The characteristic 1.54‐μm emission from the rare‐earth element erbium implanted in GaAs, InP, and GaP was investigated through 10‐K photoluminescence essentially as a function of anneal temperature, time, and method. The strip‐heater, forming‐gas, and quartz‐ampoule anneal methods were util...
Rare earth element and yttrium compositions of the Paleoproterozoic Yuanjiacun BIF in the Lüliang area and their implications for the Great Oxidation Even... In China, most Precambrian banded iron formations (BIFs) are situated in the North China Craton. The Yuanjiacun iron deposit, located in...
The common presence of plagioclase (albite) as phenocrysts and the absence of hydrous minerals (amphibole and biotite) indicate that the water content of albite porphyry is low. Trace‐element compositions of whole rocks and zircon grains from these ore‐bearing porphyries were measured. Zircon ...
Rare earth elements in the Sudbury Nickel Irruptive; comparison with layered gabbros and implications for nickel irruptive petrogenesis The rare earth element content of rocks from the Sudbury Nickel Irruptive has been determined by neutron activation analysis. The Irruptive rocks are characterized by ...
According to the regional distribution of rare earth elements, the source of the northern Ordos basin come form the Yinshan ancient land, and the source had zonation in east and west area. The sediment differentiation affections control the enrichment of rare earth element. With mudstone particle ...
Characteristics of Rare Earth and Trace Element Patterns in Bedded Cherts from the Bottom of the Lower Cambrian in the N The sedimentary sequence of the Lower Cambrian is a key interval to reveal the early evolution history of the Earth and there occur widespread cherts worldwide. These cherts ...
Qinzhou- Hangzhou metallogenic belt is an important metallogenic belt of southern China,the southern section of Donggangling Limestone is very important. It includes sericite shale,dense limestone and dolomitic limestone and carbonaceous limestone. The results show that the content of total rare earth(...
Indication of rare earth element characteristics to dolomite petrogenesis--A case study of the fifth member of Ordovician Majiagou Formation in the Ordos Basin, central China. Mar. Pet. Geol. 2018, 92, 1028-1040. [CrossRef]
In the view of element ratios, the ratios of Ba/La, K/La, K/Th, Nb/La, Th/La and Y/La of the supra-crust of Tianshan region are identical to those of upper crust of global continent, but the ratios of K/Na, La/As and La/Sb are significantly smaller than those of continental...
The volcanic rocks, as the wall/host rocks of the deposit, were formed in an island arc tectonic setting according to their trace element geochemistry. Three genetic types of pyrite have been distinguished in the deposit; the framboidal, the anhedral-subhedral (with a large amount of pyrit...