U-Pb dating of zircon grains from the ore-bearing plagioclase amphibolite in the Dashuigou Te deposit

The Dashuigou Te deposit is a unique independent one found in the world, and hosted in the plagioclase amphibolite. The upper intercept age of single zircon from the amphibolite can be considered to be the crystallization age of the source-rock of the amphibolite (tholeiitic basalt), while the lower intercept is nearly consistent with the time of the tectono-thermal event.

黑龙江省鸡西市恒山片麻杂岩岩石学特征及时代探讨

恒山片麻杂岩主要分布于佳木斯隆起带南缘鸡西市恒山区、麻山区、青山及勃利县一带,与新太古界麻山岩群密切相伴,是佳木斯地块最古老的变质深成侵入岩,1:20万区调报告勃利县幅、鸡西市幅将其归为元古界柳毛组(Pt_1l)及西麻山组(Pt_1x),1:25万区调报告鸡西幅将其归为新太古代变质深成岩(Ar_3H),作者通过分析佳木斯地块最新研究成果,并利用单颗粒锆石U-Pb测年结果,将恒山片麻杂岩划为新元古代,为佳木斯地块的形成与演化提供了新的证据。