Pub Date : 2026-02-05DOI: 10.1007/s00126-025-01426-z
Andreas G. Mueller
{"title":"Reply to the Discussion on “Granite-pegmatite-related gold skarns and associated Li-Cs-Ta pegmatites in the Archean Yilgarn Craton, Western Australia” by Witt (2025)","authors":"Andreas G. Mueller","doi":"10.1007/s00126-025-01426-z","DOIUrl":"https://doi.org/10.1007/s00126-025-01426-z","url":null,"abstract":"","PeriodicalId":18682,"journal":{"name":"Mineralium Deposita","volume":"59 1","pages":""},"PeriodicalIF":4.8,"publicationDate":"2026-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146138669","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-02-03DOI: 10.1007/s00126-025-01414-3
Stephanie Lohmeier, Bernd Lehmann, Andrew Hodgkin, Jan Pašava, Lukáš Ackerman, Ondřej Šebek, Alexandre Andronikov, Albrecht Schneider
The Valeriano composite epithermal-porphyry Cu‒Au system in the El Indio-Maricunga metallogenic belt, Vicuña segment, consists of a shallow silicic lithocap with low-grade Au‒Ag ± Cu mineralization underlain by a large porphyry-Cu (± Mo, ± Au) deposit. A deep drillhole (VALD-D13-14) allows the systematic evaluation of bulk-rock Cu‒Mo isotope compositions over a vertical extent of ~ 1,900 m through the hydrothermal porphyry-epithermal system. Copper isotope values in the lower 1,000 m of the mineralized potassic and phyllic altered porphyry zone increase slightly upwards in the range of +0.2 to +0.4‰, and scatter in the upper phyllic and advanced argillic zone (δ 65 Cu: ‒3.7‰ to +2.7‰). The near-surface low-Cu leached zone has very negative δ 65 Cu values down to ‒6.5‰ and there are also some distinctly negative excursions in the deep potassic zone with subordinate advanced argillic alteration. Molybdenum isotope values are slightly negative in the potassic porphyry zone (δ 98 Mo: ‒0.3 to ‒0.2‰), but increase over the phyllic zone to positive values of 0.2‒0.3‰, and strongly scatter at the transition to the high-sulfidation epithermal system. The Cu and Mo isotope patterns can be mainly attributed to Rayleigh fractionation between vapor and brine in the magmatic-hydrothermal porphyry system and to redox-controlled isotope shifts during supergene alteration in the epithermal system. Deviations from the general trend in some deep drillcore intercepts relate to short intervals of advanced argillic alteration and corresponding redox fluctuations with Cu enrichment.
{"title":"Copper and molybdenum isotope signatures along a vertical section through the Valeriano epithermal-porphyry Cu-Au system, El Indio-Maricunga belt, northern Chile","authors":"Stephanie Lohmeier, Bernd Lehmann, Andrew Hodgkin, Jan Pašava, Lukáš Ackerman, Ondřej Šebek, Alexandre Andronikov, Albrecht Schneider","doi":"10.1007/s00126-025-01414-3","DOIUrl":"https://doi.org/10.1007/s00126-025-01414-3","url":null,"abstract":"The Valeriano composite epithermal-porphyry Cu‒Au system in the El Indio-Maricunga metallogenic belt, Vicuña segment, consists of a shallow silicic lithocap with low-grade Au‒Ag ± Cu mineralization underlain by a large porphyry-Cu (± Mo, ± Au) deposit. A deep drillhole (VALD-D13-14) allows the systematic evaluation of bulk-rock Cu‒Mo isotope compositions over a vertical extent of ~ 1,900 m through the hydrothermal porphyry-epithermal system. Copper isotope values in the lower 1,000 m of the mineralized potassic and phyllic altered porphyry zone increase slightly upwards in the range of +0.2 to +0.4‰, and scatter in the upper phyllic and advanced argillic zone (δ <jats:sup>65</jats:sup> Cu: ‒3.7‰ to +2.7‰). The near-surface low-Cu leached zone has very negative δ <jats:sup>65</jats:sup> Cu values down to ‒6.5‰ and there are also some distinctly negative excursions in the deep potassic zone with subordinate advanced argillic alteration. Molybdenum isotope values are slightly negative in the potassic porphyry zone (δ <jats:sup>98</jats:sup> Mo: ‒0.3 to ‒0.2‰), but increase over the phyllic zone to positive values of 0.2‒0.3‰, and strongly scatter at the transition to the high-sulfidation epithermal system. The Cu and Mo isotope patterns can be mainly attributed to Rayleigh fractionation between vapor and brine in the magmatic-hydrothermal porphyry system and to redox-controlled isotope shifts during supergene alteration in the epithermal system. Deviations from the general trend in some deep drillcore intercepts relate to short intervals of advanced argillic alteration and corresponding redox fluctuations with Cu enrichment.","PeriodicalId":18682,"journal":{"name":"Mineralium Deposita","volume":"17 1","pages":""},"PeriodicalIF":4.8,"publicationDate":"2026-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146101461","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-02-02DOI: 10.1007/s00126-025-01423-2
Adam Abersteiner, Carl Spandler, Benjamin Wade
{"title":"Petrogenesis of Fe-Ti-V oxide mineralisation in the Kalka intrusion (Giles intrusions – Musgrave Province, South Australia)","authors":"Adam Abersteiner, Carl Spandler, Benjamin Wade","doi":"10.1007/s00126-025-01423-2","DOIUrl":"https://doi.org/10.1007/s00126-025-01423-2","url":null,"abstract":"","PeriodicalId":18682,"journal":{"name":"Mineralium Deposita","volume":"96 1","pages":""},"PeriodicalIF":4.8,"publicationDate":"2026-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146101474","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-01-26DOI: 10.1007/s00126-026-01432-9
S. García de Madinabeitia, A. Beranoaguirre, P. Martínez, R. Castroviejo, E. Ortega, F. Bastida, E. W. G. Hellebrand, E. Burkhalter, J. I. Gil Ibarguchi
{"title":"Authigenic grey monazite from ordovician metasediments of the Iberian massif: the Matamulas placer","authors":"S. García de Madinabeitia, A. Beranoaguirre, P. Martínez, R. Castroviejo, E. Ortega, F. Bastida, E. W. G. Hellebrand, E. Burkhalter, J. I. Gil Ibarguchi","doi":"10.1007/s00126-026-01432-9","DOIUrl":"https://doi.org/10.1007/s00126-026-01432-9","url":null,"abstract":"","PeriodicalId":18682,"journal":{"name":"Mineralium Deposita","volume":"30 1","pages":""},"PeriodicalIF":4.8,"publicationDate":"2026-01-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146048554","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-01-22DOI: 10.1007/s00126-026-01430-x
Lauren R. Terry, Thomas Monecke, T. James Reynolds, Filip Kasprowicz, Katharina Pfaff
{"title":"Microtextural characteristics of adularia in banded quartz veins from the Midas low-sulfidation epithermal deposit, Nevada","authors":"Lauren R. Terry, Thomas Monecke, T. James Reynolds, Filip Kasprowicz, Katharina Pfaff","doi":"10.1007/s00126-026-01430-x","DOIUrl":"https://doi.org/10.1007/s00126-026-01430-x","url":null,"abstract":"","PeriodicalId":18682,"journal":{"name":"Mineralium Deposita","volume":"31 1","pages":""},"PeriodicalIF":4.8,"publicationDate":"2026-01-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146048555","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-01-19DOI: 10.1007/s00126-025-01427-y
Yang Bai, Ben-Xun Su, Yan Xiao, Yong-Sheng He, Yishen Zhang, Bernard Charlier
{"title":"Magnesium isotope constraints on the origin of stratiform chromitite","authors":"Yang Bai, Ben-Xun Su, Yan Xiao, Yong-Sheng He, Yishen Zhang, Bernard Charlier","doi":"10.1007/s00126-025-01427-y","DOIUrl":"https://doi.org/10.1007/s00126-025-01427-y","url":null,"abstract":"","PeriodicalId":18682,"journal":{"name":"Mineralium Deposita","volume":"45 1","pages":""},"PeriodicalIF":4.8,"publicationDate":"2026-01-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146005660","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-01-15DOI: 10.1007/s00126-026-01428-5
D. A. Del Bono, L. G. Borda, L. V. Godfrey, N. L. Chiaramonte, C. Balbis, A. I. Pasquini, M. G. García
{"title":"Mineralogical and chemical transformations of volcanic ash and rocks through interaction with water: insights into the genesis of lithium deposits in Puna Brines","authors":"D. A. Del Bono, L. G. Borda, L. V. Godfrey, N. L. Chiaramonte, C. Balbis, A. I. Pasquini, M. G. García","doi":"10.1007/s00126-026-01428-5","DOIUrl":"https://doi.org/10.1007/s00126-026-01428-5","url":null,"abstract":"","PeriodicalId":18682,"journal":{"name":"Mineralium Deposita","volume":"266 1","pages":""},"PeriodicalIF":4.8,"publicationDate":"2026-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145968625","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-01-09DOI: 10.1007/s00126-025-01422-3
Homayoun Fathollahzadeh, Jorge Crespo Mena, Simon M. Jowitt
{"title":"Assessing the geochemical anomalies of bismuth, gallium, indium, and tellurium in the Río Blanco porphyry Cu-Mo deposit, central Chile; implications for the critical mineral and metal potential of porphyry copper systems","authors":"Homayoun Fathollahzadeh, Jorge Crespo Mena, Simon M. Jowitt","doi":"10.1007/s00126-025-01422-3","DOIUrl":"https://doi.org/10.1007/s00126-025-01422-3","url":null,"abstract":"","PeriodicalId":18682,"journal":{"name":"Mineralium Deposita","volume":"29 1","pages":""},"PeriodicalIF":4.8,"publicationDate":"2026-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145947201","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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