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- W2386702008 abstract "s: Dongzigou(洞子沟) silver-polymetal deposit is new type silver deposit in North China Craton. The minerogentic background and geological characteristics reported in the past, it is suggested that the is volcanogene hydrothermal one related middle Proterozoic (1 683～1 625 Ma) volcanic action. The mineralitic age is not very clear because the direct timing technique is not available for most ore. Fortunately, a basic dyke intruding into the ore body has been discovered in Bianqianggou(边墙沟), south of Dongzigou(洞子沟) miner field. The isotopic composition of six whole rock samples from the basic dyke can yield two comparative precise lines respectively, the first Sm Nd isochron age is (1 521±4)Ma with INd =0.511 017,eNd(t)=+6.8,the second one is 1 521 Ma with INd =0.510 825,eNd(t)=+3.0. The likely explanation of these ages is that the basic dyke is intruded into the ore body at～1 521 Ma, and the mineralitic age should be older than 1 521 Ma. The lead isotopic age also take out about 1 600～1 700 Ma data. Based on these studies, it can be deduced that the mineralitic age is between 1 683 Ma to 1 521 Ma." @default.
- W2386702008 created "2016-06-24" @default.
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- W2386702008 date "2001-01-01" @default.
- W2386702008 modified "2023-09-25" @default.
- W2386702008 title "On the Age of Mineralization in the Dongzigou Silver-polymetal Deposit, Xinglong Area Hebei Province" @default.
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