEPOSITS IN THE FRASASSI CAVES, CENTRAL ITALY

upon reaching the cave, or anhydrite (gypsum) is dissolved along the flow path and carried to the cave wall, where evapo-ration causes precipitation of gypsum. Large-size (up to m-scale) gypsum deposits are less common in carbonate caves, and are generally considered the result of H2S-rich water cir-culation inside the cave.

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Origin and diagenesis of gypsum and anhydrite Journal of ...

A diagenetic cycle exists in the calcium sulfate minerals. Gypsum is deposited by precipitation or by growth of crystals in unconsolidated rocks near the surface. This primary gypsum is replaced, with burial, by anhydrite at a temperature of 42 degrees C and theoretical depth of 2,000 feet. Anhydrite (metagypsum) occurs as beds and pore-fillings.

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ORIGIN AND DIAGENESIS GYPSUM ANHYDRI'J'P

anhydrite as a resu_lt of burial and is in tum .replaced by gypsum if the anhydrite is thereafter brought dose tu the sutface. ORIGIN OF PRIMARY DEPOSITS surface, the replacement of anhydrite by gypsum Sedimentary deposits of the calcium sulfate has been observed as deep as 3500 feet in the minerals (gypsum and anhydrite) are common Permian San ...

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Anhydrite - Mindat.org - Mines, Minerals and More

6.4 x 3.7 x 1.6 cm. Anhydrite (anhydrous calcium sulfate, CaSO4) is a very close cousin of gypsum - which is hydrous - CaSO4-2H20. Gypsum or "selenite" is of course the more famous of these cousins from Naica, but the locality has also produced very pretty anhydrite specimens, such as this "Chrysler Building" style specimen of pretty dove-grey. ...

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Anhydrite mineral Britannica

Anhydrite, an important rock-forming mineral, anhydrous calcium sulfate (CaSO 4).It differs chemically from gypsum (to which it alters in humid conditions) by having no water of crystallization. Anhydrite occurs most often with salt deposits in association with gypsum, as in the cap rock of the Texas-Louisiana salt domes. Anhydrite is one of the major minerals in evaporite deposits

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