• 责任者：Wang Yanli (China University of Geosciences ; Beijing 100083 ; China) ; Peng Qiming
• 刊名：Geology and Prospecting
• 出版年：2013
• 卷期：49(6)
• 关键词：锡矿 ; tin ores ; 钨矿 ; tungsten ores ; 铌矿 ; niobium ores ; 钽矿 ; tantalum ores ; 广西 ; Guangxi Province
• 页码：p.1046-1055
• 图表：7 illus., 1 table, 39 refs.
• 分类号：1001
• issnNo：ISSN0495-5331
• isbnNo：CN11-2043/P

     Tin-tungsten polymetallic mineralization is generally related to Li-F-rich alkali feldspar granites, and large-scale liquid immiscibility usual- ly occurred in its late magmatic stage. In the Limu tin-tungsten-niobium-tantalum deposit, rock masses related to the mineralization include red medium- grained alkali feldspar granite and white fine-grained alkali feldspar granite （ albite granite）. The mineralization occurred near the top of the alkaline gran- ite, and the main mineralization types include granite-type tungsten-tin-niobium-tantalum mineralization, pegmatite-type tungsten mineralization, feldspar- quartz-vein type tungsten mineralization and quartz-vein-type tungsten-tin mineralization. A liquid immiscibility phenomenon is commonly found in the al- kali feldspar granites, including ore inclusions, pegmatite-aplite dykes and apalite. Geological and geochemical studies show that the liquid immiscibility runs through the whole stage of granite evolution. The ore inclusions represent the magma which is rich in volatile components and W-Sn-Nb-Ta, and the pegmatite-aplite dykes are also the product of liquid immiscibility. In these processes, ore-forming elements of W, Sn, Nb and Ta as well as volatile com- ponents are constantly enriched, forming different kinds of mineralization. The different mineralization corresponds to the different stages of magmatic liq- uid immiscibility. And an ore-forming model of liquid immiscibility evolution is established for the Limu deposit.