Acid gas and metal emission rates during long-lived basalt degassing at Stromboli volcano
Acid gas and metal emission rates during long-lived basalt degassing at Stromboli volcano
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DOI：
10.1029/1999gl008413
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发表时间：
2000-04-15
影响因子：
5.2
通讯作者：
Dongarrà, G
中科院分区：
文献类型：
--
作者：
Allard, P;Aiuppa, A;Dongarrà, G
斯特龙博利的酸性气体和金属排放量是通过对火山羽流中的颗粒物质进行空中和地面过滤取样，并结合COSPEC对SO2通量的测量确定的。较小的颗粒尺寸和高富集因子将最易挥发的元素（按顺序为：S、Se、Br、Cl、Cd、Bi、In、As、Sb、Sn、F、Au、Pb、Cr、Cu）与严格来自火山灰的元素（Fe、Mn、REE、Sc、Sr、Th、Ti、V）或主要来自火山灰的元素（Al、Ba、Ca、Co、K、Na、U）区分开来。时间平均挥发物通量显示，斯特龙博利火山是一个代表性的火山排放源，产生了全球火山硫、卤素和多种微量金属预算的1-2%，而意大利南部火山排放的Bi、Cd、Cs、Pb和Sn则占15-25%。在过去2ky的类似活动中，其富含S-Cl的钾玄质岩浆的亚低温脱气可能释放了与岩浆衍生的高硫化矿床中所遇到的一样多的铜和金。
The discharge of acid gases and metals from Stromboli is determined from airborne and ground-based filter sampling of particulate matter in the volcanic plume, combined with COSPEC measurements of SO2 fluxes. Smaller particle sizes and high enrichment factors distinguish the most volatile elements (by order: S, Se, Br, Cl, Cd, Bi, In, As, Sb, Sn, F, Au, Pb, Cr, Cu) from those strictly (Fe, Mn, REE, Sc, Sr, Th, Ti, V) or mainly (Al, Ba, Ca, Co, K, Na, U) derived from volcanic ash. Time-averaged volatile fluxes show that Stromboli is a representative are emitter, producing 1-2% of the global volcanic budget of sulfur, halogens and several trace metals, while 15-25% of volcanic emissions of Bi, Cd, Cs, Pb and Sn in southern Italy. Subaerial degassing of its S-Cl-rich shoshonitic magma over the last 2 ky of similar activity may have released as much copper and gold as is encountered in magma-derived high-sulfidation ore deposits.