<P style="MARGIN: 0cm 0cm 0pt; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; mso-pagination: widow-orphan; mso-outline-level: 2" class=MsoNormal>pt; mso-bidi-font-family: 宋体; mso-font-kerning: 18.0pt" lang=EN-US>Analysis on the Ore-Forming Mechanism and Potential of Cu-Ni Sulfide Deposits in Baotan Area, pace prefix = st1 ns = "urn:schemas-microsoft-com:office:smarttags" />place w:st="on">w:st="on">Guibei Region, w:st="on">Chinaplace>pace prefix = o ns = "urn:schemas-microsoft-com:office:office" />p>p>
摘要
<P style="MARGIN: 0cm 0cm 0pt" class=MsoNormal>pt" lang=EN-US>///The Cu-Ni sulfide deposits on the edge of Yangtze platform were formed during Proterozoic Period in Baotan region in northern Guangxi Province, pace prefix = st1 ns = "urn:schemas-microsoft-com:office:smarttags" />w:st="on">place w:st="on">Chinaplace>. Abundant Cu-Ni sulfide deposits (or ore spots) are widely distributed in mafic-ultramafic intrusions of the Sipu group, with the chemical composition of the SiO2 ranging from 41.86% to 49.35% , MgO ranging from 17.01% to 27.3% , Na2O + K2O ranging from 0.06% to 1.17% , and TiO2 ranging 0.41% to 0.54%. The ratio of the M/F varies from 1.56 to 2.84. In aspects of S isotope, the value of the δ34S isotope ranges from 4.2‰ to 15.43‰; the total abundance of the rare-earth elements (∑REE) varies from 45.05 × 10-6 to 84.07 × 10-6; ΣLREE/ΣHREE varies from 1.00 to 1.93; the ratio of LaN /YbN ranges from 1.19 to 5.74; δEu ranges from 0.54 to 1.14. It is showed by mentioned above that many geologic characteristics, geochemical characteristics and isotope characteristics on Cu-Ni sulfide deposits in Sipu region were uniform in many aspects and had good geological forming-ore foundation and prospected potential of magmatic Cu-Ni sulfide deposits, compared with other domestic major magmatic Cu-Ni sulfide deposits.pace prefix = o ns = "urn:schemas-microsoft-com:office:office" />p>p>