scholarly journals In situ produced cosmogenic krypton in zircon and its potential for Earth surface applications

2021 ◽  
Author(s):  
Tibor J. Dunai ◽  
Steven A. Binnie ◽  
Axel Gerdes
Keyword(s):  
Half Life ◽  
Radioactive Isotope ◽  
Cosmogenic Nuclides ◽  
Surface Processes ◽  
Time Range ◽  
Earth Surface ◽  
The Earth ◽  
Novel Applications ◽  
Proof Of Principle

Abstract. Analysis of cosmogenic nuclides produced in surface rocks and sediments is a valuable tool for assessing rates of processes and the timing of events that shaped the Earth surface. The various nuclides that are used have specific advantages and limitations that depend on the time-range over which they are useful, the type of material they are produced in, and not least the feasibility of the analytical effort. Anticipating novel applications in Earth surface sciences, we develop in-situ produced terrestrial cosmogenic krypton (Krit) as a new tool; the motivation being the availability of six stable and one radioactive isotope (81Kr, half-life 229 kyr) and of an extremely weathering-resistant target mineral (zircon). We provide proof of principle that terrestrial Krit can be quantified and used to unravel Earth surface processes.

scholarly journals In-Situ Cosmogenic 14C: Production and Examples of its Unique Applications in Studies of Terrestrial and Extraterrestrial Processes

Radiocarbon ◽  
2001 ◽  
Vol 43 (2B) ◽  
pp. 731-742 ◽  
Author(s):  
D Lal ◽  
A J T Jull
Keyword(s):  
Half Life ◽  
Earth Science ◽  
Chemical Properties ◽  
Radioactive Isotopes ◽  
Earth’S Atmosphere ◽  
The Earth ◽  
Wide Range ◽  
History Of ◽  
Earth's Atmosphere

Nuclear interactions of cosmic rays produce a number of stable and radioactive isotopes on the earth (Lai and Peters 1967). Two of these, 14C and 10Be, find applications as tracers in a wide variety of earth science problems by virtue of their special combination of attributes: 1) their source functions, 2) their half-lives, and 3) their chemical properties. The radioisotope, 14C (half-life = 5730 yr) produced in the earth's atmosphere was the first to be discovered (Anderson et al. 1947; Libby 1952). The next longer-lived isotope, also produced in the earth's atmosphere, 10Be (half-life = 1.5 myr) was discovered independently by two groups within a decade (Arnold 1956; Goel et al. 1957; Lal 1991a). Both the isotopes are produced efficiently in the earth's atmosphere, and also in solids on the earth's surface. Independently and jointly they serve as useful tracers for characterizing the evolutionary history of a wide range of materials and artifacts. Here, we specifically focus on the production of 14C in terrestrial solids, designated as in-situ-produced 14C (to differentiate it from atmospheric 14C, initially produced in the atmosphere). We also illustrate the application to several earth science problems. This is a relatively new area of investigations, using 14C as a tracer, which was made possible by the development of accelerator mass spectrometry (AMS). The availability of the in-situ 14C variety has enormously enhanced the overall scope of 14C as a tracer (singly or together with in-situ-produced 10Be), which eminently qualifies it as a unique tracer for studying earth sciences.

4. Rates and Timing of Earth Surface Processes From In Situ-Produced Cosmogenic Be-10

Beryllium ◽  
2002 ◽  
pp. 147-206 ◽  
Author(s):  
Paul R. Bierman ◽  
Marc W. Caffee ◽  
P. Thompson Davis ◽  
Kim Marsella ◽  
Milan Pavich ◽  
...  
Keyword(s):  
Surface Processes ◽  
Earth Surface

scholarly journals Revealing Histories of Exposure Using In Situ Produced 26Al and 10Be in Libyan Desert Glass

Radiocarbon ◽  
1986 ◽  
Vol 28 (2A) ◽  
pp. 547-555 ◽  
Author(s):  
Jeffrey Klein ◽  
Robert Giegengack ◽  
Roy Middleton ◽  
Pankaj Sharma ◽  
J R Underwood ◽  
...  
Keyword(s):  
Cosmic Rays ◽  
Sea Level ◽  
Surface Processes ◽  
Earth Surface ◽  
Production Rates ◽  
The Past ◽  
Libyan Desert ◽  
Libyan Desert Glass

We present the results of measurements of 26Al and 10Be produced in situ in 12 samples of Libyan Desert Glass by cosmic rays during the last ten million years. Based on the variability of the concentrations of 10Be and of the 26Al/10Be ratios we measured, we conclude that individual fragments of glass have experienced different exposure histories, implying several major redistributions of the glass within the past 106 years. The 26Al and 10Be concentrations are inconsistent with the theoretical estimates of the rates of in situ production. We estimate minimum production rates of 70 atoms g-1 yr-1 and 10 atoms g-1 yr-1 for 26Al and 10Be, respectively, produced in quartz at sea level between 60–90° latitude. Despite the present uncertainty in the rates of production, we feel that these results show clearly the effectiveness of in situ produced 26Al and 10Be in studying earth-surface processes.

scholarly journals Terrestrial Cosmogenic Nuclides as a tool for studying earth surface processes

2005 ◽  
Vol 111 (11) ◽  
pp. 693-700 ◽  
Author(s):  
Yusuke Yokoyama ◽  
Takahiro Aze ◽  
Hikaru Murasawa ◽  
Hiroyuki Matsuzaki
Keyword(s):  
Cosmogenic Nuclides ◽  
Surface Processes ◽  
Earth Surface

scholarly journals Satellite and In Situ Observations for Advancing Global Earth Surface Modelling: A Review

2018 ◽  
Vol 10 (12) ◽  
pp. 2038 ◽  
Author(s):  
Gianpaolo Balsamo ◽  
Anna Agusti-Panareda ◽  
Clement Albergel ◽  
Gabriele Arduini ◽  
Anton Beljaars ◽  
...  
Keyword(s):  
Remote Sensing ◽  
High Resolution ◽  
Remote Sensing Data ◽  
Data Availability ◽  
Spatial And Temporal Variability ◽  
Earth Surface ◽  
Surface Modelling ◽  
The Earth ◽  
In Situ Observations

In this paper, we review the use of satellite-based remote sensing in combination with in situ data to inform Earth surface modelling. This involves verification and optimization methods that can handle both random and systematic errors and result in effective model improvement for both surface monitoring and prediction applications. The reasons for diverse remote sensing data and products include (i) their complementary areal and temporal coverage, (ii) their diverse and covariant information content, and (iii) their ability to complement in situ observations, which are often sparse and only locally representative. To improve our understanding of the complex behavior of the Earth system at the surface and sub-surface, we need large volumes of data from high-resolution modelling and remote sensing, since the Earth surface exhibits a high degree of heterogeneity and discontinuities in space and time. The spatial and temporal variability of the biosphere, hydrosphere, cryosphere and anthroposphere calls for an increased use of Earth observation (EO) data attaining volumes previously considered prohibitive. We review data availability and discuss recent examples where satellite remote sensing is used to infer observable surface quantities directly or indirectly, with particular emphasis on key parameters necessary for weather and climate prediction. Coordinated high-resolution remote-sensing and modelling/assimilation capabilities for the Earth surface are required to support an international application-focused effort.

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