A mineral that forms under conditions as variable as diagenesis to deep subduction, melt
crystallization to low temperature alteration, and that retains information on time …

The distribution pattern of U-Pb ages of detrital zircon in a sedimentary rock is commonly
assumed to reflect the ages of igneous or metamorphic processes in rocks that have …

Ultrahigh temperature (UHT) metamorphism is the most thermally extreme form of regional
crustal metamorphism, with temperatures exceeding 900° C. UHT crustal metamorphism is …

No crustal rocks are known to have survived since the time of the intense meteor
bombardment that affected Earth between its formation about 4,550 Myr ago and 4,030 Myr …

Granitoid gneisses and supracrustal rocks that are 3,800–4,000 Myr old are the oldest
recognized exposures of continental crust. To obtain insight into conditions at the Earth's …

The most widely used technique for the determination of high precision mineral growth ages
in igneous and metamorphic rocks is dating of zircons with the U‐Pb method. The …

High-pressure (HP) mafic granulites are widely distributed as sheet-like and lenticular
bodies within highly deformed tonalitic gneisses in the Sanggan area, North China Craton …

Lead diffusion has been measured in natural titanite using two different methods to
introduce the diffusant:(1) implantation of Pb ions; and (2) immersion of the crystals in a PbS …

We have developed a procedure for precise in situ elemental and isotope ratio
measurements by simultaneous solution nebulization and laser ablation inductively coupled …

Ion microprobe U–Th–Pb analyses of baddeleyite and zircon yield precise estimates of the
age of Neoproterozoic mafic magmatism associated with initial rifting in the Adelaide …