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首页> 外文会议>Pacific Rim Congress >Origin of Sedimentary Rock-Hosted Gold Mineralisation at Kyaukpahto, Kawlin-Wuntho District, Northern Myanmar
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Origin of Sedimentary Rock-Hosted Gold Mineralisation at Kyaukpahto, Kawlin-Wuntho District, Northern Myanmar

机译：Kyaukpahto，Kawlin-Wunntho区，缅甸北部的沉积岩石主持金矿化的起源

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The Kyaukpahto gold deposit is located at latitude 23° 47' 55"N and longitude 95° 56' 35"E in the Kawlin-Wuntho district, Sagaing Division, Myanmar. Gold mineralisation is hosted in sandstone of the Male Formation (Eocene) and occurs as stockworks and disseminations. The high-grade gold mineralisation is locally concentrated in a breccia zone. The gold deposit is closely associated with a NNE-SSW trending fracture system that forms tensional open fractures. These tensional zones are thought to be directly related to the Sagiang transfer fault system that experienced several hundred kilometres of northward dextral movement during the post-Upper Miocene. Major sulfide minerals are pyrite and arsenopyrite with minor galena, chalcopyrite and sphalerite. Gold mineralisation is associated with intense silicification, sericitisation and argillic alteration. Primary Type I fluid inclusions in the quartz from the mineralised zone are five to 15 ìm across and yield homogenisation temperatures of 239° - 310°C and salinities of 1.2 - 10.9 wt per cent NaCl equivalent. Laser Raman spectroscopic analysis indicates the presence of CO_2 and CH_4 in Type II fluid inclusions. Sulfur isotope analysis of disseminated pyrite in the ore zone by the laser ablation method indicates ?~(34)S values from -5.48‰ to +5.53‰. The geology, alteration, ore mineralogy, fluid inclusion microthermometry and sulfur isotope data of the Kyaukpahto deposit are consistent with an epithermal ore deposit model for the deposit.
机译：Kyaukpahto金矿床位于缅甸张明科，缅甸张明师区的纬度23°47'55“和经度95°56'5”e。金矿化载于雄性形成（eocene）的砂岩，并作为库存和传播。高档金矿化局部集中在Breccia区。金矿床与NNE-SSW趋势骨折系统密切相关，这些裂缝骨折系统形成张力开裂骨折。这些张力区被认为直接与山地传输故障系统相关，在上部后新世纪经历了数百公里的向北右侧运动。主要的硫化物矿物质是黄铁矿和亚苯甲酸甲磺酸盐，含有轻微的伽罗培，黄铜矿和蝎石。金矿化与强烈的硅化，血清动脉和粒状改变有关。从矿化区的石英中的初级I型流体夹杂物横跨5至15μm，产量均化温度为239° - 310℃，盐度为1.2-10.9wt％NaCl当量。激光拉曼光谱分析表明II型流体夹杂物中的CO_2和CH_4的存在。通过激光烧蚀方法在矿石区中散列硫铁矿的硫同位素分析表明〜（34）的值从-5.48‰到+ 5.53‰。 Kyaukpahto沉积物的地质，改变，矿石矿物学，液体包裹物微米测定和硫同位素数据与沉积物的膜质矿床沉积模型一致。

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    《Pacific Rim Congress》|2008年||共8页
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    K Zaw;

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