Lead isotopic systematics of massive sulphide deposits in the Urals: Applications for geodynamic setting and metal sources
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- 作者：Svetlana G. Tessalinaa ; ; Richard J. Herringtonb ; Rex N. Taylorc ; Krister Sundbladd ; Valery V. Maslennikove ; Jean-Jacques Orgevalf
- 关键词：Pb isotopes ; Urals ; Island arc ; Massive sulphide deposits
- 刊名：Ore Geology Reviews
- 出版年：2016
- 出版时间：January 2016
- 年：2016
- 卷：72
- 期：part_P1
- 页码：22-36
- 全文大小：1481 K
文摘
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The Pb isotopic ratios and μ (238U/204Pb) values across Urals VHMS deposits display increase from fore-arc to back-arc settings.
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The Pb model ages decrease from fore-arc (~700Ma) to back arc (ca. 400Ma) settings.
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The most radiogenic Pb isotopic composition is similar with the Urals MORBs derived from highly depleted metasomatized mantle.
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The range of Pb isotopic ratios of volcanics matches the ores, with the exception of felsic volcanics being less radiogenic.
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The unradiogenic source of lead may be represented by Neoproterozic oceanic crust, or/and old Archean continental crust.