N(2)-rich fluid in the vein-type Yangjingou scheelite deposit, Yanbian, NE China.
N(2)-rich fluid in the vein-type Yangjingou scheelite deposit, Yanbian, NE China.
复制标题
DOI：
10.1038/s41598-018-22227-7
复制
发表时间：
2018-04-04
影响因子：
4.6
通讯作者：
Konare Y
中科院分区：
文献类型：
--
作者：
Wang Y;Wang K;Konare Y
在中国东北延边地区羊金沟白钨矿床的钨矿化石英脉中发现了接近纯的 N2 流体包裹体（Th（L） = −151~−168 °C；Th（V） = ~150.3 °C）。其他流体包裹体群包括N2-CO2、NaCl-H2O ± N2 和CO2 ± N2-NaCl-H2O，但未检测到碳氢化合物。围岩属五道沟群变质岩系，主要由富钙云母片岩组成。次面状硫化物矿物赋存于早期浸染状钨矿化石英脉中，或部分取代了早期白钨矿。 ThN2和ThN2-H2O表示315℃至410℃和80MPa至350MPa的N2流体捕集。氧和氢同位素数据（δD = −74.9‰~−77‰，δ18O = 9.6‰~12‰，V-SMOW）表明成矿流体由岩浆水和变质水混合组成，富N2包裹体（δ15N = −0.5‰至1.4‰）表明流体-岩石与变质岩的相互作用岩石。富N2流体与白钨矿沉淀密切相关。在高氧逸度条件下的热分解过程中，与变质作用和岩浆活动同步发生，NH4+-云母中释放出大量的N2，然后在石英白钨矿脉的母液中积累。
Nearly pure N2 fluid inclusions (Th (L) = −151~−168 °C; Th (V) = ~150.3 °C) were identified in W-mineralized quartz veins from the Yangjingou scheelite deposit, in the eastern Yanbian area, NE China. Other fluid inclusion populations include N2-CO2, NaCl-H2O ± N2 and CO2 ± N2-NaCl-H2O, but no hydrocarbons were detected. The host rocks are part of the Wudaogou Group metamorphic series, which mainly consist of Ca-rich mica schist. Subhedral sulfide minerals occur in early disseminated W-mineralized quartz veins, or have partially replaced early scheelite. ThN2 and ThN2-H2O indicate N2 fluid-trapping from 315 °C to 410 °C and from 80 MPa to 350 MPa. Oxygen and hydrogen isotopic data (δD = −74.9‰~−77‰, δ18O = 9.6‰~12‰, V-SMOW) suggest that the mineralizing fluids were composed of mixed magmatic and metamorphic water, N2-rich inclusions (δ15N = −0.5‰ to 1.4‰) indicate fluid-rock interaction with metamorphic rocks. The N2-rich fluid was closely associated with scheelite precipitation. During thermal decomposition under high oxygen fugacity conditions, which occurred synchronously with metamorphism and magmatic activity, large amounts of N2 were liberated from NH4+-micas, which then accumulated in the parent fluid of the quartz scheelite veins.
登录
查看更多内容
影响因子：
3.9
作者：
Bohlke, JK;Ericksen, GE;Revesz, K
通讯作者：
Revesz, K
影响因子：
3.9
作者：
Ague, Jay J.
通讯作者：
Ague, Jay J.
延边东部五道沟群二叠纪时代：碎屑锆石U-Pb对中国东北古亚洲洋闭合的制约
影响因子：
2.6
作者：
Chen, Cong;Ren, Yun-Sheng;Hu, Zhao-Chu
通讯作者：
Hu, Zhao-Chu
影响因子：
4.8
作者：
Dewaele, S.;De Clercq, F.;Muchez, Ph.
通讯作者：
Muchez, Ph.
DOI：
10.3406/bulmi.1987.7985
发表时间：
1987-01-01
期刊：
BULLETIN DE MINERALOGIE
影响因子：
--
作者：
DUBESSY, J;RAMBOZ, C;WEISBROD, A
通讯作者：
WEISBROD, A