Radioactive disequilibrium of thorium series nuclides in hot spring deposits.
نویسندگان
چکیده
منابع مشابه
Mapping Hot Spring Deposits with Aviris at Steamboat Springs, Nevada
1.0 INTRODUCTION Active and fossil hot springs systems occur worldwide, and share many common characteristics that indicate similar genetic histories (White 1955; Waring 1965; Rhinehart 1980; White 1981; Bowen 1989). This research studies the occurrence and characteristics of hot springs at Steamboat Springs, Nevada using Airborne Visible/Infrared Imaging Spectrometer (AVIRIS) data. Both highan...
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Efficient production of short-lived radioactive isotopes in inverse reaction kinematics is an important technique for various applications. It is particularly interesting when the isotope of interest is only a few nucleons away from a stable isotope. In this article production via charge exchange and stripping reactions in combination with a magnetic separator is explored. The relation between ...
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The residence time of atmospheric aerosol particles is a function of various removal processes, such as dry deposition by impaction, diffusion, sedimentation and resuspension as well as wet deposition by rain drops (precipitation scavenging). Estimation of the mean-residence time of atmospheric aerosols could be based on measurements of the activities and ratios of activities of cosmic-ray prod...
متن کاملEarliest signs of life on land preserved in ca. 3.5 Ga hot spring deposits
The ca. 3.48 Ga Dresser Formation, Pilbara Craton, Western Australia, is well known for hosting some of Earth's earliest convincing evidence of life (stromatolites, fractionated sulfur/carbon isotopes, microfossils) within a dynamic, low-eruptive volcanic caldera affected by voluminous hydrothermal fluid circulation. However, missing from the caldera model were surface manifestations of the vol...
متن کاملCorrigendum: Earliest signs of life on land preserved in ca. 3.5 Ga hot spring deposits
This corrects the article DOI: 10.1038/ncomms15263.
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ژورنال
عنوان ژورنال: GEOCHEMICAL JOURNAL
سال: 1975
ISSN: 0016-7002
DOI: 10.2343/geochemj.9.221