Publication Date:
2017-04-04
Description:
The transport, degassing and atmospheric release of halogens from active volcanism on Earth have been the
12 focus of increasing interest over the last few decades, and have recently been the subject of the 1st workshop
13 on “Halogens in volcanic systems and their environmental impacts” that was held in December of 2007 at
14 Yosemite Lodge in Yosemite National Park, California. As an introduction to this Chemical Geology special
15 issue, collecting contributions from many of the participants at the workshop, we review here recent
16 advances in this field, including experimental and theoretical investigations of halogen behaviour in volcanic
17 and related magmatic systems. We discuss previous research on several aspects of halogen geochemistry,
18 including halogen abundances in the mantle and magmas on Earth; the effects of halogens on phase
19 equilibria and melt viscosities; their partitioning between melt and fluid phase(s) upon decompression,
20 cooling and crystallisation of magmas in the
^
Earth's crust; and their final atmospheric release as volcanic
21 gases. The role of halogens in the genesis of hydrothermal systems and in the transport of ore-forming metals
22 is also reviewed, and we discuss our current understanding of atmospheric processing of volcanic halogens in
23 both the troposphere and stratosphere, and their consequent impacts. In spite of these recent advancements,
24 our current understanding of halogen geochemistry at active volcanoes is still far too fragmentary, and the
25 key questions that require answers from future research are summarised in our conclusions.
Description:
PRIN 2008 and DPC-INGV
1381 2007-2009 grants;
NSERC Dis-
1382 covery grant;
NSF award EAR 0308866
Description:
In press
Description:
2.3. TTC - Laboratori di chimica e fisica delle rocce
Description:
JCR Journal
Description:
reserved
Keywords:
Halogens
;
Volcanic gas
;
Ore deposits
;
Atmospheric effects
;
04. Solid Earth::04.08. Volcanology::04.08.02. Experimental volcanism
Repository Name:
Istituto Nazionale di Geofisica e Vulcanologia (INGV)
Type:
article
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