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- W1991414907 abstract "Abstract The Mwananyamala geothermal field extends over an area of 4 km x 11 km in a region of faulted Permo—Triassic sandstones. The sandstones consist of deltaic arkoses, and fluvio-lacustrine shales, siltstones and sandstones. Alkaline intrusives of Upper Cretaeous age outcrop 3–10 km from the hot springs. Monchiquite dykes are associated with two of the four hot springs in the area. The hot springs discharge slightly alkaline NaC1-NaHC0 3 waters. Maximum surface discharge temperatures are 56–76°C. Calculated reservoir temperatures are 172–180°C. Maximum heavy metal concentrations in the discharge waters are 1.3 ppm Pb, 0.2 ppm Zn, 0.2 ppm Cu and 2.2 ppm Fe. Massive pyrite is currently being deposited at or near the surface at three of the hot springs. The pyrite contains up to 2% Ag, 0.9% La, 30 ppm Pb, 5 ppm Zn and 4 ppm Cu. At one of the hot spring localities, malachite is ubiquitous. The malachite-bearing rocks contain, on average, 2.4% Cu and 2.2% Pb." @default.
- W1991414907 created "2016-06-24" @default.
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- W1991414907 date "1990-01-01" @default.
- W1991414907 modified "2023-09-27" @default.
- W1991414907 title "Present day ore deposition in the geothermal systems of kenya—i. the mwananyamala hot springs, northeast of jombo hill, coast province" @default.
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- W1991414907 doi "https://doi.org/10.1016/0375-6505(90)90019-8" @default.
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