Magmatic-Hydrothermal Fluid Processes of the Sn-W Granites in the Maniema Province of the Kibara Belt (KIB), Democratic Republic of Congo

Round 1

Reviewer 1 Report

The paper contains great and important geological, geochemical and mineralogical data on Sn-W granites from Maniema Province of KIB on Congo. I think, I do not have any comments about these sections of the paper. 

About fluid inclusion study:

1) What type/or types of inclusions were examined - primary, pseudosecondary or secondary in each of minerals?

2) Are there any information about the melt inclusions?

3) Could you give the reference for the pressure and depth calculation method used in the paper?

4) What are the wide salinity ranged in fluids? Only with mixing of magmatic fluids ang meteoric water?

5) How many fluid inclusions were examined with Raman spectrometry?

6) Table 5 is too bulky and difficult to consider (too much numbers). May be you should try to reduce it.

 

Author Response

Reviewer #1

 

Most of the reviewer's suggestions were adopted, and the manuscript's English was polished following the required revisions. The revised part of the manuscript is now highlighted.

 

black texts: reviewer’s questions.

Blue texts: Author’s answers.

orange texts: line numbering in the submitted manuscript version.

 

Q1) What type/or types of inclusions were examined - primary, pseudo secondary or secondary in each of minerals?

 

A1) For analyses, we used pseudo secondary and primary fluid inclusions for cassiterite, and pseudo secondary fluid inclusions for quartz and fluorite (Please refer to lines 350-369).

 

Q2) Are there any information about the melt inclusions?

 

A2) We have no information related to melt inclusions.

 

Q3) Could you give the reference for the pressure and depth calculation method used in the paper?

 

A3) The following are references used to estimate pressure-depths based on fluid inclusion data:

 

1. Seo, J.H. et al., 2017. Magmatic–hydrothermal processes in Sangdong W–Mo deposit, Korea: Study of fluid inclusions and 39Ar–40Ar geochronology. Ore Geology Reviews, 91: 316-334. (See the figure 11, page 331).
2. Chi, G., Diamond, L.W., Lu, H., Lai, J., Chu, H., 2020. Common Problems and Pitfalls in Fluid Inclusion Study: A Review and Discussion. Minerals, 11(1): 1-23. (See the section 5.3., figure 8., page 17)

 

Additional references are:

1. Bakker, R.J., 2018. AqSo_NaCl: Computer program to calculate PTVx properties in the H₂O-NaCl fluid system applied to fluid inclusion research and pore fluid calculation. Computers & geosciences, 115: 122-133.

 

2. Steele-MacInnis, M., Lecumberri-Sanchez, P., Bodnar, R.J., 2012. Hokieflincs_H2O-NaCl: A Microsoft Excel spreadsheet for interpreting microthermometric data from fluid inclusions based on the PVTX properties of H₂O-NaCl. Computers & Geosciences, 49: 334-337.

 

3. Mernagh, T.P., Leys, C., Henley, R.W., 2020. Fluid inclusion systematics in porphyry copper deposits: The super-giant Grasberg deposit, Indonesia, as a case study. Ore Geology Reviews, 123: 103570. (See the section 3.2., page 9).

 

4. Lecumberri-Sanchez, P., Steele-MacInnis, M., Bodnar, R.J., 2012. A numerical model to estimate trapping conditions of fluid inclusions that homogenize by halite disappearance. Geochimica et Cosmochimica Acta, 92: 14-22.

 

5. Lecumberri-Sanchez, P., Steele-MacInnis, M., Bodnar, R.J., 2015. Synthetic fluid inclusions XIX. Experimental determination of the vapor-saturated liquidus of the system H₂O-NaCl-FeCl₂. Geochimica Et Cosmochimica Acta, 148: 34-49.

 

6. Cathelineau, M., Izquierdo, G., Nieva, D., 1989. Thermobarometry of hydrothermal alteration in the Los Azufres geothermal system (Michoacan, Mexico): Significance of fluid-inclusion data. Chemical geology, 76 (3-4): 229-238.

 

Comments: Based on fluid inclusion data where pressure (P) and temperature (T) are obtained, and assuming a density (D) of 2.7 (crustal lithosphere) or 1 (aqueous fluids) , we can estimate the depth [d (km)= (P (kbar)/ D*9.8)*100]  for the lithostatic and hydrostatic regimes. Hower, there are limitations related to (1) the perturbations of pressures in natural systems by the re-opening of fractures or faults (Chi et al., 2020), (2) the behavior changes of stresses as of stress ratio (k-factor =σ_h/ σ_v) of horizontal by vertical at shallow, moderate and deep zones, and whether we are in hydrostatic or lithostatic regimes (Mernagh et al., 2020; Chi et al., 2020).

In many cases, and in this study, estimated values of paleodepths by fluid inclusions data are preferentially relying on boiling assemblages.

 

Q4) What are the wide salinity ranged in fluids? Only with mixing of magmatic fluids and meteoric water?

 

A4) Salinity of fluids ranged from 1 to 23 wt.% NaCl equivalent (Please refer to lines 32-35, and table 5). There are other possibilities of mixing with fluids of metamorphic origin (Van Daele et al., 2018, figure 5; Myint et al., 2018, figure 12) but in this study, we did not analyze stable isotopes (O, H) in order to consistently support the above scenario of metamorphic fluids. Nevertheless, we raised questions in this study of possible sources of fluids based on Raman analyses of fluid inclusions, and where the presence of nitrogen (N₂) which is abundant in the atmosphere, and the the methane gas (CH₄) could originated from both meteoric and metamorphic fluids. Thus, we suggested in this study, the possibly fluid mixings of magmatic and meteoric (and/or metamorphic) origins. 

 

Q5) How many fluid inclusions were examined with Raman spectrometry?

 

A5) We initially examined 60 fluid inclusions under the Raman spectrometry where about 40 inclusions provided good results with well expressed peaks of contained gas species (Please refer to lines 280-288).

 

Q6) Table 5 is too bulky and difficult to consider (too much numbers). Maybe you should try to reduce it.

 

A7) We sincerely thank the reviewer for the pertinent suggestion, we revised it as recommended.

Author Response File: Author Response.pdf

Reviewer 2 Report

This paper deals with the fluid inclusions and mineral chemistry of Sn-W deposits from Maniema Province of the Kibara Belt (KIB), Democratic Republic of Congo, which is essentially interesting and important in the understanding of Sn-W ore systems. However, the current stage of the paper needs moderate revision. The main shortcomings concern data about the methodology, mineral chemistry, and vapor phases.

 Comments are as follows:

1. Detailed EPMA parameters, including standards and measurement conditions, are required to be added under the methodology session.

2. The authors determined the components of vapor phases of fluid inclusions by laser Raman study but they need to discuss more detail about the sources. The discussions neglect the magmatic derivatives, which are the major components of mineralization systems. E.g., CO₂ can be derived from the magmatic source since this mineralization system is genetically associated with magmatism (the authors likewise discussed that under the ore geochemistry session). Then, although the author described Sn-W mineral systems are genetically associated with post-tectonic (likely post-orogenic) magmatic events, they interpreted some vapor components in the ore fluids were derived from the metamorphic origin. The authors need to explain why they interpret them as metamorphic derivatives.

In addition, the authors continue to discuss the redox fluctuation of the ore fluid from the magmatic to magmatic-hydrothermal relying on the CO₂/CH₄ ratios. However, the generalized explanation of the redox state (such as reduced or oxidized) and its intensity is lacking in the discussion.

3. Regarding the in situ mineral chemistry, the authors should explain why the contents of REES in the hydrothermal minerals (cassiterite and wolframite) are very low and under detection limits. The authors should consider not only the ore fluid sources but also the hostrock geochemistry (i.e., fluid-rock interaction) and other variables (such as temperature and pressure variations) to discuss the trace element geochemistry of the hydrothermal minerals. Then, although the interpretation of the REE patterns is not very productive in your case, some trace element ratios (e.g., Y/Ho, Zr/Hf, Rb/Sr) can be used to improve the discussion.

Specific comments are in the attached file.

 

 

 

Comments for author File: Comments.pdf

Author Response

Reviewer #2

 

Most of the reviewer's suggestions were adopted, and the manuscript's English was polished following the required revisions. The revised part of the manuscript is now highlighted.

 

black texts: reviewer’s comments, suggestions and questions.

Blue texts: Author’s answers, comments and explanations.

Red texts: line numbering in the corrected manuscript.

 

Reviewer questions and comments -Author reactions:

 

1. Detailed EPMA parameters, including standards and measurement conditions, are required to be added under the methodology session.

We agree with your suggestion, missing details have been added accordingly (see line 247-261).

 

2. The authors determined the components of vapor phases of fluid inclusions by laser Raman study but they need to discuss more detail about the sources. The discussions neglect the magmatic derivatives, which are the major components of mineralization systems. E.g., CO₂ can be derived from the magmatic source since this mineralization system is genetically associated with magmatism (the authors likewise discussed that under the ore geochemistry session). Then, although the author described Sn-W mineral systems are genetically associated with post-tectonic (likely post-orogenic) magmatic events, they interpreted some vapor components in the ore fluids were derived from the metamorphic origin. The authors need to explain why they interpret them as metamorphic derivatives.

For detected gas species under the Raman, the main source of CO₂ (and others) is magmatic-derived. However, we noticed in the result, the presence of nitrogen (N₂) which main reservoir is in the atmosphere; and therefore, we raised the possibly of fluid mixings of magmatic and meteoric (and/or metamorphic) origins in the discussion section (See also Van Daele et al., 2018, Pohl and Gunther, 1991; Pohl et al., 2013). Basically, the source of fluids can be determined by several methods including fluid inclusion data (as shown in this study), stable isotope (O, H) data (Van Daele et al., 2018, figure 5; Myint et al., 2018, figure 12; Hulsbosch et al., 2016). Few studies in the Kibara belt showed that intense fluid–host rock interactions controlled the scheelite-wolframite precipitation during vein formation and this alteration overprinted the fluid composition, causing a change in the gaseous composition (6-44 mol% N₂ and 5-10 mol% CH₄). Moreover, the quartz stable isotope record, showing δ¹⁸O_quartz values of +14.4‰ to +15.6‰ V-SMOW and δD _quartz values of -33‰ to -64‰ V-SMOW, would be favorable to a dominant ‘‘metamorphic” signature of the mineralizing fluid, causing intense fluid-metapelite host rock interactions (Hulsbosch et al., 2016; Van Daele et al., 2018). Unfortunately, we did not analyze stable isotopes in this study. Our argument about the possible metamorphic fluid involment on the basis of vapor phase component can be supported by stable isotope data of the aforementioned studies in the Kibara belt.

 

We agree with the reviewer that the studied granites are post-tectonic. The Kibara belt Sn-W mineral systems being genetically associated with the Kibaran post-tectonic (likely post-orogenic) magmatic events, and details about ages of deformation, metamorphism and magmatism have been largely discussed in studies including:

1. Debruyne et al., 2015. Regional geodynamic context for the Mesoproterozoic Kibara Belt (KIB) and the Karagwe-Ankole Belt: Evidence from geochemistry and isotopes in the KIB. Precambrian Research, 264: 82-97.
2. Dewaele et al., 2015. Geological setting and timing of the cassiterite vein type mineralization of the Kalima area (Maniema, Democratic Republic of Congo). Journal of African Earth Sciences, 112: 199-212.
3. Dewaele, S. et al., 2016. Geological setting and timing of the world-class Sn, Nb-Ta and Li mineralization of Manono-Kitotolo (Katanga, Democratic Republic of Congo). Ore Geology Reviews, 72: 373-390.
4. Johnson et al., 2005. A review of the Mesoproterozoic to early Paleozoic magmatic and tectonothermal history of south–central Africa: implications for Rodinia and Gondwana. Journal of the Geological Society, 162: 433–450.
5. Kokonyangi et al., 2005. Petrology and geochronology of Mesoproterozoic mafic-intermediate plutonic rocks from Mitwaba (D. R. Congo): implications for the evolution of the Kibaran belt in central Africa. Geological Magazine, 142(1): 109-130.
6. Kokonyangi et al., 2006. The Mesoproterozoic Kibaride belt (Katanga, SE DR Congo). Journal of African Earth Sciences, 46(1-2): 1-35.
7. Tack and Bowden, 1999. Post-collisional granite magmatism in the central Damaran (Pan-African) Orogenic Belt, western Namibia. Journal of African Earth Sciences, 28(3): 653-674.
8. Tack et al., 2010. The 1375Ma “Kibaran event” in Central Africa: Prominent emplacement of bimodal magmatism under extensional regime. Precambrian Research, 180(1-2): 63-84.
9. Van Daele et al, 2020. Metamorphic and metasomatic evolution of Western Domain of the Karagwe-Ankole Belt (Central Africa). Journal of African Earth Sciences, 165: 1-20.
10. Van Daele et al., 2021. Integrative structural study of the Kibuye-Gitarama-Gatumba area (West Rwanda): A contribution to reconstruct the Meso- and Neoproterozoic tectonic framework of the Karagwe-Ankole Belt. Precambrian Research, 353.
11. Villeneuve, M. et al., 2019. U-Pb ages and provenance of detrital zircon from metasedimentary rocks of the Nya-Ngezie and Bugarama groups (D.R. Congo): A key for the evolution of the Mesoproterozoic Kibaran-Burundian Orogen in Central Africa. Precambrian Research, 328: 81-98.

 

In this study, a summary of geological information on the study area by including the Kibara belt chronostratigraphic units and syn- to post-orogenic magmatic events is provided in the figure 3 in page 5. If the necessary, please refer to the above cited references for further details.

 

In addition, the authors continue to discuss the redox fluctuation of the ore fluid from the magmatic to magmatic-hydrothermal relying on the CO₂/CH₄ ratios. However, the generalized explanation of the redox state (such as reduced or oxidized) and its intensity is lacking in the discussion.

We agree with the reviewer about the lacking of CO₂/CH₄ ratios in the discussion. We added more discussion in the corrected manuscript at line 584-599.

 

3. Regarding the in situ mineral chemistry, the authors should explain why the contents of REES in the hydrothermal minerals (cassiterite and wolframite) are very low and under detection limits. The authors should consider not only the ore fluid sources but also the host rock geochemistry (i.e., fluid-rock interaction) and other variables (such as temperature and pressure variations) to discuss the trace element geochemistry of the hydrothermal minerals. Then, although the interpretation of the REE patterns is not very productive in your case, some trace element ratios (e.g., Y/Ho, Zr/Hf, Rb/Sr) can be used to improve the discussion.

To the question of explaining why REEs in the hydrothermal minerals (cassiterite and wolframite) are very low and even under detection limits, we think that the reviewer’s remarks are right and informative; however, we would prefer not embracing it in this study because it has been discussed in other papers. We did and would focus only on some detectable REEs such as Ce which is sensitive to oxidation-reduction status. Nevertheless, here are some important explanations to above addressed questions:

 

(1) REEs being weak chalcophilic tendencies (Morgan and Wandless, 1980), and in hydrothermal environment involving a possible mixing of fluids, fluid-rock (metasediment) interactions (Zhang et al., 2022; Lecumberri-Sanchez et al., 2017; Myint et al., 2018), REEs are amply discharged from the mineralizing fluids (Falcone et al., 2022). They can form REE economic deposits as hydrothermal veins (Myint et al., 2018), and this can explain the presence of REE deposits in the Kibara belt resources.

 

(2) REEs complexation is also influenced by the thermodynamic (favorable to relatively low temperature and pressure) and chemical (low pH limits REE complexations) conditions of deposition (Falcone et al., 2022). The mixing of fluids (magmatic-meteoric) leads to the oxidization and increase the pH, allows REE complexation and transportation to nearest host-rock (sediment); and this process contribute on depleting hydrothermal minerals that precipitate in such environment.

 

In conclusion, fluid-rock interactions, physico-chemical conditions of the receptacle environment, and the lithologic controls are the key-processes that control the enrichment or the depletion of major and trace elements including REE.

 

In this study, we briefly pinpointed and discussed the roles of alteration, fluid-rock interactions, mixing of fluids, and lithologic control during the precipitation of hydrothermal minerals including cassiterite and wolframite.

 

The use of trace ratios such as Y/Ho (REE scarcity of data) was inconsistent. For ratios of Zr/Hf and Rb/Sr, these traces (Hf, Rb, Sr) were also in very small amounts closely or even under detection limits. Zr alone was discussed at 486-493. The above ratios could be informative in the case of silicate minerals such as muscovite (biotite) in granite, greisen, quartz veins or metasediment; however, we could not analyze muscovite. Instead, few relevant ratios are used and discussed in this study such as V/Fe, Ti/Fe, In/Ta, Al/Nb at 480-485.

 

 

Corrections of specific comments in the attached file.

 

1] Greisenization?

We agree with the reviewer because some granites have been greisenized, and the written mineral association is typical of greisen. The greisenization is discussed in the main text in the petrography section 2.3 and in result section. We would prefer to dissimulate it in the abstract section.

 

2] FIAs in the quartz veins show salinities of 1–23 wt.% and Th of 130–350 ºC.

This is the result of fluid inclusion microthermometries for quartz host in veins. We removed the sentence in the abstract, and results of quartz vein fluid inclusions are inserted.

 

3] Need to add Th and salinities of them…

We added Th and salinities.

 

4] The Kibara belt (KIB) in the …the spell out of…DRC contains

 We have deleted and written the spell out of DRC as suggested.

 

5] What do you mean? Leucocratic? Aplogranite? Need to add an adjective form here.

 Leucogranite is an acronym or shorten form of leucocratic granite. We added “leucocratic granite” as suggested by the reviewer.

 

6] associated mineralization?

We agree with the reviewer and corrections have been made accordingly.

 

7] post-orogenic? Need to describe more about the tectonic events here. According the geochronological data, you can describe them as successive magmatic events.

We agree with the reviewer about the term “post-orogenic” instead of post-tectonic.

We appreciate the comments and suggestions on adding more descriptions about tectonic events. However, we would appreciate if the reviewer accepts to keep a few descriptions of the tectonic events in the text, and refers to furnished and summarized details on the figure 3 of this study where requested elements of information are provided. If the necessary, please refer to the above 11 citations (references) in the reviewer and comments section of this answer sheet at question 2, where they have extensively and clearly discussed the chronostratigraphic and tectono-magmatic issues with more details.

 

8] I would suggest you should separate it from the granites.

“…(4)lenticular injected and pipes of aplite-like granites…”are cited for informative purposes but we did not focus on them, if separated from granites, we need to provide more details which we do not have. We would keep them listed because they are part of a generic and broader family of granites found in the study area.

 

9] …display…(grammatical correction).

We agree with the reviewer and “s” have been added.

10] …? (The sentence)

We agree with the reviewer suggestion, and the sentence was rephrased and corrected as following: …” equigranular granitic intrusions occurred often in small satellite apophyse-like cupola body. big batholith bodies, approximately long of 4 to 7 km and large of 1 to 2 km”…

 

11] Fig. (4i) is not included. I think it is the photo of outcrop.

We have corrected as following:

… Representative field and rock sample photo macrographs Macrophotographs of representative rock samples from the KIB in…

 

12] Should give the mineral species name of amphibole under microscope.

The name of the amphibole is hornblende, and we revised.

…and amphibole hornblende…

 

13] Schorl?

We did not get the chemical composition, but based on the color (black) of the mineral, it can be a schorl tourmaline, and we agree with the reviewer suggestion.

…of black tourmaline (schorl)…

 

14] Use the term “minerals” instead of “sulfides”

We corrected as suggested.

… supergene minerals sulfides such as chalcocite, covellite, and carbonate hydroxide minerals such as malachite.

 

15] need to rephrase.

We rephrased as suggested.

…occur as lenticular or pipe-like bodies of which diameter less than 50 m of diameter…

 

16] Scheelite is not a sulfide

We revised as suggested.

… sulfides including arsenopyrite, pyrite, scheelite, and…

 

17] Analytical parameters and conditions of EPMA is still needed to describe under this session.

Details on the EPMA methodology have been added at the methods section:

…, the electron probe microscope consisted of JEOL- JXA-8530F PLUS model, and used an acceleration voltage of 15 kV, an acceleration current of 40 nA, and an electron beam of 3 mm. The analysis was conducted with a peak duration of 10s and a background time of 5s for Ti, Fe and Mn, and both peak and background times of 40 s for remained elements. Elements were measured on cassiterite (Sn, PET (2d=8.7Å), Lα), rutile (Ti, PET, Kα), hematite (Fe, LIF (2d=4.0 Å), Kα), spessartine garnet (Mn, LIF, Kα), corundum (Al, TAP (2d=25.8 Å), Kα), columbite (Nb, LIF, Lα), tantalite (Ta, TAP, Mβ), and wolframite (Mn, TAP, Lα). For the calibrations, standards are natural minerals: cassiterite for Sn, synthetic oxides: MnTiO₃ for Ti and Fe₂O₃ for Fe, and pure metals (Nb, Ta and W)…

 

18] Width?

We agree with the reviewer suggestion. It is the width (or in extension the thickness) of bands, and the term “width” was added.

… of less than 50 μm of width.

 

19] add “ies” and check the sentence grammatically.

We agree with the reviewer, corrections were made.

…anomalies values (Ce N/Ce*N). Wolframite displayed both Ce positive and negatively anomalies as well…

 

20] Need to clarify the sentences here. I would suggest to order minerals or host types clearly.

The reviewer suggestions are pertinent. Fluid inclusions were measured in three minerals including quartz, fluorite and cassiterite. In the sentences, we provide first the FI host mineral and the host rock. We have rephrased the sentences and made corrections accordingly.

…selected host minerals and their FIs as follow: (a) quartz in the barren granites (DMBAR-1, DMKAILO-1, and BALE-1, Fig. 2), (b) quartz in the Sn-bearing granites (DMMOKA-2, DMMOKA-2-6, DMMOKA-2-4, DMMOKA-2-7, DMMOKA-2-8, DMMOGA-1, and DMNAKE-1, Fig. 2), (c) quartz in barren quartz veins that crosscut in Sn granite (DMMOKA-2-7 and DMMOKA-2-8, Fig. 2), (d) quartz in Sn-W quartz veins crosscutting in metasedimentary rocks (e.g., Schist, DMYUB-1, DMMET-1, DMBAT-1, and DMNAKE-1, Fig. 2, 5c-g), (e) fluorite in barren quartz veins that crosscut hosted in the Sn mineralized granite (DMMOKA-2-8, Fig. 2, 5a-b), and (f) cassiterite hosted in mineralized quartz veins and granites (DMYUB-1, DMMAKU-1, DMBAT-1, and DMNAKE-1, Fig. 4g-h, 5c-g; Table 5)…

 

21] Photomicrographs??? (Instead of photographs)

We corrected as suggested.

 …Representative photomicrographs of KIB…

 

22] Spell out of “FI”

We corrected.

…4.4. Fluid Inclusion FI Microthermometry and…

 

23] backspace

We corrected. In addition, the world “calculated” was corrected to “calculated”.

…measurements of  the boiling…corrected to …measurements of the boiling…

 

24] Greisenization?

We think that it would be better to keep the term “alteration (greisenization or muscovitization, tourmalization, albitization, etc.)” which is a generic and inclusive term in this case of the Kibara belt instead of the exclusive term “greisenization”.

 

25] need to discuss more detail about the sources. CO₂ can be derived from the magmatic since this mineralization system is genetically associated with the magmatism.

specific details and precisions are provided the revised version of the manuscript.

 

Comments: Based on the result of fluid inclusions, we totally agree that fluids are magmatic-derived or magmatic dominant since the mineralization is associated with the post-orogenic magmatism. The main source of CO₂ (and others) is of magmatic origin. However, we noticed in the Raman result, the presence of nitrogen (N₂) which is abundant in the atmosphere; and therefore, we raised the possibly of fluid mixings of magmatic and meteoric (and/or metamorphic) origins in the discussion section (See also Van Daele et al., 2018, Pohl and Gunther, 1991; Pohl et al., 2013). Basically, the source of fluids can be determined by several methods including fluid inclusion data (as shown in this study), stable isotope (O, H) data (Van Daele et al., 2018, figure 5; Myint et al., 2018, figure 12; Hulsbosch et al., 2016). The lack of stable isotope (H, O) result in this study is weakening arguments to support the scenario of the possibly presence of metamorphic-derived fluids.

 

26] How change (the oxidation states)?

We think that it changes from reduced state to oxidized state along with the fluid mixings, time flowing, fluid cooling and the ore precipitation continuing…!

We have no measured data of fO₂ and pH that might be been prevailing during Sn-W ore precipitations, and no way to argue accurately about oxidation states. However, the selective distributions of trace elements in ore minerals in accordance with ore textures, fluctuations of Ce anomalies and CO₂/CH₄ ratios, and fluid inclusion data provides sufficient hints on a possibly the fluctuation of oxidation states. We think that this is an interpretative statement restricted on obtained results, and can subject to discussions.

 

27] Vapor phase.

We made the correction.

… Raman spectroscopy on vapor phase bubble parts of the FIs…

 

28] I would suggest the authors to read and cite following papers, which can be productive for your interpretation.

We have read some of them such as Myint et al., 2018, and we found them very instructive and informative. We have difficulties to scroll down the provided reference list in the popup box. We would suggest to the reviewer to provide them by email of the corresponding author of this manuscript.

For the citation of the suggested references in this manuscript, we would request to the reviewer to accept the references to be thoroughly cited in the next article of the second (ongoing analyses) part of the study area where we will extensively discuss the petrochemical, metallogenic, isotopic (stable) and geochronologic (Zircon_SHRIMP, Muscovite (biotite)_K-Ar and Ar-Ar) issues of the Kibara belt granites and quartz veins. We think that there is an essential and legitimate need to read them carefully in order to extract a maximum of useful information because the correction time of the manuscript is limited to 5 days by the editorial desk office. Once again, we deeply thank the reviewer for all fruitful suggestions and comments. 

 

Author Response File: Author Response.pdf