摘要
杜荒岭金矿床是产于石英闪长岩、受压性、压扭性断裂和爆破角砾岩筒联合控制的浅成中温岩浆热液矿床。流体包裹体研究表明：①流体包裹体的类型以气液两相包裹体为主，其次为纯液相包裹体、气相包裹体及少量含NaCl子矿物三相原生流体包裹体，成矿流体属NaCl-H2O体系；②主成矿阶段均一温度为200℃-375℃，集中在230℃～320℃；流体具有低密度（0．68～0．94g／cm^3），低盐度（3．39～13．07（wt％，NaCl））的特征，成矿压力为7．5～14．3MPa，估算成矿深度1．2～1．6km；③结合新近同位素、微量元素及年代学研究成果，认为杜荒岭金矿主要与晚燕山期岩浆活动有关，成矿流体源于岩浆热液，流体上升过程中发生隐爆和沸腾作用，同时伴有部分大气降水加入，导致成矿物质快速沉淀富集。
Duhuangling gold deposit formed in the quartz diorite, is a hypabyssal medium temperature magmatic hydrothermal deposit, which is controlled by both compressive and compress-shear fault and crypto-explosive breccia cone. The study of fluid inclusion shows that ： ① the type of the fluid inclusion is mainly gas-liquid biphase inclusions, associated with some pure liquid inclusions and pure volatile inclusions, and a few NaCl minerals-bear-ing polyphase inclusions, with the ore-forming fluid belonging to H20-NaCl system. （~）The homogenization temper- ature of the fluid inclusion at the major merallogenic stage ranges from 200℃ to 375℃, concentrating on 230 320℃. The fluid is characterized by low density （0. 68 - 0. 94 g/cm^3） and low salinity （3.39 - 13.07 % NaCl eqv）. The ore-forming pressure is 7.5 - 14. 3 MPa, and the estimated metallogenic depth is 1.2 - 1.6 km. ③ Combined with the recent progress in study as isotopic, trace element and metallogenic chronology, the authors sug- gest that the Duhuangling gold deposit was related to late Yanshannian magmatic activity, and the ore-forming fluids were mainly derived from magmatic hydrothermal fluids. Concealed explosion and boiling occurred during their as- cending process along with the participation of meteoric water, resulting in a rapid deposition and enrichment of metallogenie material.
出处
《世界地质》
CAS
CSCD
2013年第4期717-724,共8页
World Geology
基金
吉林省汪清县杜荒岭-砂金沟一带金铜成矿规律研究(HJ2012-1)
关键词
流体包裹体
矿床成因
杜荒岭金矿
延边地区
fluid inclusion
genesis of deposit
Duhuangling gold deposit
Yanbian area
