000117467 001__ 117467
000117467 005__ 20240319081000.0
000117467 0247_ $$2doi$$a10.1016/j.oregeorev.2021.104657
000117467 0248_ $$2sideral$$a128145
000117467 037__ $$aART-2022-128145
000117467 041__ $$aeng
000117467 100__ $$aGonzalez-Perez, Igor
000117467 245__ $$aGenesis and evolution of the San Manuel iron skarn deposit (Betic Cordillera, SW Spain)
000117467 260__ $$c2022
000117467 5060_ $$aAccess copy available to the general public$$fUnrestricted
000117467 5203_ $$aThe San Manuel magnesian skarn is an iron deposit hosted in dolomitic marbles from a tectonic slice imbricated within the Ronda peridotites, in the westernmost part of the Betic Cordillera, Spain. According to the dominant mineral assemblage, the skarn is subdivided into three different zones, (1) forsterite +/- calcite skarn, (2) calcite +/- chlorite +/- serpentine skarn, and (3) Ca-amphibole skarn. The main ore in the skarn is a similar to 2.5 m thick, massive ore body situated in the middle of the sequence. In this paper, we firstly report a comprehensive major to trace element composition, texture, microstructure, and mineralogy characterization for zoned magnesioferritemagnetite grains of the San Manuel deposit using a combination of (1) laser ablation inductively coupled plasma mass spectrometer, (2) focused ion beam combined with transmission electron microscopy, and (3) electron back-scattered diffraction. We have defined four different magnesioferrite-magnetite generations. A complete sequence of zoning includes cores of magnesioferrite (Mag-1; MgO up to 10.6 wt%) overprinted by three successive generations of magnetite, namely Mag-2, Mag-3, Mag-4. Mag-2 (MgO < 4 wt%), hosts composite forsterite +/- calcite +/- chlorite inclusions, consistently with high Si, Ca, and Sr (average: 8204 ppm, 8980 ppm, and 49 ppm respectively) contents detected by in situ laser ablation inductively coupled plasma (LA-ICP-MS). Mag-3 replacing former Mag-1 and Mag-2 includes nanometric spinel and gahnite exsolutions detected by focused ion beam combined with a transmission electron microscope (FIB-TEM), which is consistent with its high Al, Ti, V, and Ga (average: 5073 ppm, 368 ppm, and 20 ppm, respectively) trace element concentration. Mag-4 is the Fe-richest magnetite (up to 94.16 wt% FeOtotal) forming the outermost rims in magnetite grains, and exhibiting the lowest total trace element contents. Approaches in temperature estimations employing magnetitespinel exsolutions in Mag-3 suggest that the minimum temperature of the prograde stage reached temperatures below 700 degrees C, whereas Mag-4 should be formed during the retrograde stage. Magnetite microstructure studied by electron backscatter diffraction (EBSD) suggests Mag-4 formation under fluid-assisted dynamic conditions, which is consistent with the tectonic evolution of the emplacement. We propose that the San Manuel deposit formed by pulsed hydrothermal fluids derived from anatexis of crustal rocks during peridotite emplacement, promoting reequilibration processes that led to the magnesioferrite-magnetite zoning.
000117467 536__ $$9info:eu-repo/grantAgreement/ES/MCIU/RTI2018-099157-A-I00$$9info:eu-repo/grantAgreement/ES/MICINN/PRE2019-088262$$9info:eu-repo/grantAgreement/ES/MINECO/RYC-2015-17596
000117467 540__ $$9info:eu-repo/semantics/openAccess$$aby$$uhttp://creativecommons.org/licenses/by/3.0/es/
000117467 590__ $$a3.3$$b2022
000117467 592__ $$a1.172$$b2022
000117467 591__ $$aGEOLOGY$$b5 / 48 = 0.104$$c2022$$dQ1$$eT1
000117467 593__ $$aEconomic Geology$$c2022$$dQ1
000117467 591__ $$aMINING & MINERAL PROCESSING$$b6 / 20 = 0.3$$c2022$$dQ2$$eT1
000117467 593__ $$aGeology$$c2022$$dQ1
000117467 591__ $$aMINERALOGY$$b8 / 29 = 0.276$$c2022$$dQ2$$eT1
000117467 593__ $$aGeochemistry and Petrology$$c2022$$dQ1
000117467 594__ $$a6.2$$b2022
000117467 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/publishedVersion
000117467 700__ $$aGonzalez-Jimenez, Jose M.
000117467 700__ $$aGervilla, Fernando
000117467 700__ $$0(orcid)0000-0002-0302-2737$$aFanlo, Isabel$$uUniversidad de Zaragoza
000117467 700__ $$aTornos, Fernando
000117467 700__ $$0(orcid)0000-0002-9615-9168$$aColas, Vanessa$$uUniversidad de Zaragoza
000117467 700__ $$0(orcid)0000-0002-0710-9178$$aArranz, Enrique$$uUniversidad de Zaragoza
000117467 700__ $$aHanchar, John
000117467 700__ $$adel Mar Abad-Ortega, Maria
000117467 700__ $$aMoreno-Abril, Antonio J.
000117467 700__ $$aCarrion, Maria
000117467 700__ $$aNoval, Samuel
000117467 7102_ $$12000$$2685$$aUniversidad de Zaragoza$$bDpto. Ciencias de la Tierra$$cÁrea Petrología y Geoquímica
000117467 7102_ $$12000$$2120$$aUniversidad de Zaragoza$$bDpto. Ciencias de la Tierra$$cÁrea Cristalografía Mineralog.
000117467 773__ $$g141, 104657 (2022), [21 pp]$$pOre geol. rev.$$tORE GEOLOGY REVIEWS$$x0169-1368
000117467 8564_ $$s3378373$$uhttps://zaguan.unizar.es/record/117467/files/texto_completo.pdf$$yVersión publicada
000117467 8564_ $$s2148764$$uhttps://zaguan.unizar.es/record/117467/files/texto_completo.jpg?subformat=icon$$xicon$$yVersión publicada
000117467 909CO $$ooai:zaguan.unizar.es:117467$$particulos$$pdriver
000117467 951__ $$a2024-03-18-14:03:42
000117467 980__ $$aARTICLE