Using isotope analysis of ancient (4555 Ma) radiogenic Pb by ID-TIMS as an example, I
evaluate the sample size required to achieve the target precision of the 207Pb/206Pb ratio …

High-precision Ni isotope analyses of the differentiated andesitic meteorite Erg Chech 002
(EC 002), the oldest known crustal fragment of a planetesimal, show that short-lived 60Fe …

In this study we test the possibility that radiogenic 207 Pb/206 Pb ratios (207 Pb*/206 Pb*) in
meteorites can be fractionated during partial dissolution, and explore the consequences of …

The base of the ICS (International Commission on Stratigraphy) Geological Time Scale was
ratified in 2022 by defining a new Global Stratigraphic Standard Age (GSSA) for the lower …

This study conducts mineralogical and chemical investigations on the oldest achondrite, Erg
Chech 002 (∼ 4565 million yr old). This meteorite exhibits a disequilibrium igneous texture …

The radioactive decay of short-lived 26 Al–26 Mg has been used to estimate the timescales
over which 26 Al was produced in a nearby star and the protosolar disk evolved. The …

The Rbsingle bondSr isotopic system is an important cosmochemical tool for constraining
the evolution of moderately volatile (Rb) and refractory (Sr) elements in the earliest Solar …

Pb-isotopic dating of the recently discovered diabasic angrite Northwest Africa (NWA) 12320
yielded ages of 4564.17±0.50 Ma and 4562.82±0.37 Ma for acid-insoluble and soluble …

Thermal evolutionary models of an evolving ensemble of planetesimals and collision
induced fragments of sizes 4–240 km, gradually accreting or fragmenting on a planetary …

Planetesimals are the “building blocks of planets” that formed from dust accretion in the
Sun's protoplanetary disk. It is established that the largest and early-formed planetesimals …