m 0cm 0pt" class=MsoNormal>ang=EN-US>The Huangshan mafic-ultramafic rock belt in ml:namespace prefix = st1 ns = "urn:schemas-microsoft-com:office:smarttags" />ace w:st="on">aceName w:st="on">EastaceName> aceName w:st="on">TianshanaceName> aceType w:st="on">MountainsaceType>ace> has around much interest among geologists due to the development of many mafic-ultramafic intrusions and nickel-copper magmatic sulfide deposits. A study of the mineral microstructure characteristics and the calculation show that in Sidingheishan intrusion, olivine was the first crystallized mineral, followed by bronzite and diopside, whose crystallization temperatures were about hmetcnv w:st="on" TCSC="0" NumberType="1" Negative="False" HasSpace="True" SourceValue="1100" UnitName="℃">1100 mso-bidi-font-family: 宋体" lang=EN-US>ang=EN-US>℃hmetcnv> and 900mso-ascii-font-family: ’Times New Roman’; mso-hansi-font-family: ’Times New Roman’">～hmetcnv w:st="on" TCSC="0" NumberType="1" Negative="False" HasSpace="True" SourceValue="1100" UnitName="℃">ang=EN-US>1100 mso-bidi-font-family: 宋体">℃hmetcnv>ang=EN-US>, respectively, and the two minerals in the rock can coexist.