Table 4. Reconnaissance U-Pb isotope dating, zircon megacryst, Tumbarumba gemfield. graincolourU (ppm)Th (ppm)206Pb/238 U±1age±1 (Ma)Pb*%cPbB2orange brown174460500.00362±1823.3±1.2122.4 206 Pb/ 238 U

Zenodo2025-05-08 更新10

Selected Data from Preliminary Report on the Timmins-Kirkland Lake Area Gold Deposits File

矿床勘探

矿产资源评估

Data on gold deposits are extracted from an existing publication to enable analysis. The data comprise selected portions of a data set that are published by C.J. Hodgson in "Preliminary Report on the

U.S. Geological Survey2017-01-01 更新80

Uten navn

铜矿勘探

矿床勘探

Tangvald Kobberskjerp. Ref. N.G.U.Rapport nr. 126. Forekomsten består av en vannfylt 1,5 meter bred 7 meter lang dagstrosse langs en NS-gående mineralisert kvartsgang langsetter...

B2FIND40