中国绿岩带型金矿.pptxVIP

会计学 1 中国绿岩带型金矿 第1页/共82页 汇报提纲 何为绿岩带？何为绿岩带型金矿床？ 中国绿岩带型金矿床产出背景 中国绿岩带型金矿床的分类 中国绿岩带型金矿床特征 中国绿岩带型金矿床的成矿系统 关注问题：花岗岩成矿之辩 第2页/共82页 何为绿岩带？何为绿岩带型金矿床？ 第3页/共82页 重要绿岩带 南非巴伯顿的斯威士兰超群 津巴布韦 加拿大苏必利尔省和斯拉夫省的阿比提比带、耶洛奈夫带等 美国西部怀俄明 西澳皮尔巴拉和伊尔岗地块 印度的达瓦尔超群 俄罗斯科拉半岛 中国华北陆台 第4页/共82页 World distribution of greenstone-hosted quartz-carbonate vein deposits containing at least 30 tonnes of Au. 第5页/共82页 Simplified geological map of the Abitibi greenstone belt showing the distribution of major fault zones and gold deposits. Modified from Poulsen et al. (2000). 第6页/共82页 Tonnage and grade repartition for gold deposits in the world containing at least 30 tonnes of Au. 第7页/共82页 Table 1: Most productive Canadian districts for GQCV deposits District Geological Province Production Reserves (tonnes Au)* Resources (tonnes Au)* Timmins Superior/Abitibi 2,072.9 78.5 Kirkland Lake Superior/Abitibi 794.8 72.6 Val dOr Superior/Abitibi 638.9 171.6 Rouyn-Noranda Superior/Abitibi 519.6 66.5 Larder Lake Superior/Abitibi 378.7 14.5 Malartic Superior/Abitibi 278.7 686.8 Red Lake** Superior/Uchi 128.0 17.2 Joutel Superior/Abitibi 61.4 27.5 Matheson Superior/Abitibi 60.4 9.7 Cadillac Superior/Abitibi 22.1 25.1 Pickle Lake Superior/Uchi 90.4 8.1 Rice Lake Superior/Uchi 51.6 25.2 Beardmore-Geraldton Superior/Wabigoon 123.5 35.1 Michipicoten Superior/Wawa 41.1 2.8 Mishibishu Superior/Wawa 26.7 16.8 Goudreau-Lolshcach Superior/Wawa 8.8 19.6 Flin Flon Churchill 62.2 12.7 Lynn Lake Churchill 19.5 14.6 La Ronge Churchill 3.4 5.6 Keewatin Churchill-Hearne 7.2 252.4 Yellowknife Slave 432.8 16.6 MacKenzie Slave 38.1 286.6 Cassiar Cordillera 14.9 55.4 Baie Verte Appalachian/Dunnage 10.3 8.9 *as of December 31, 2002**does not include the Campbell-Red Lake, Cochenour and MacKenzieRed Lake deposits as they are not considered typical GQCV deposits 第8页/共82页 第9页/共82页 第10页/共82页 绿岩带 绿岩带（greenstone belt）是蚀变或变质的基性火成岩带。通常指前寒武纪地盾中呈条带状分布的变质基性岩地区，如太古绿岩带等。一个绿岩带中可含有一层或几层基性火山-沉积变质产物。主要岩石类型有细碧岩、玄武岩、辉长岩和辉绿岩等。因变质作用生成的绿泥石、绿帘石、阳起石等矿物促使岩石普遍具