Instrumental neutron activation analysis of rocks with a low-energy photon detector

Hertogen, Jan; Gijbels, R.

doi:10.1016/s0003-2670(01)80110-0

Cited by 105 publications

(21 citation statements)

References 13 publications

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“…The irradiated samples were counted at various cooling times with a large coaxial Ge(Li) detector (Gordon et ah 1968) and/or a small planar low energy Ge(Li) photon detector (Hertogen and Gijbels 1971). For the INAA procedure, U.S. Geological Survey standard rocks BCR-i and PCC-i were used as standards.…”

Section: Methodsmentioning

confidence: 99%

Trace element indicators of the genesis of the Rhum layered intrusion, Inner Hebrides

Henderson

Gijbels²

1976

SJG

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SYNOPSISAlmost constant concentration of nickel in cumulus olivine crystals taken from the bases and tops of many of the macrorhythmic units of Rhum indicates that a large volume of magma, if predominantly liquid, was needed to produce each unit. Some units represent less than 2 per cent by mass of a liquid parent magma.Rare earth element concentrations in cumulus plagioclases indicate that the parent magma was enriched in the light relative to the heavy rare earths. The estimated rare earth abundance pattern of the parent magma suggests that the melt was produced from a small amount of partial melting of upper mantle material.

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Section: Methodsmentioning

confidence: 99%

Trace element indicators of the genesis of the Rhum layered intrusion, Inner Hebrides

Henderson

Gijbels²

1976

SJG

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“…In a pioneering paper, Gordon et al (1968) demonstrated the feasibility of rare earth element determination of geological samples using a large volume coaxial lithium-drifted germanium detector. In a complementary paper, Hertogen & Gijbels (1971) demonstrated that smaller volume 'planar' germanium detectors gave superior detection characteristics in the determination of REE from the lower gamma spectral range (eg. 60-200 keV).…”

Section: Instrumental Neutron Activation Analysismentioning

confidence: 99%

Advances in analytical technology and its influence on the development of modern inorganic geochemistry: a historical perspective

Potts

Hawkesworth

Calsteren

et al. 1993

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“…The method used was essentially that described by Leake et al (1969). For the INAA, a procedure analogous to that described by Gordon et al (1968), Hertogen and Gijbels (1971), Plant et al (1976), and Jacobs et al (1977) was used. The samples were irradiated in the Herald reactor at the Atomic Weapons Research Establishment, Aldermaston, at a thermal neutron flux of 2.5 x 1012-4.0x1012 n cm -2 s -1 for c. 18 h. The total integrated dose received by the samples was 1.0 x 1016 n cm -2.…”

Section: Sampliny and Analysis Of The Metabasic Rocksmentioning

confidence: 99%

Rare-earth element distribution in the metabasic rocks of the Land's End granite aureole, SW England

Mitropoulos¹

1984

Mineral. mag.

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ABSTRACT. Rock samples from the various metabasic hornfelses of the Land's End granite aureole were analysed for major elements by X-ray fluorescence analysis and for rare-earth elements (REE) by instrumental neutron activation analysis (INAA). The REE patterns of the unaltered dolerites of the area seem to be analogous to those of the alkali basalts, taking into account a slight mobilization of the light REE during low-grade metamorphism.The REE content of the metabasic rocks of the aureole has increased relative to that of the unaltered dolerites due to the introduction of REE, along with K, from the granite by the action of hydrothermal solutions. The parallel increase in REE with the increase in K is demonstrated.The metasomatic hornfelses of igneous origin form two groups showing slightly different REE patterns and different rates of increase in REE content. The REE patterns of the two groups show a Eu anomaly increasing with the increase in REE content for the first group and decreasing with the increase in REE content for the second group, A qualitative model of the distribution of the REE in the metabasic aureole rocks is given.T tie great variety of the metamorphic-metasomatic hornfelses which exist in the Land's End granite aureole, as well as the rich mineral veining of the area, have attracted the interest of a great number of geologists since the beginning of the last century. A detailed review of the previous research on the Land's End granite aureole is given in Mitropoulos (1979). The mineralogically, petrologically, and chemically different aureole rock types are regarded as derived by metamorphism, coupled with metasomatism, of basic igneous and sedimentary rocks resulting from the introduction of the granite.It has been shown (Mitropoulos, 1982) that the metasedimentary hornfelses of the Land's End granite aureole show similar REE patterns, highly enriched in light REE relative to the heavy REE. The REE content of the metasedimentary hornfelses of the aureole has increased relative to the REE content of the unaltered sediments of the area due Copyright the Mineralogical Societyto the introduction of REE from the granite by the action of hydrothermal solutions. It has also been shown that the REE patterns of the metasedimentary hornfelses of the Land's End granite aureole have a completely different shape to the patterns of both the metabasic rocks of the aureole and the granite.The present work is an attempt to trace possible genetic relationships between the different metabasic hornfelses occurring in the Land's End granite aureole using REE geochemistry. Geological settingThe Land's End peninsula, lying in the western part of Cornwall, is formed of a mass of granite surrounded by a narrow belt of metamorphosed and metasomatized basic igneous and sedimentary country rocks still exposed at various points along the coastline ( fig.

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Instrumental neutron activation analysis of rocks with a low-energy photon detector

Cited by 105 publications

References 13 publications

Trace element indicators of the genesis of the Rhum layered intrusion, Inner Hebrides

Trace element indicators of the genesis of the Rhum layered intrusion, Inner Hebrides

Advances in analytical technology and its influence on the development of modern inorganic geochemistry: a historical perspective

Rare-earth element distribution in the metabasic rocks of the Land's End granite aureole, SW England

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