Original paper

High temperature mineralization in the bituminous limestone in Maqarin area — north Jordan

Khoury, Hani N.; Nassir, Sobhi

Neues Jahrbuch für Mineralogie - Abhandlungen Band 144 Heft 2 (1982), p. 197 - 213

10 references

published: Aug 1, 1982

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ArtNo. ESP154014402003, Price: 29.00 €

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Abstract

High temperature minerals are found with the bituminous limestone beds, outcropping on the southern bank of Yarmouk river, Maqarin area, north Jordan. The mineral assemblage includes among others: graphite, portlandite, lepidocrocite, bassanite, barite, thaumasite, wollastonite, tobermorite and anorthite. Spontaneous combustion of organic matter in the bituminous limestone was probably responsible for the high temperature mineralization. In the presence of quartz, prograde metamorphic minerals as wollastonite, spurrite and anorthite were formed. In the absence of quartz, calcination of the limestone took place, and highly alkaline waters rich in dissolved cations and anions were responsible for the formation of retrograde metamorphic minerals such as portlandite, ettringite, thaumasite, and barite. The resulting high temperature leads to the recrystallization of calcite and apatite. The assessment of these minerals, some of which are soluble, is of great significance to the intended construction of a dam in the Maqarin area.

Keywords

Mineral assemblagehigh temperaturebituminous limestoneprograde metamorphismretrograde metamorphism; Jordan (Maqarin area)