• Gypsum and anhydrite deposits in southwestern

    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 (CaSO4 2H2O) and anhydrite (CaSO4) accumulated in small basins within larger basins (intrasilled basins)

  • The deposition of gypsum and anhydrite | Economic

    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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  • THE STABILITY OF GYPSUM AND ANHYDRITE

    explaining some of the gypsumanhydrite sequences found in geologic deposits The experiments were conducted using high pressure bombs which contained samples of pure gypsum or anhydrite in a saturated calcium sulphate solution By placing these bombs in electric furnaces and allowing sufficient time for equilibrium

  • Petrology of gypsumanhydrite deposits in

    Although primary gypsum could not be recognized as such, much of the calcium sulfate was probably originally precipitated as gypsum For gypsification to take place, space must be available for water in addition to space occupied by anhydride; this total volume (anhydride plus water) is greater than the amount of space occupied by the resultant gypsum

  • Cited by: 16
  • (PDF) Dissolution and conversions of gypsum and

    Conversion of gypsum to anhydrite and back to gypsum is common due to the thermodynamic instability of these minerals within the physicochemical range of common geologic environments The

  • ORIGIN AND DIAGENESIS GYPSUM ANHYDRI'J'P

    anhydrite as a result 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 Andt:es Formation, Dune field,

  • Anhydrite and Gypsum Indiana Geological and Water

    Gypsum (CaSO 42H 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 Indiana These deposits are commonly associated with dolostone and limestone

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  • Delineation of gypsum/anhydrite transition zone using

    of anhydrite to gypsum, ie the gypsification of anhydrite, is a frequent phenomenon (eg GarciaRuiz et al, 2007) The gypsum is dehydrated and transformed to anhydrite as a consequence of geological burial On the contrary, anhydrite can be hydrated to gypsum when it is in contact with fluids during exhumation

  • Mechanisms for anhydrite and gypsum formation in

    Larger crystals of type II anhydrite are partly replaced by smaller ones, indicating that anhydrite dissolution and recrystallization occurred after or during the formation of sekko ore Gypsum,

  • Gypsum and anhydrite deposits in southwestern

    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

  • The deposition of gypsum and anhydrite | Economic

    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

  • Anhydrite and gypsum | SpringerLink

    Anhydrite (CaSO 4) and gypsum (CaSO 4 ·2H 2 O) are the two most abundant minerals of ancient marine evaporite deposits and are also common in nonmarine evaporite deposits Sedimentary gypsum forms by direct precipitation out of evaporating seawater under arid climatic conditions in hydrologically restricted marine and marginal marine environments (eg, tidal flats, coastal lagoons

  • 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 correlating gypsum and anhydrite zones, a number of differential

  • Anhydrite and Gypsum Indiana Geological and Water

    Gypsum (CaSO 42H 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

  • Anhydrite an overview | ScienceDirect Topics

    Native sulfur is commonly found within anhydritegypsum deposits Outside of the common atmospheric gases, such naturallyoccurring pure elements are rare Anhydrite and gypsum are forms of calcium sulfate (ie, CaSO 4; when anhydrite comes in contact with water, it becomes gypsum), which is, itself, a sulfurcontaining mineral The most

  • Difference Between Gypsum and Anhydrite |

    Anhydrite is a hard crystal with a hardness rating of 35 and approximate density of 30 It is a rare mineral since much of its existing specimen alter to the much more gypsum when altered Anhydrite usually occurs in arid places forming from the dehydration of gypsum When exposed to water, anhydrite slowly turns into gypsum

  • Depositional setting of gypsum deposits,

    The implications of a gypsum exploration model, based on the modern evaporitic facies of northern Egypt, are that economic coastal salina/lagoon deposits of the Salina A and Banhydrite units should be restricted to the ancient shoreline of the Appalachian

  • Gypsum Occurrence, Properties, & Uses of Gypsum

    Gypsum Gypsum is an evaporite mineral most commonly found in layered sedimentary deposits in association with halite, anhydrite, sulfur, calcite, and dolomite Gypsum (CaSO42 H 2 O) is really similar to Anhydrite (CaSO4) The chemical difference is that gypsum includes two waters and anhydrite is without water Gypsum is the most common

  • Anhydrite Mineral | Uses and Properties

    What is Anhydrite? Anhydrite is an evaporite mineral that occurs in extensive layered deposits in sedimentary basins where large volumes of sea water have been evaporated It is typically interbedded with rocks that include halite, gypsum, and limestoneThese accumulations can be hundreds of feet thick On a smaller scale, anhydrite can form in shoreline or tidal flat sediments from the

  • The deposition of gypsum and anhydrite | Economic

    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

  • Anhydrite and gypsum | SpringerLink

    Anhydrite (CaSO 4) and gypsum (CaSO 4 ·2H 2 O) are the two most abundant minerals of ancient marine evaporite deposits and are also common in nonmarine evaporite deposits Sedimentary gypsum forms by direct precipitation out of evaporating seawater under arid climatic conditions in hydrologically restricted marine and marginal marine environments (eg, tidal flats, coastal lagoons

  • 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 correlating gypsum and anhydrite zones, a number of differential

  • GYPSUM, GROUP: GYPSUM, ANHYDRITE

    Deposits Accumulations of gypsum are linked with seashoal deposits, which are widely represented at all the continent of the world (See gypsum 2 – rock) Besides, it is formed in the weathering zones, in the process of metasomatism and at some hydrothermal deposits Large crystals of gypsum were found at many deposits through all the world

  • KGSGypsum in KansasGeology

    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

  • Gypsum Anhydrite Mines In The United States | The

    Gypsum Anhydrite Mines North America The United States; Gypsum Anhydrite Mines In The United States Total Prospects Occurrences Plants Producers Arizona 22 3 7 12 California 7 2 1 4 Colorado 4 3 1 Idaho 2 2 Michigan 3 3 Nevada 24 6 3 15 New Mexico 2 2 New York 1 1 Texas 2 2 Utah 9 3 2 4 Washington 3

  • KGSGypsum in Kansas

    Gypsum probably was formed by the hydration of this anhydrite by the action of ground water, although not enough is known about the gypsum deposits to eliminate the possibility that some of them may have been deposited directly as gypsum contemporaneously with the anhydrite Gypsum is mined at Blue s by the Certainteed Products Company

  • Depositional setting of gypsum deposits,

    The implications of a gypsum exploration model, based on the modern evaporitic facies of northern Egypt, are that economic coastal salina/lagoon deposits of the Salina A and Banhydrite units should be restricted to the ancient shoreline of the Appalachian

  • Anhydrite Mineral | Uses and Properties

    What is Anhydrite? Anhydrite is an evaporite mineral that occurs in extensive layered deposits in sedimentary basins where large volumes of sea water have been evaporated It is typically interbedded with rocks that include halite, gypsum, and limestoneThese accumulations can be hundreds of feet thick On a smaller scale, anhydrite can form in shoreline or tidal flat sediments from the

  • Gypsum USGS

    GYPSUM (Data in thousand metric tons unless otherwise noted) Domestic Production and Use: In 2020, domestic production of crude gypsum was estimated to be 22 million tons with a value of about $190 million The leading crude gypsumproducing States were estimated to be Iowa, Kansas, Nevada, Oklahoma, and Texas

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