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Silicon isotopes; from cosmos to benthos

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Authors:Chakrabarti, Ramananda
Author Affiliations:Primary:
Indian Institute of Science, Centre for Earth Sciences, Bengaluru, India
Volume Title:Current Science (Bangalore)
Source:Current Science (Bangalore), 108(2). Publisher: Current Science Association, Bangalore, India. ISSN: 0011-3891
Publication Date:2015
Note:In English. 112 refs.; illus.
Summary:Silicon is the second most abundant element on the Earth and one of the more abundant elements in our Solar System. Variations in the relative abundance of the stable isotopes of Si (Si isotope fractionation) in different natural reservoirs, both terrestrial (surface and deep Earth) as well as extra-terrestrial (e.g. meteorites, lunar samples), are a powerful tracer of present and past processes involving abiotic as well as biotic systems. The versatility of the Si isotope tracer is reflected in its wide-ranging applications from understanding the origin of early Solar System objects, planetary differentiation, Moon formation, mantle melting and magma differentiation on the Earth, ancient sea-water composition, to modern-day weathering, clay formation and biological fractionation on land as well as in the oceans. The application of Si isotopes as tracers of natural processes started over six decades ago and its usage has seen a sudden increase over the last decade due to improvements in mass spectrometry, particularly the advent of multicollector inductively coupled plasma mass spectrometers, which has made Si isotope measurements safe and relatively easy while simultaneously improving the accuracy and precision of measurements.
Subjects:Benthic taxa; Chondrites; Cosmogenic elements; Earth; ICP mass spectra; Interplanetary comparison; Isotope fractionation; Isotope ratios; Isotopes; Lunar samples; Mantle; Mass spectra; Meteorites; Moon; Sea water; Si-29/Si-28; Si-30; Silicates; Silicon; Solar system; Spectra; Stable isotopes; Stony meteorites; Weathering
Record ID:848915-7
Copyright Information:GeoRef, Copyright 2020 American Geosciences Institute.
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