Stability of IRSL signals from sedimentary K-feldspar samples
نویسندگان
چکیده
منابع مشابه
Microfluidic Leaching of Soil Minerals: Release of K+ from K Feldspar
The rate of K+ leaching from soil minerals such as K-feldspar is believed to be too slow to provide agronomic benefit. Currently, theories and methods available to interpret kinetics of mineral processes in soil fail to consider its microfluidic nature. In this study, we measure the leaching rate of K+ ions from a K-feldspar-bearing rock (syenite) in a microfluidic environment, and demonstrate ...
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Almost all alkali feldspar crystals contain a rich inventory of exsolution, twin, and domain microtextures that form subsequent to crystal growth and provide a record of the thermal history of the crystal and often of its involvement in replacement reactions, sometimes multiple. Microtextures strongly influence the subsequent behavior of feldspars at low temperatures during diagenesis and weath...
متن کاملApplication of pulsed OSL to polymineral fine-grained samples
Pulsed OSL is applied to nine fine-grained sediment samples from Sichuan province, China, using stimulating pulses of 10 ms on and 240 ms off, with an infrared exposure prior to each OSL measurement. Comparison of fading rates between pulsed and non-pulsed signals, the latter also obtained with a preceding IR exposure, shows that fading is significant for mainly the non-pulsed signals. Presence...
متن کاملIsochron dating of sediments using luminescence of K-feldspar grains
[1] A new method for dating well-bleached sediments is presented, with results for thirteen samples from China. The method uses an isochron constructed from the measurement of natural radiation doses received by potassium-feldspar grains in a range of grain sizes using the infrared stimulated luminescence (IRSL) signal. The age of deposition of the sediment is calculated from this isochron and ...
متن کاملAn experimental study of bacterially induced dissolution of K-feldspar
It is often assumed that physical and chemical processes determine the geochemical budgets of base cations on the earth's surface. Little or no consideration has been given to microbial processes despite the abundance of micro-organisms in surface and sub-surface environments (e.g. 106-109 bacteria cells/cm 3 in soils) combined with their ability to excrete a wide range of organic acids and che...
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ژورنال
عنوان ژورنال: Geochronometria
سال: 2011
ISSN: 1897-1695
DOI: 10.2478/s13386-011-0003-z