The Age of Hubi Copper (Cobalt) Ore Mineralization in the Zhongtiao Mountain Area, Southern Margin of the Trans-North China Orogen: New Constraints from U-Pb Dating of Rutile and Monazite

The Hubi copper (cobalt) ore district, one of the largest typical examples sediment-hosted stratiform type in Zhongtiao Mountain area, is located on southern margin Trans-North China Orogen within North Craton (NCC) and has a reserve 0.79 Mt. Mineralization mainly hosted by Group, sequence metasedimentary rocks deposited from ~2168 Ma to ~2059 Ma. Subsequently, collisional orogeny (Trans-North Orogen) occurred at ~1.85 Ga. absolute age mineralization not been well constrained due lack suitable minerals for dating. Rutile monazite are common accessory intergrown with Cu Cu-bearing veins Hubi-type deposits. This study presents first new LA-ICP-MS U-Pb ages hydrothermal rutile Tongmugou Laobaotan deposits which yield lower intercept 1815 ± 30 (Mean Squared Weighted Deviation, MSWD = 5.0) 1858 27 (MSWD 5.2) 1876 5.9) Laobaotan. Monazite crystals separated carbonate orebody weighted mean 207Pb/206Pb 1856 14 1.9), close that error. Mineralogical observations geochemical characteristics suggest both crystallized fluid system closely related sulfide mineralization. Therefore, their nearly identical isotope ca. 1850 directly reflects timing metamorphic indistinguishable metamorphism during led final amalgamation Eastern Western Blocks. According previous studies, primary sedimentary was synchronous deposition Group. From perspective age, Congolese–Zambian Copperbelt district experienced early preorogenic diagenetic late orogenesis, may also be some oldest stratiform-type world. Moreover, this spread throughout area.