Hydrothermal Aluminum-Phosphate-Sulfates in Ash from the 2014 Hydrothermal Eruption at Ontake Volcano, Central Honshu, Japan
Round 1
Reviewer 1 Report
Manuscript: minerals-557713
Page 2, line 55. APS were detected also at contact between igneous rocks and argilitic country-rocks. Please address this occurrence. Info are in
1-F. Stoppa, F. Scordari, E. Mesto, V.V. Sharygin, G. Bortolozzi (2010) Calcium-aluminum-silicate-hydrate “cement” phases and rare Ca-zeolite association at Colle Fabbri, Central Italy. Open Geosciences 2(2):175-187.
· 2- F. Stoppa, M. Schiazza (2013) Extreme chemical conditions of crystallisation of Umbrian Melilitolites and wealth of rare, late stage/hydrothermal minerals. Cent. Eur. J. Geosci, 6(4) • 2014 • 549-564. DOI: 10.2478/s13533-012-0190-zl
Page 2, lines 62-64. I am not clear about this assumption and the sudden jump from filed scale evidences to geodynamic setting. I suggest avoiding that. Not clear why a local scale phenomena may be related to subduction. I suggest to avoid that.
Page 2 line 82. Phreatic eruptions, please make sure it is just magmatic heat plus water, and not phreatomagmatic eruption which is magma plus water.
Figurte 1. Figure b and c are not very informative, figure a is nice but do not show any geological aspect (rock composition, type of rocks (lavas and pyroclastic). I would prefer a geological map, but considering the sampling site I think that figure 1 is not necessary or have to be improved. A thicker accumulation is may be available near vent. Do you have any picture of thicker, 2014 eruption related deposits (I mean still in situ) ?
Please check the use of argillic vs argillitic all over the text
Other comment are in the marked text.
Author Response
Dear Reviewer 1,
We appreciate all of your essential comments for our manuscript. Thank you for your revision.
We listed the response for your comments in the attached PDF. Primarily, your third comment about phreatic eruption should be carefully and deeply treated for our manuscript. For this comment, we use the term ‘hydrothermal eruption’ (Browne and Lawless, 2001) to replace ‘phreatic eruption’ in this text. To use this term clearly shows that the 2014 eruption was not phreatomagmatic, and it was derived from the subvolcanic hydrothermal system. The details for the other comments are also explained in the attached PDF. Please find the attached again.
Thank you in advance.
Sincerely yours,
Imura
Author Response File: 
Author Response.pdf
Reviewer 2 Report
This is an interesting, carefully written, and concise paper. I have annotated some minor suggestions onto the attached pdf. The only other suggestion I'd make would be to include some sort of cartoon cross section or diagram showing the relative depth and location of the magmatic and hydrothermal systems, and the various alteration zones. I don't mean something geophysically accurate, just something to help readers visualize the magmatic-hydrothermal system you discuss--a picture is worth a thousand words! The process of generating and incorporating a figure like this might also help you flesh out your discussion with a few more specific insights about subvolcanic hydrothermal architecture than might be gleaned from this study.
But, in general, I found this a neatly written and scientifically engaging paper, and will recommend it for publication.
Comments for author File: Comments.pdf
Author Response
Dear Reviewer 2,
We appreciate all of your essential comments for our manuscript. Thank you for your revision.
The response to your comments was listed in the attached PDF. Especially, we tried to illustrate the relative depth and location of the magmatic and hydrothermal systems and the various alteration zones. This was performed in Figure 8. Please find the attached PDF and Figure 8 in the revised manuscript.
Thank you in advance.
Sincerely yours,
Imura
Author Response File: Author Response.pdf
