Browsing ELibrary by Subject "40AR/39AR GEOCHRONOLOGY"
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Browsing ELibrary by Subject "40AR/39AR GEOCHRONOLOGY"
Now showing items 1-7 of 7
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(2006)The Beishan Mountain is located in north-western China and eastern-central part of the Central Asian Orogenic Belt. The granitoid intrusions are well developed and associated with copper, tungsten, gold and molybdenum ...
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(2000)Alteration of submarine basalts compromises geochronology using conventional K/Ar and 40Ar/39Ar techniques. To help overcome these problems, we re-evaluated the potential of groundmass dating techniques. Incremental heating ...
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(2000)Calculation of an 40Ar/39Ar age involves several sources of systematic (external) and statistic (mostly instrumental) errors that should be propagated into the final result for a proper statistical assessment of the age ...
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(2006)The Tiribí Tuff covered much of the Valle Central of Costa Rica, currently the most densely populated area in the country (~2.4 million inhabitants). Underlying the tuff, there is a related well-sorted pumice deposit, the ...
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(2004)A method is presented for the analysis and interpretation of apparent age spectra produced during 40Ar/39Ar step-heating experiments. Application of this method is particularly relevant to complex apparent age spectra ...
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(2006)We have determined high-precision 40Ar/39Ar ages for alkaline igneous rocks from the western margin of the Early-Cretaceous Paraná-Etendeka large igneous province (Paraguay). These show that small-fraction melt generation ...
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(2005)При уточнении геологических соотношений магматитов в условиях недостаточной обнаженности, к которым относятся Колывань-Томская складчатая зона и Кузнецкий бассейн, особое значение приобретают петрогеохимические и ...
Now showing items 1-7 of 7