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The AAPG/Datapages Combined Publications Database

West Texas Geological Society

Abstract


West Texas Geological Society Bulletin
Vol. 29 (1989), No. 3. (November), Pages 5-11

Brushite: Occurrence of an Unusual Phosphate Mineral in Castile Evaporites

Khyal Mohammed, Mahbub Hussain

Abstract

Brushite, an uncommon calcium phosphate mineral, occurs as drusy or cavity-filling cement in the Castile evaporites in the ‘classic’ outcrops, along US Highway 62/180 in Eddy county, New Mexico, and in outcrops along State Highway 652, Culberson County, west Texas. Compared to its distribution in the lower and middle horizons, the mineral is much more abundant in the upper horizons, especially in sections where rocks are generally friable and porous. It is here suggested that this brushite has formed by a combination of leaching and reprecipitation processes, largely controlled by the postdepositional paleohydrology of the depositional basin. ’


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