an" class=MsoNormal>an’,’serif’; FONT-SIZE: 12pt; mso-fareast-font-family: 宋体; mso-font-kerning: 0pt" lang=EN-US>///This paper reports biotite and muscovite single-grain mineral Rb-Sr ages and geochemical results for the Weishan granite, a typical Mesozoic composite granitic pluton in South China that includes Xinpu highly-evolved granite, Tangshi biotite monzogranite and Xiangzikou two-mica granite, probing into multistage magmatisms and implications for the petrogenetic and metallogenic processes. The results show that: 1an’’; mso-hansi-font-family: ’’Times New Roman’’; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">）an’,’serif’; FONT-SIZE: 12pt; mso-fareast-font-family: 宋体; mso-font-kerning: 0pt" lang=EN-US> biotite that crystallized at (227.0an’’; mso-hansi-font-family: ’’Times New Roman’’; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">±an’,’serif’; FONT-SIZE: 12pt; mso-fareast-font-family: 宋体; mso-font-kerning: 0pt" lang=EN-US>13) Maan’’; mso-hansi-font-family: ’’Times New Roman’’; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">（an’,’serif’; FONT-SIZE: 12pt; mso-fareast-font-family: 宋体; mso-font-kerning: 0pt" lang=EN-US>MSWD=1.6an’’; mso-hansi-font-family: ’’Times New Roman’’; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">）an’,’serif’; FONT-SIZE: 12pt; mso-fareast-font-family: 宋体; mso-font-kerning: 0pt" lang=EN-US> from the Xinpu highly-evolved granite is low in Al, Mg, Rb and ACNK ratios, but high in Fe and Fe/an’’; mso-hansi-font-family: ’’Times New Roman’’; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">（an’,’serif’; FONT-SIZE: 12pt; mso-fareast-font-family: 宋体; mso-font-kerning: 0pt" lang=EN-US>Fean’’; mso-hansi-font-family: ’’Times New Roman’’; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">＋an’,’serif’; FONT-SIZE: 12pt; mso-fareast-font-family: 宋体; mso-font-kerning: 0pt" lang=EN-US>Mgan’’; mso-hansi-font-family: ’’Times New Roman’’; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">）an’,’serif’; FONT-SIZE: 12pt; mso-fareast-font-family: 宋体; mso-font-kerning: 0pt" lang=EN-US> ratios; 2an’’; mso-hansi-font-family: ’’Times New Roman’’; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">）an’,’serif’; FONT-SIZE: 12pt; mso-fareast-font-family: 宋体; mso-font-kerning: 0pt" lang=EN-US> biotite that crystallized at (221.9an’’; mso-hansi-font-family: ’’Times New Roman’’; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">±an’,’serif’; FONT-SIZE: 12pt; mso-fareast-font-family: 宋体; mso-font-kerning: 0pt" lang=EN-US>5.8) Maan’’; mso-hansi-font-family: ’’Times New Roman’’; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">（an’,’serif’; FONT-SIZE: 12pt; mso-fareast-font-family: 宋体; mso-font-kerning: 0pt" lang=EN-US>MSWD=3.8an’’; mso-hansi-font-family: ’’Times New Roman’’; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">）an’,’serif’; FONT-SIZE: 12pt; mso-fareast-font-family: 宋体; mso-font-kerning: 0pt" lang=EN-US> from the Weishanan’’; mso-hansi-font-family: ’’Times New Roman’’; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">＇an’,’serif’; FONT-SIZE: 12pt; mso-fareast-font-family: 宋体; mso-font-kerning: 0pt" lang=EN-US>s main body, the Tangshi biotite monzogranite, is high in Mg and Sr, but low Fe/an’’; mso-hansi-font-family: ’’Times New Roman’’; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">（an’,’serif’; FONT-SIZE: 12pt; mso-fareast-font-family: 宋体; mso-font-kerning: 0pt" lang=EN-US>Fean’’; mso-hansi-font-family: ’’Times New Roman’’; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">＋an’,’serif’; FONT-SIZE: 12pt; mso-fareast-font-family: 宋体; mso-font-kerning: 0pt" lang=EN-US>Mgan’’; mso-hansi-font-family: ’’Times New Roman’’; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">）an’,’serif’; FONT-SIZE: 12pt; mso-fareast-font-family: 宋体; mso-font-kerning: 0pt"> ang=EN-US>and Rb/Sr ratios; and 3an’’; mso-hansi-font-family: ’’Times New Roman’’; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">）an’,’serif’; FONT-SIZE: 12pt; mso-fareast-font-family: 宋体; mso-font-kerning: 0pt" lang=EN-US> biotite from the Xiangzikou two-mica granite, formed at (210.1an’’; mso-hansi-font-family: ’’Times New Roman’’; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">±an’,’serif’; FONT-SIZE: 12pt; mso-fareast-font-family: 宋体; mso-font-kerning: 0pt" lang=EN-US>3.3) Maan’’; mso-hansi-font-family: ’’Times New Roman’’; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">（an’,’serif’; FONT-SIZE: 12pt; mso-fareast-font-family: 宋体; mso-font-kerning: 0pt" lang=EN-US>MSWD=0.21an’’; mso-hansi-font-family: ’’Times New Roman’’; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">）an’,’serif’; FONT-SIZE: 12pt; mso-fareast-font-family: 宋体; mso-font-kerning: 0pt" lang=EN-US> that were determined by single-grain muscovite Rb-Sr isochron age, is low Sr and high in Al, Rb, ACNK and Rb/Sr ratio; and 4an’’; mso-hansi-font-family: ’’Times New Roman’’; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">）an’,’serif’; FONT-SIZE: 12pt; mso-fareast-font-family: 宋体; mso-font-kerning: 0pt" lang=EN-US> muscovite from the Tangshi biotite monzogranite is formed during the hydrothermal process, and is characterized by very low concentrations for most major and trace elements and high Fe/an’’; mso-hansi-font-family: ’’Times New Roman’’; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">（an’,’serif’; FONT-SIZE: 12pt; mso-fareast-font-family: 宋体; mso-font-kerning: 0pt" lang=EN-US>Fean’’; mso-hansi-font-family: ’’Times New Roman’’; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">＋an’,’serif’; FONT-SIZE: 12pt; mso-fareast-font-family: 宋体; mso-font-kerning: 0pt" lang=EN-US>Mgan’’; mso-hansi-font-family: ’’Times New Roman’’; mso-font-kerning: 0pt; mso-bidi-font-family: 宋体">）an’,’serif’; FONT-SIZE: 12pt; mso-fareast-font-family: 宋体; mso-font-kerning: 0pt" lang=EN-US>, Cs/Nb, Rb/Sr ratios, whereas muscovite from the Xiangzikou two-mica granite is formed by metasomatisms of biotite and K-feldspar etc., with higher Al, Ti and Na. Both of the Xinpu highly-evolved granite and the Xiangzikou two-mica granite are potential sources for uranium mineralization, but the latter shows a better perspective because of intense hydrothermal alternation.ang=EN-US>

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