While the first characteristic will be discussed in more detail in the following section, the depletion of some trace elements in the most evolved clinopyroxene might be interpreted as due to co-precipitation of phases with high partition coefficients for certain elements, such as apatite (LREE), zircon (Zr, Hf, Th, U),
baddeleyite (Zr, Hf, U), amphibole (Nb) and phlogopite (Ba, Nb, V).
In a recently published paper in Nature, Moser's team showed that the
baddeleyite crystals in NWA 5298 must have crystallized from molten rock only 200 million years ago, a fairly recent date compared to other estimates of up to four billion years for Martian shergottites.
The nature of the ore--containing iron, apatite and
baddeleyite--prompted the technical staff to develop innovative technology during the '70s and '80s that enabled the mine to effectively recover all three components, using magnetic separation for the iron content, flotation for the apatite, and gravity separation for the
baddeleyite.
U-Pb zircon and
baddeleyite ages for the Palisades and Gettysburg sills of the northeastern United States: Implications for the age of the Triassic/Jurassic boundary.
Other associated minerals include calcite, dolomite, analcime, fluorite and weloganite, and very rarely also
baddeleyite, dachiardite-Na, mordenite and bastnasite.
A precise U-Pb zircon and
baddeleyite age for the Long Range dikes, southeast Labrador.
Birmingham (1987) reported
baddeleyite as very small crystals in the groundmass of a phonotephrite dike at the Isabella mine.
2002, Feasibility of chemical U-Th-total Pb
baddeleyite dating by electron microprobe: Chemical Geology, v.
Three single grain U-Pb analyses of zircon and zircon overgrowths of
baddeleyite yield a discordia line with upper and lower intercepts of 3490 [+ or -] 2 and 1305 [+ or -] 19 Ma (MSWD = 0.
Baddeleyite and the niobium mineral pyrochlore are also present.
The book discusses the geological structure and its component rocks and then describes the different deposits of
baddeleyite, apatite, magnetite, vermiculite, francolite, apatite-carbonate ores and carbonatites, summarizing their nature, extent and mining.
Baddeleyite and the niobium mineral pyrochlore are also present, the latter occurring throughout the weathering profile, reaching a maximum concentration of 3% at the top of the mottled layer.
