id	author	title	date	pages	extension	mime	words	sentence	flesch	summary	cache	txt
geusb-4919	Stendal, Henrik; Secher, Karsten; Frei, Robert	207Pb-206Pb dating of magnetite, monazite and allanite in the central and northern Nagssugtoqidian orogen, West Greenland	2006	14	.pdf	application/pdf	7381	361	63	Pb-isotopic data of sul- phides from Proterozoic rocks yield a well-defined linear trend in a Pb-Pb isochron diagram, with a slope correspond- ing to an age of ~1900 Ma, and indicative of a primitive (i.e. low µ) source character of Pb in that mineralisation. Analyses of the magnetite define a Pb-Pb isochron age of 1726 ± 7 Ma.	cache/geusb-4919.pdf	txt/geusb-4919.txt