We present an approach to dating of carbonates using isotopic maps. The maps are divided into squares called virtual spots. For each virtual spot, statistical values (mean, uncertainty) are used to determine the age. The user can modify the size and location of the virtual spots and select those that give the most robust age. This approach, applied to high-spatial-resolution images, makes it possible for the first time to obtain satisfactory ages on maps as small as 100 µm x 100 µm.

This article presents a new method to date geological events affecting sedimentary rocks. This method relies on the potential for the zircon U-Pb system to be disturbed during fluid-flow, alteration, and metamorphic events in sedimentary rocks. This article presents synthetic datasets for benchmarking the accuracy and precision of the discordance dating method, as well as data from detrital zircons found in the contact metamorphic aureole surround the Alta stock.

We have built a database of (U-Th)/He ages and U and Th contents of goethites from various weathering environments. The database contains 2609 (U-Th)/He ages of goethites from 10 countries. The findings presented in this article contribute insights into the distribution of dated goethites from different environments globally and into the Earth's Cenozoic weathering history.

The uranium–thorium (U–Th) and uranium–lead (U–Pb) radiometric dating methods are both suitable for dating carbonate samples ranging in age from about 400 000 to 650 000 years. Here we test agreement between the two methods by dating speleothems (i.e. secondary cave mineral deposits) that are well-suited to both methods. We demonstrate excellent agreement between them and discuss their relative strengths and weaknesses.

We tested the reliability of infrared radiofluorescence (IR-RF) dating of K-feldspar on samples of known age. We compare several measurement protocols and analysis variants and determine the most appropriate version. Additionally, we compare these results with those obtained using infrared photoluminescence (IRPL), an alternative dating method for K-feldspar, for the same samples. Our results confirm the dating potential of IR-RF and highlight similarities and differences to other methods.

Garnet U–Pb dating is useful for dating geologic events. However, contamination by U-rich minerals included in garnet is a risk. Inclusions are often spotted by high-U spikes or large errors in the age. We dated garnets in metamorphic rocks and calculated ages 10–15 Myr older than expected, reflecting contamination by the mineral zircon. We provide recommendations for identifying contamination and suggest that the bulk dating of zircon inclusions in garnet may also provide valuable information.

Laser-based dating of rocks and minerals is invaluable in geoscience. This study significantly advances our ability to model and correct for a process called down-hole fractionation (DHF) that impacts the accuracy and uncertainty of dates. We develop an algorithm that quantitatively models DHF patterns but can be used on other geoscientific data. The implications are far-reaching: improved accuracy, reduced uncertainty, and easier comparisons between different samples and laboratories.

We used step heating to separate cosmogenic ³He from mantle ³He in olivine xenocrysts in which the mantle helium component is in high concentration after sample powdering. By isolating the matrix-sited cosmogenic ³He at low temperature, we were able to date four different lava flows on Volcano Mountain, the youngest eruptive center in the Fort Selkirk volcanic province in Yukon, Canada.  The four flows, including the stratigraphically youngest on the mountain, erupted coevally, at 10.5 ± 1.7 ka.

This paper describes measurements of cosmogenic neon-21 concentrations in a widely distributed mineral standard material that is routinely used for quality control and interlaboratory comparison for measurements of other cosmic-ray-produced nuclides useful for various geochronology applications. Broadly, this facilitates improvement of precision and accuracy of these measurements and their applications in geochronology.

Accurate readings on the environmental gamma dose rate are important. Portable gamma-ray detectors, such as those that are NaI- or LaBr₃-based, are easy to handle and affordable. Limited information on alternatives, like CZT (cadmium zinc telluride) detectors, is available. We tested CZT detectors and found them suitable for in-field deployment. We used simulations and field tests to evaluate the optimal energy threshold for direct dose rate readings, making the CZT system a reliable alternative.

Sediment generation on hillslopes and transport through river networks are complex processes that influence landscape evolution. In this study, we compiled sand from 766 river basins and measured its subtle radioactivity to unravel timelines of sediment routing around the world. With these data, we empirically confirm that sediment from large lowland basins in tectonically stable regions typically experiences long periods of burial, while sediment moves rapidly through small upland basins.

In this contribution, we demonstrate in situ monazite lutetium–hafnium dating and compare results with uranium–lead dating. We present data from monazite reference materials and complex samples to demonstrate the viability of this method. We show that in situ lutetium–hafnium dating of monazite can resolve multiple age populations and may find use in scenarios where the uranium–lead system has been compromised.