Elk Creek, Nebraska, carbonatite: Strontium geochemistry

Brookins, Douglas G.; Treves, Samuel B.; Bolivar, S.L.

doi:10.1016/0012-821x(75)90076-x

Cited by 8 publications

(3 citation statements)

References 2 publications

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“…The Eimer and Amend SrC0 3 isotope standard was analysed eight times and has an 87Sr/8 6S r ratio of 0'70805 ±O·00020 (I (7). This value is in excellent agreement with results published by other investigators (Brookins et al 1975;Burwell 1975). The concentrations of quartz, feldspar, illite, and kaolinite-chlorite were estimated from X-ray diffraction patterns (Cu K-alpha X-radiation, Diano Corp., Model XRD-6) based on calibrations described by Boger & Faure (1976).…”

Section: Methodssupporting

confidence: 87%

Sources and abundance of volcanogenic sediment in piston cores from the Ross Sea, Antarctica

Kovach

Faure

1977

New Zealand Journal of Geology and Geophysics

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The 87Srj86Sr ratios and Sr concentrations of detrital silicate fractions of sediment of late Pliocene to Holocene age in the Ross Sea are controlled by the presence of varying proportions of volcanogenic detritus. A quantitative interpretation of the data in terms of a two-component mixing model leads to the conclusion that Mesozoic and Cenozoic volcanics of West Antarctica were the principal source of volcanogenic detritus in sediments of late Pliocene age. A thin and discontinuous layer of Holocene sediment contains much lower concentrations of volcanic detritus of basaltic composition.

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Section: Methodssupporting

confidence: 87%

Sources and abundance of volcanogenic sediment in piston cores from the Ross Sea, Antarctica

Kovach

Faure

1977

New Zealand Journal of Geology and Geophysics

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“…However, there are many gravity and magnetic anomalies along the system that could easily be related to such units, and some drill holes have penetrated mafic and alkaline bodies in the subsurface of Iowa and Nebraska near the MGA. These could be approximately the same age as the rift system (Yaghubpur 1979, Brookins et al 1975.…”

Section: Litholo~tic Suitesmentioning

confidence: 98%

“…One possibility, in fact, is the Elk Creek carbonatite-bearing complex associated with the Elk Creek anomaly in southeast Nebraska (Irons 1979). It is reported to underlie basal Paleozoic sedimentary rocks (Brookins et al 1975), and a nearby gabbro plug in the subsurface yields an At-At age of about 1200 Myr (Treves 1981).…”

Section: Economic Depositsmentioning

confidence: 99%