pan lang="EN-US">The Luozha Miocene leucogranite intrusive whose zircon U-Pb age is 17.7Ma is located in the eastern part of high Himalayan leucogranite belt. Luozha leueogranites are high-K ca/c-alkaline and strongly pera/uminous pan>pan style="font-family: 宋体; mso-ascii-font-family: calibri; mso-ascii-theme-font: minor-latin; mso-fareast-font-family: 宋体; mso-fareast-theme-font: minor-fareast; mso-hansi-font-family: calibri; mso-hansi-theme-font: minor-latin">（pan>pan lang="EN-US"> A/CNK pan>pan style="font-family: 宋体; mso-ascii-font-family: calibri; mso-ascii-theme-font: minor-latin; mso-fareast-font-family: 宋体; mso-fareast-theme-font: minor-fareast; mso-hansi-font-family: calibri; mso-hansi-theme-font: minor-latin">〉pan>pan lang="EN-US"> 1.1 pan>pan style="font-family: 宋体; mso-ascii-font-family: calibri; mso-ascii-theme-font: minor-latin; mso-fareast-font-family: 宋体; mso-fareast-theme-font: minor-fareast; mso-hansi-font-family: calibri; mso-hansi-theme-font: minor-latin">）pan>pan lang="EN-US">, including tourmaline bearing muscovite leucogranites and tourmaline bearing two-mica leucogranites. The SiO2 and Al2O3 of these rocks range from 72. 75% to 74. 62%, 14.45% to 15.48% , respectively. These leucogranites are slight right incline, showing the fractionation between LREE and HREE, and display strongly negative Eu anomalies pan>pan style="font-family: 宋体; mso-ascii-font-family: calibri; mso-ascii-theme-font: minor-latin; mso-fareast-font-family: 宋体; mso-fareast-theme-font: minor-fareast; mso-hansi-font-family: calibri; mso-hansi-theme-font: minor-latin">（pan>pan lang="EN-US"> Eu/Eu pan>pan style="font-family: 宋体; mso-ascii-font-family: calibri; mso-ascii-theme-font: minor-latin; mso-fareast-font-family: 宋体; mso-fareast-theme-font: minor-fareast; mso-hansi-font-family: calibri; mso-hansi-theme-font: minor-latin">＊pan>pan lang="EN-US"> = 0. 57 pan>pan style="font-family: 宋体; mso-ascii-font-family: calibri; mso-ascii-theme-font: minor-latin; mso-fareast-font-family: 宋体; mso-fareast-theme-font: minor-fareast; mso-hansi-font-family: calibri; mso-hansi-theme-font: minor-latin">）pan>pan lang="EN-US">, enrichments in LILE, and lack of HFSE. The high Rb/Sr pan>pan style="font-family: 宋体; mso-ascii-font-family: calibri; mso-ascii-theme-font: minor-latin; mso-fareast-font-family: 宋体; mso-fareast-theme-font: minor-fareast; mso-hansi-font-family: calibri; mso-hansi-theme-font: minor-latin">（〉pan>pan lang="EN-US">4pan>pan style="font-family: 宋体; mso-ascii-font-family: calibri; mso-ascii-theme-font: minor-latin; mso-fareast-font-family: 宋体; mso-fareast-theme-font: minor-fareast; mso-hansi-font-family: calibri; mso-hansi-theme-font: minor-latin">）pan>pan lang="EN-US"> and low CaO/Na20 pan>pan style="font-family: 宋体; mso-ascii-font-family: calibri; mso-ascii-theme-font: minor-latin; mso-fareast-font-family: 宋体; mso-fareast-theme-font: minor-fareast; mso-hansi-font-family: calibri; mso-hansi-theme-font: minor-latin">（pan>pan lang="EN-US">0. 19 -0. 26pan>pan style="font-family: 宋体; mso-ascii-font-family: calibri; mso-ascii-theme-font: minor-latin; mso-fareast-font-family: 宋体; mso-fareast-theme-font: minor-fareast; mso-hansi-font-family: calibri; mso-hansi-theme-font: minor-latin">）pan>pan lang="EN-US"> indicate the source of the Luozha leucogranite is pelite. The pan>pan style="font-family: 宋体; mso-ascii-font-family: calibri; mso-ascii-theme-font: minor-latin; mso-fareast-font-family: 宋体; mso-fareast-theme-font: minor-fareast; mso-hansi-font-family: calibri; mso-hansi-theme-font: minor-latin">（pan>pan lang="EN-US">SrSr/SrSrpan>pan style="font-family: 宋体; mso-ascii-font-family: calibri; mso-ascii-theme-font: minor-latin; mso-fareast-font-family: 宋体; mso-fareast-theme-font: minor-fareast; mso-hansi-font-family: calibri; mso-hansi-theme-font: minor-latin">）pan>pan lang="EN-US">,, eNdpan>pan style="font-family: 宋体; mso-ascii-font-family: calibri; mso-ascii-theme-font: minor-latin; mso-fareast-font-family: 宋体; mso-fareast-theme-font: minor-fareast; mso-hansi-font-family: calibri; mso-hansi-theme-font: minor-latin">（pan>pan lang="EN-US">tpan>pan style="font-family: 宋体; mso-ascii-font-family: calibri; mso-ascii-theme-font: minor-latin; mso-fareast-font-family: 宋体; mso-fareast-theme-font: minor-fareast; mso-hansi-font-family: calibri; mso-hansi-theme-font: minor-latin">）pan>pan lang="EN-US"> and pan>pan style="font-family: 宋体; mso-ascii-font-family: calibri; mso-ascii-theme-font: minor-latin; mso-fareast-font-family: 宋体; mso-fareast-theme-font: minor-fareast; mso-hansi-font-family: calibri; mso-hansi-theme-font: minor-latin">εpan>pan lang="EN-US">Hfpan>pan style="font-family: 宋体; mso-ascii-font-family: calibri; mso-ascii-theme-font: minor-latin; mso-fareast-font-family: 宋体; mso-fareast-theme-font: minor-fareast; mso-hansi-font-family: calibri; mso-hansi-theme-font: minor-latin">（pan>pan lang="EN-US">tpan>pan style="font-family: 宋体; mso-ascii-font-family: calibri; mso-ascii-theme-font: minor-latin; mso-fareast-font-family: 宋体; mso-fareast-theme-font: minor-fareast; mso-hansi-font-family: calibri; mso-hansi-theme-font: minor-latin">）pan>pan lang="EN-US"> are 0. 725802 -0. 727276, - 13.4 - - 12. 9 and - 13.9 - -7. 5 respectively, which imply the crustal origin. But the large variation range of pan>pan style="font-family: 宋体; mso-ascii-font-family: calibri; mso-ascii-theme-font: minor-latin; mso-fareast-font-family: 宋体; mso-fareast-theme-font: minor-fareast; mso-hansi-font-family: calibri; mso-hansi-theme-font: minor-latin">εpan>pan lang="EN-US">nfpan>pan style="font-family: 宋体; mso-ascii-font-family: calibri; mso-ascii-theme-font: minor-latin; mso-fareast-font-family: 宋体; mso-fareast-theme-font: minor-fareast; mso-hansi-font-family: calibri; mso-hansi-theme-font: minor-latin">（pan>pan lang="EN-US">tpan>pan style="font-family: 宋体; mso-ascii-font-family: calibri; mso-ascii-theme-font: minor-latin; mso-fareast-font-family: 宋体; mso-fareast-theme-font: minor-fareast; mso-hansi-font-family: calibri; mso-hansi-theme-font: minor-latin">）pan>pan lang="EN-US"> suggest the magma source of leucogranite is complex. Luozha leucogranites are generated during the STDS activity that resulting in the decompression dehydration melting of muscovite in metapelite. Therefore, these melts intruded up along the weakened part of STDS and located around STDS under settings of crust extension and raoid olateau uplift.pan>
