Fluid Inclusion Microthermometry and Implications for the Mechanisms of Ore‐Grade Gold Mineralization in Epithermal System, Lalab Orebody, Sibutad, Zamboanga del Norte, Philippines
Fluid Inclusion Microthermometry and Implications for the Mechanisms of Ore‐Grade Gold Mineralization in Epithermal System, Lalab Orebody, Sibutad, Zamboanga del Norte, Philippines
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流体包裹体显微测温及其对浅成热液系统矿石级金矿化机制的影响，Lalab 矿体，Sibutad，北三宝颜，菲律宾
DOI：
10.1111/j.1751-3928.2007.00015.x
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发表时间：
2007
期刊：
影响因子：
1.4
通讯作者：
V. B. Maglambayan
中科院分区：
文献类型：
--
作者：
F. Jiménez;G. Yumul;V. B. Maglambayan
西布塔德金矿床的金与石英脉共生。其中最重要的是Lalab矿体，它含有矿石级金，主要存在于乳白色石英脉和细脉中。这里的蚀变石英和细晶透明乳状石英由三期热液形成，即I期、II期和III期。对I期乳状石英、II期细粒蚀变石英和III期乳状石英±重晶石脉状细脉进行了流体包裹体显微测温。均一温度(TH)为>；阶段I为248℃，阶段II为214~232℃，阶段III为186~239℃。这些流体包裹体的盐度为1~2wt%氯化钠当量。就金含量而言，一期钻芯样品含金量为0.53~0.76克/吨，二期样品含金量为1.12~3.70克/吨，三期含金量为9.06~23.88克/吨。这种相关性表明，金是从II期和III期流体中沉淀出来的。
The Sibutad gold deposit has gold associated in quartz veins. The most important of these is the Lalab orebody, which contains ore‐grade gold, predominantly, in milky quartz veins and veinlets. Here, alteration quartz and fine‐grained crystalline clear and milky quartz were formed from hydrothermal fluids in three stages, namely stages I, II and III. Fluid inclusion microthermometry was carried out on stage I milky quartz, stage II fine‐grained alteration quartz and stage III milky quartz ± barite veins and veinlets. Homogenization temperatures (TH) are >248°C in stage I, 214–232°C in stage II and 186–239°C in stage III. These fluid inclusions have salinity between 1 and 2 wt% NaCl equivalent. In terms of gold assay, stage I drill‐core samples have gold grades 0.53–0.76 g/ton Au, stage II samples have 1.12–3.70 g/ton Au and stage III samples have 9.06–23.88 g/ton Au. This correlation suggests that gold was precipitated from the stage II and III fluids.