湘东北万古金矿床不同期次黄铁矿微量元素特征及其对金成矿机制的启示
万泰安,许德如,马文,张胜伟,王国建,卞玉冰,李博

Trace Element Characteristics of Different Chronology Pyrite in Wangu Gold Deposit,Northeast Hunan and Its Implication to Gold Mineralization Mechanism
Tai’an WAN,Deru XU,Wen MA,Shengwei ZHANG,Guojian WANG,Yubing BIAN,Bo LI
图5 万古金矿不同岩石类型野外记录、手标本及黄铁矿镜下特征(反射光g、h、j,背散射图像i)
(a)石英脉型矿石,蚀变板岩与石英脉互层;(b)蚀变岩型矿石,石英穿插其中;(c)角砾岩型矿石,石英呈浸染状;(d)石英脉型矿石中可见石英、方解石、毒砂和黄铁矿(Py3);(e)碳质板岩中含有黄铁矿(Py1),出现褪色化蚀变;(f)蚀变板岩被石英穿插,蚀变板岩中可见毒砂和黄铁矿(Py3);(g)黄铁矿(Py2)呈他形,与菱铁矿共生;(h)黄铁矿中的Py1和Py2阶段,呈自形—半自形,Py1为核部表面光滑,Py2为幔部呈多孔结构;(i)BES图像下与黄铁矿Py3共生的毒砂,环带发育较好,未见多期次的毒砂;(j)黄铁矿中的Py2和Py3阶段,呈自形,Py2为核部呈多孔结构,Py3为幔部表面光滑;Sd-菱铁矿;Apy-毒砂;Py-黄铁矿;Cc-方解石
Fig.5 Field records,hand specimens and microscopic characteristics of pyrite in different rock types of the Wangu gold deposit (reflected light-g,h,j;BSE-i)