<?xml version="1.0" encoding="UTF-8"?><?xml-stylesheet type="text/xsl" href="static/style.xsl"?><OAI-PMH xmlns="http://www.openarchives.org/OAI/2.0/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.openarchives.org/OAI/2.0/ http://www.openarchives.org/OAI/2.0/OAI-PMH.xsd"><responseDate>2026-06-27T22:43:05Z</responseDate><request verb="GetRecord" identifier="oai:docta.ucm.es:20.500.14352/101855" metadataPrefix="marc">https://docta.ucm.es/rest/oai/request</request><GetRecord><record><header><identifier>oai:docta.ucm.es:20.500.14352/101855</identifier><datestamp>2025-08-26T15:28:03Z</datestamp><setSpec>com_20.500.14352_14</setSpec><setSpec>col_20.500.14352_15</setSpec></header><metadata><record xmlns="http://www.loc.gov/MARC21/slim" xmlns:dcterms="http://purl.org/dc/terms/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:doc="http://www.lyncode.com/xoai" xsi:schemaLocation="http://www.loc.gov/MARC21/slim http://www.loc.gov/standards/marcxml/schema/MARC21slim.xsd">
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      <subfield code="a">Jorge Pinto, Andre Filipe</subfield>
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      <subfield code="a">Sánchez Pastor, Nuria</subfield>
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      <subfield code="a">Santos Jorge,  Raúl</subfield>
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      <subfield code="c">2023</subfield>
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      <subfield code="a">Chemical equilibria and the relative stability of Fe-Mn phases are the main governing factors behind themineralogical characteristics and elemental distribution of iron and manganese in supergene enrichment deposits. In the present work, we focus on the textural, mineralogical and chemical investigation of mineral associations, typical of the enriched zone of the vein-hosted Fe-Mn deposit of Serra da Mina, SW Portugal, by means of microRaman spectroscopy and electron microprobe analysis (EMPA). The coupling of such methods enabled both the identification of the main mineralogical components and their corresponding paragenetic sequence of crystallization.</subfield>
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      <subfield code="a">Jorge Pinto, Andre Filipe, et al. Mn-Oxides from Serra Da Mina Deposit: Mineralogy and Paragenetic Sequence of Crystallization. 2023. docta.ucm.es, https://hdl.handle.net/20.500.14352/101855.</subfield>
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      <subfield code="a">https://www.semineral.es/websem/PdfServlet?mod=archivos&amp;subMod=publicaciones&amp;archivo=Macla%2027-56.pdf</subfield>
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      <subfield code="a">Mn-oxides from Serra da Mina deposit: mineralogy and paragenetic sequence of crystallization</subfield>
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