Mineralogy and Petrology最新文献

{"title":"Monazites, granites, and plate tectonics: a tribute to Fritz Finger","authors":"Jiří Žák, Kryštof Verner, Christoph A. Hauzenberger","doi":"10.1007/s00710-026-00991-z","DOIUrl":"10.1007/s00710-026-00991-z","url":null,"abstract":"","PeriodicalId":18547,"journal":{"name":"Mineralogy and Petrology","volume":"120 2","pages":"241 - 246"},"PeriodicalIF":1.1,"publicationDate":"2026-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148173039","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The Staré mesto granite: its dating and genetic implications for the Variscan magmatism of the Western Carpathians","authors":"Milan Kohút,&nbsp;Igor Broska,&nbsp;Patrik Konečný,&nbsp;Sergii Kurylo,&nbsp;Keewook Yi","doi":"10.1007/s00710-026-00988-8","DOIUrl":"10.1007/s00710-026-00988-8","url":null,"abstract":"<div><p>Detailed research on a small, isolated granite body, the so-called the Staré mesto granite (SMG), has yielded different information than are known from the main body of the Bratislava massif (Malé Karpaty Mts. in Western Carpathians, Slovakia). The SMG with a known gold mineralization is exposed as a small, elongated granite body hosted within the biotite gneisses of the Pezinok Group that are missing in the main Bratislava granite massif, because of a deeper erosion level. The high-potassium content, peraluminous and magnesium character of studied SMG granites are analogous to the evolved felsic members of the main granitic body. However, new dating results, i.e., a zircon U–Th–Pb isotopic age of 363.5 ± 2.1 Ma and a monazite chemical Th–U–Pb age of 360.7 ± 2.8 Ma are different from the magmatic age of ca. 355–353 Ma determined for the main granite body of the Bratislava massif. It is suggested that melting of the SMG granite source occurred during the initial stage of the Variscan continental collision before ca. 360 Ma, while the main granitic body of the Bratislava Massif was formed in the course of the late-collision granite flare-up before ca. 355–353 Ma.</p></div>","PeriodicalId":18547,"journal":{"name":"Mineralogy and Petrology","volume":"120 2","pages":"395 - 413"},"PeriodicalIF":1.1,"publicationDate":"2026-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s00710-026-00988-8.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148173257","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Experimental alteration of zircon and xenotime-(Y) using alkali-, and alkaline-rich fluids in an Fe-enriched granitic environment","authors":"Fabian Tramm,&nbsp;Bernd Wunder,&nbsp;Bartosz Budzyń,&nbsp;Gabriela A. Kozub-Budzyń,&nbsp;Krzysztof Foltyn,&nbsp;Jiří Sláma","doi":"10.1007/s00710-026-00985-x","DOIUrl":"10.1007/s00710-026-00985-x","url":null,"abstract":"<div><p>In the present study, the stability of zircon and xenotime-(Y) are experimentally tested by using a mixture of solids including xenotime-(Y), zircon, albite, K-feldspar, muscovite, biotite, magnetite, SiO₂ and different fluids, i.e. 2 M KOH, 2 M NaOH, Ca(OH)₂ solution, and CaCl₂ solution, to replicate a granitic alkali- and Fe-enriched environment in four Au-capsules. The experiments were conducted at 200 MPa, 650 °C and over 7 d. The zircon and xenotime-(Y) were altered at various degrees. The experiment with 2 M KOH resulted in the lowest degree of zircon and xenotime-(Y) alteration, whereas experiments with 2 M NaOH and Ca(OH)₂–solution resulted in a moderate degree of alteration with well-developed porosity and partial dissolution of zircon, xenotime-(Y), and magnetite. The U-Pb ages of zircon are significantly disturbed resulting in a reverse discordant trend of data that plot along the concordia curve towards older ages. Xenotime-(Y) U-Pb ages remained mostly undisturbed. The experiment with CaCl₂–solution was the most effective considering alteration of the entire mineral assemblage. Xenotime-(Y) and zircon are strongly altered with significantly disturbed U-Pb ages. Furthermore, xenotime-(Y) is partially replaced by secondary britholite-(Y). The experimental results provide new insights to our understanding of xenotime-(Y) and zircon interactions with alkali- and alkaline-rich fluids. The particular importance is that of the observed reverse discordant U-Pb ages of altered zircon and, to a lesser degree, xenotime-(Y) towards older ages along the concordia curve, which may be related to coupled U⁶⁺ and Fe²⁺ mobilization by Fe-bearing reactive fluids due to dissolution of magnetite.</p></div>","PeriodicalId":18547,"journal":{"name":"Mineralogy and Petrology","volume":"120 2","pages":"247 - 271"},"PeriodicalIF":1.1,"publicationDate":"2026-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148173120","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Most ordinary granitic magmas are born as charnockites or become charnockites during magma ascent: evidence for the prior existence of orthopyroxene and implications of high magma temperatures and inefficient crystal-melt separation","authors":"John D. Clemens,&nbsp;Gary Stevens","doi":"10.1007/s00710-026-00990-0","DOIUrl":"10.1007/s00710-026-00990-0","url":null,"abstract":"<div><p>H₂O-undersaturated experiments and phase-equilibrium modelling demonstrate that orthopyroxene is the main ferromagnesian mineral formed during high-temperature crystallisation of most S-type and many I-type granitic (s.l.) magmas. In most examples, at any pressure relevant to crustal magmatism, orthopyroxene will be stable to <i>T</i> &gt; 935 °C, in typical calc-alkaline metaluminous or peraluminous granitic magmas. Once such magmas cool to between 800 and 750 °C, almost all the ferromagnesian component will have crystalised as pyroxene. On further cooling, orthopyroxene will react to biotite within a narrow temperature band (~ 30 °C). Textures in granitic rocks attest to this, although the significance of the textures produced by this reaction can be overlooked. Pristine orthopyroxene is rarely found in fully crystallised granitic rocks because such preservation would require solidification at <i>P</i> &lt; 1 kbar. During crystallisation at higher <i>P</i>, biotite-quartz aggregates replace orthopyroxene, resulting in a variety of diagnostic textures. Due to the normal, high-temperature, perisolidus, textural modifications in granitic rocks, the biotite-quartz pseudomorphs after early-formed orthopyroxene may be disregarded or simply described as ‘mafic clots’. As the presence of orthopyroxene has important implications for the temperatures and H₂O contents of granitic magmas, we present an atlas of textures to assist in recognising these pseudomorphs. An important implication of the presence of orthopyroxene near the liquidi of many granitic magmas is that they formed at <i>T</i> &gt; 800 °C, through fluid-absent or H₂O-undersaturated melting of biotite-bearing or biotite + hornblende-bearing assemblages. Complete supersolidus reaction of orthopyroxene to biotite would be prevented by significant melt loss from the system. Thus, the rarity of orthopyroxene in granitic rocks indicates that fractional crystallization of granitic magmas at <i>T</i> &gt; 750 °C is uncommon and that the loss of a silicic volcanic liquid fraction is also generally unlikely.</p></div>","PeriodicalId":18547,"journal":{"name":"Mineralogy and Petrology","volume":"120 2","pages":"381 - 393"},"PeriodicalIF":1.1,"publicationDate":"2026-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s00710-026-00990-0.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148173121","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"New geochronological constraints on the Ordovician plutonism and Cenerian orogeny in the Ötztal Complex, Eastern Alps","authors":"Jiří Žák,&nbsp;Martin Svojtka,&nbsp;Jiří Sláma,&nbsp;Roger Zurbriggen,&nbsp;Andreas Schindlmayr,&nbsp;František Vacek,&nbsp;Fritz Finger,&nbsp;Jitka Míková","doi":"10.1007/s00710-026-00987-9","DOIUrl":"10.1007/s00710-026-00987-9","url":null,"abstract":"<div>\u0000 \u0000 <p>This study presents new U–Pb–Hf isotopic data and zircon ages from the Ediacaran to Ordovician Ötztal Complex of the Eastern Alps in Austria to provide new constraints on the evolution of the northern Gondwana active margin in the “proto-Alpine” realm. The multistage tectonic evolution of the complex started with siliciclastic deposition presumably in an accretionary wedge that may have lasted from ca. 600 Ma to ca. 517 Ma. The age spectra are dominated by Neoproterozoic zircon grains indicating that the complex was most likely sourced from the Arabian–Nubian shield, with a contribution of older Proterozoic and Archean grains from the more westerly Saharan metacraton. The deposition was partly overlapping in time with Cambrian to Early Ordovician mafic magmatism that formed either as mafic underplate below the accretionary wedge or outboard, being later accreted as part of the lower plate. The wedge was then intruded by compositionally diverse granitoids from ca. 500 Ma until ca. 440 Ma. By comparing the Ediacaran and Early Paleozoic evolution of the Ötztal Complex with originally more westerly Cadomian-basement terranes (e.g., those now found in the Bohemian Massif), we concluded that the Cenerian orogeny was generally younger in the proto-Alps than elsewhere in the former Cadomian belt. This was possibly due to a significantly curved geometry of the northern Gondwana margin and/or due to an eastward ridge–trench–transform triple point migration. Arrival of a warmer part of the oceanic plate then may have caused mantle melting, mafic underplating, and voluminous granitic plutonism in the forearc, perhaps finally terminated by ridge–trench interaction and slab break-off.</p>\u0000 </div>","PeriodicalId":18547,"journal":{"name":"Mineralogy and Petrology","volume":"120 2","pages":"415 - 439"},"PeriodicalIF":1.1,"publicationDate":"2026-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s00710-026-00987-9.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148173420","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Datable remnants of uraninite microcrystals of Proterozoic age in Variscan high-grade metamorphic graphite schists from the Southern Bohemian Massif, Austria","authors":"Friedrich Finger,&nbsp;Michael Waitzinger,&nbsp;Dominik Sorger,&nbsp;Etienne Skrzypek,&nbsp;Frank Melcher,&nbsp;Manfred Linner","doi":"10.1007/s00710-026-00984-y","DOIUrl":"10.1007/s00710-026-00984-y","url":null,"abstract":"<div>\u0000 \u0000 <p>Graphite-bearing metamorphic rocks in the Southern Bohemian Massif regularly contain tiny (1–10 µm) uraninite crystals. Spatially highly resolved, electron-beam-based, U-Th-total Pb dating reveals an unexpectedly great geochronological potential for these micrometre-sized uraninite crystals. Most of them gave relatively precise geochronological information for the Variscan high-grade metamorphism in this area (around 340 Ma), but older remnant uraninite domains were also recognized and dated at an Ediacaran and an even older Tonian age. The most spectacular result of our study is the discovery of a 5 µm uraninite grain with a well-defined threefold age zoning: Ediacaran and Tonian inner domains are overgrown by a Variscan uraninite shell and survived Variscan high-grade metamorphic conditions transitional to granulite facies without suffering substantial lead loss. High radiogenic Pb contents of around 10 wt% in the core of this grain are stabilized in the form of PbS nanodomains.</p>\u0000 </div>","PeriodicalId":18547,"journal":{"name":"Mineralogy and Petrology","volume":"120 2","pages":"295 - 308"},"PeriodicalIF":1.1,"publicationDate":"2026-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s00710-026-00984-y.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148173011","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Dynamics of large and hot subduction-accretion complexes: insights from fossil Paleozoic and active Cenozoic systems","authors":"Armin Dielforder,&nbsp;Roger Zurbriggen","doi":"10.1007/s00710-026-00976-y","DOIUrl":"10.1007/s00710-026-00976-y","url":null,"abstract":"<div>\u0000 \u0000 <p>In the aftermath of Neoproterozoic Panafrican orogenies including the Cadomian orogeny, the erosion of mountain belts increased the sediment supply into circum-Gondwanan subduction systems. In response, super-large subduction-accretion complexes that encompassed the entire upper plate formed during the Cambrian and Ordovician. Cenerian basement units within and outside the European Alps were recently interpreted to represent remnants of such Cambro-Ordovician subduction-accretion complexes hosting a predominantly peraluminous magmatic arc. However, the dynamics and cratonization process of such hot complexes has not been evaluated in mechanical terms. We therefore corroborate the existing model based on petrological data by mechanical considerations and insights from active subduction zones with respect to the following three aspects of Cenerian basement units: Firstly, the lithological spectra, the rock volumes and metamorphic record indicate a crust recycling process as it occurs at an active margin, fed by a very high sediment supply, and hosting a peraluminous magmatic arc. Secondly, moderately to steeply oriented elongated sheets of plutonic bodies point to synmagmatic strike-slip faulting and margin-parallel shear indicating oblique subduction and a near-neutral stress state in the thermally weakened volcanic arc region. Thirdly, the Cenerian pressure-temperature-time (P-T-t) evolution is in line with lateral crustal growth by analogy to modern subduction-accretion systems, without producing high topography of an overthickened crust due to the low-stress conditions. The geological and mechanical constraints gained from active subduction-accretion systems are consistent with field observations and the petrology of Cenerian crystalline basements units regarding the setting of super-large cratonizing subduction-accretion complexes during anatexis and peraluminous arc magmatism.</p>\u0000 </div>","PeriodicalId":18547,"journal":{"name":"Mineralogy and Petrology","volume":"120 2","pages":"441 - 453"},"PeriodicalIF":1.1,"publicationDate":"2026-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s00710-026-00976-y.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148172558","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Formation and fluid-driven transformation of accessory Zr–Th–U and REE minerals in an F-rich environment: the Markersbach A-type granite, Erzgebirge, Germany","authors":"Martin Ondrejka,&nbsp;Hans-Jürgen Förster,&nbsp;Maëlys Bévan,&nbsp;Pavel Uher,&nbsp;Chrisfanel Eurode Kianguebene-Koussingounina,&nbsp;Marek Osacký,&nbsp;Nasser Mourad Mahdy","doi":"10.1007/s00710-026-00981-1","DOIUrl":"10.1007/s00710-026-00981-1","url":null,"abstract":"<div>\u0000 \u0000 <p>The Markersbach intrusion (Erzgebirge, Germany) is a late Variscan, early post-collisional, highly evolved, autometasomatically and hydrothermally altered F-rich, P-poor, aluminous A-type granite. It ranges from coarse-grained biotite monzogranite to fine-grained leucosyenogranite. The rich accessory mineral assemblage comprises, in addition to diverse Nb–Ta–Sn–W–Ti–Fe species, abundant zircon, thorite, topaz fluorite and fluocerite-(Ce), rare xenotime-(Y) and chernovite-(Y), synchysite-(Y) enriched in thorbästnasite component, synchysite-(Ce) and extremely rare monazite-(Ce). Lithium-rich siderophyllite commonly hosts annular radiohaloes developed around Th-rich zircon and thorite. These consist of Th-rich, metamict cores surrounded by a clay-rich alteration zone and a non-stoichiometric Th–Y–Si rim that locally is rimmed by goethite (± limonite). Their textures reflect alpha-recoil damage and localised element redistribution. The dimensions of the haloes and mineral compositions indicate radiation damage controlled predominantly by the ²³²Th decay chain. Zircon, thorite and xenotime form complex Zr(Hf)–Th(U)–Y(REE) solid-solutions (with REE – rare earth elements), which commonly experienced strong metamictisation, hydration and fluorination [≤ 6.8 wt% F in thorite, ≤ 3.8 wt% F in zircon, ≤ 1.1 wt% F in xenotime-(Y)]. Zircon and thorite are the principal hosts of immobile Th, whereas U is largely sequestered in secondary pyrochlore. Interaction with late fluids gave rise to local destabilisation of monazite-(Ce) and promoted various dissolution–reprecipitation reactions, producing Y-poor fluorite II, synchysite-(Y), and sporadic Ca_0.5Th_0.5F₃ micro-inclusions in re-equilibrated fluocerite-(Ce). Rare chernovite-(Y) and As-bearing zircon–thorite assemblages further imply the involvement of oxidising, As-rich fluids. The evolution of REE–Zr–Th–U mineral phases records both the fractionation history of the halogen-enriched, P-poor parental melt and the subsequent subsolidus fluid-mediated re-equilibration in an F-rich environment, resulting in multi-stage LILE and HFSE redistribution within the granite, postdated by widespread U removal from the granite in the Cretaceous.</p>\u0000 </div>","PeriodicalId":18547,"journal":{"name":"Mineralogy and Petrology","volume":"120 2","pages":"273 - 293"},"PeriodicalIF":1.1,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s00710-026-00981-1.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148172593","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Controls on polymetamorphism in the Southern Pan-African Kaoko belt (Namibia) by petrochronology with EPMA Th-U-Pb monazite dating and geothermobarometry in Garnet metapelites","authors":"Bernhard Schulz,&nbsp;Thomas M. Will","doi":"10.1007/s00710-026-00974-0","DOIUrl":"10.1007/s00710-026-00974-0","url":null,"abstract":"<div>\u0000 \u0000 <p>Petrochronology with garnet and monazite was performed on refurbished metapelite samples from the Central Kaoko Zone (CKZ), the Western Kaoko Zone (WKZ) and the Orogenic Core Zone (OCZ). P-T path segments of garnet crystallisation were reconstructed by geothermobarometry based on continuous cation exchange and net transfer reactions. The oldest metamorphic monazite populations of 1490 ± 15 Ma and 635 ± 7 Ma occur enclosed in garnet porphyroblasts and signal Meso-Proterozoic and early Pan-African high-grade metamorphic events. According to the sample position next to a ~ 550 Ma granitoid gneiss, a monazite population at 552 ± 4 Ma may be assigned to a local contact metamorphism. In the WKZ and OCZ the further monazite age isochrones range from 546 ± 12 Ma to 532 ± 5 Ma, and in the CKZ from 528 ± 4 Ma to 502 ± 5 Ma. When interpreted in terms of metamorphic P-T paths and the stability field of monazite, the formation of these late Pan-African monazites are pre-, syn-, and postcrystalline to late Pan-African garnet blastesis. P-T conditions for Mg-rich garnet rims increase from E to W within the CKZ from 550 to 650 °C at 9 kbar. Maximal P-T conditions in the OCZ were 705 °C/7.9 kbar. Garnets in the WKZ display retrograde zonation trends with Mg-rich cores crystallising at 700 °C/4–6 kbar. In the westernmost WKZ sample the garnet core crystallised at 780 °C/7.4 kbar and could be of early Pan-African age. Monazite ages and geothermobarometry confirm results from isotope age dating methods.</p>\u0000 </div>","PeriodicalId":18547,"journal":{"name":"Mineralogy and Petrology","volume":"120 2","pages":"359 - 379"},"PeriodicalIF":1.1,"publicationDate":"2026-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s00710-026-00974-0.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148172960","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Contrasting behaviour of accessory phases during partial melting of orthogneiss – a case study from Mt. Papuk, Croatia","authors":"Daniela Gallhofer,&nbsp;Etienne Skrzypek,&nbsp;Petra Schneider,&nbsp;Dražen Balen,&nbsp;Christoph A. Hauzenberger","doi":"10.1007/s00710-026-00975-z","DOIUrl":"10.1007/s00710-026-00975-z","url":null,"abstract":"<div>\u0000 \u0000 <p>Partial melting during the tectono-metamorphic evolution of collisional orogens results in the formation of migmatites or granitoids and partial to full resorption of the precursor’s accessory phases, such as zircon and monazite. While in many cases both minerals newly crystallize from partial melt, they can also show contrasting degrees of preservation/dissolution. This study presents an example of nearly full zircon preservation but completely new monazite growth during partial melting of a mildly peraluminous orthogneiss from Mt. Papuk, Croatia. We combine U-Pb zircon and Th-U-total Pb monazite dating, zircon trace element and whole rock geochemical data with phase equilibria modelling and use solubility models of accessory phases to constrain the P-T conditions of partial melting. Zircon textures support igneous crystallization while trace elements are characteristic for an S-type granite composition. Zircon yields a Cambrian crystallization age of the protolith at 498.9 ± 6.9 Ma. Conversely, monazite records only Carboniferous anatexis of the orthogneiss at ca. 350 Ma, while zircon mostly remains unaffected. The results of phase equilibria modelling that account for nearly full zircon preservation (&lt; 10% dissolution) and complete monazite dissolution and regrowth indicate P-T conditions of 5-8.5 kbar and 760–800 °C. Our results suggest that a low degree of partial melting (&lt; 10 vol%) in an orthogneiss with an S-type granite signature may occur without water influx at &lt; 800 °C. This will preserve protolith ages in zircon but erase them in original monazite. The contrasting behaviour of these accessory chronometers can be used as a tool to bracket the temperature conditions of anatexis.</p>\u0000 </div>","PeriodicalId":18547,"journal":{"name":"Mineralogy and Petrology","volume":"120 2","pages":"309 - 332"},"PeriodicalIF":1.1,"publicationDate":"2026-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s00710-026-00975-z.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148172809","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}