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Development of Holocene lacustrine microbialites on the Iberian Peninsula: Insights into environmental and depositional controls using X‐ray CT and petrography.

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Title: Development of Holocene lacustrine microbialites on the Iberian Peninsula: Insights into environmental and depositional controls using X‐ray CT and petrography.
Authors: Doyle, Connor1 (AUTHOR), Corella, Juan Pablo2 (AUTHOR), Behnsen, Julia3 (AUTHOR), Morellón, Mario4 (AUTHOR), Martín‐Puertas, Celia5 (AUTHOR), Garcés, Blas Valero6 (AUTHOR), Schröder, Stefan1 (AUTHOR) stefan.schroeder@manchester.ac.uk
Source: Sedimentology. Jun2026, Vol. 73 Issue 4, p1148-1184. 37p.
Subject Terms: *Microbial mats, *Paleoenvironmental studies, *Petrology, *Peninsulas, *Computed tomography, *Sedimentation & deposition
Geographic Terms: Iberian Peninsula
Abstract: Microbial mats and microbialites are common in modern and ancient saline lacustrine environments and are highly responsive to biological and environmental factors. As such, they represent important sources of high‐resolution environmental data across a wide range of geological time. Nonetheless, interpretation of fossil mats is non‐trivial due to the variable combinations of intrinsic and extrinsic controls, diagenetic modification, preservation and complex morphological characteristics. This study combines X‐ray computed tomography (CT) scans with high‐resolution morphological and petrographic analyses of Holocene microbial mats from several lacustrine sites in the Iberian Peninsula to determine relationships between microbialite morphology, texture and environmental controls. Modern and subrecent mats (<0.2 ka BP) occur in Laguna Salada de Chiprana and saline Laguna Zóñar, whereas older Holocene mats (~0.2 to 10 ka BP) were sampled from saline Lago de Arreo and brackish‐saline Lago de Estanya. All studied mats developed preferentially during periods of low lake levels, reduced sediment input and elevated water salinity, although various combinations of these factors can operate in individual lakes and at different times. Environmental factors (e.g. water chemistry, light, mineral precipitation) and community composition are additional controls acting in individual lakes. Domical and undulatory mats accreted relatively rapidly during periods of low detrital sedimentation rates. The generally flatter microbialite morphologies and higher abundance of grains within microbialites from lakes Arreo and Estanya reflect elevated detrital input. Endogenic mineral phases such as gypsum further promote domical, columnar and pseudo‐dendritic mat structures. Formation of columns and conical tufts in littoral settings of Laguna Salada de Chiprana is a response to gradients of light, oxygenation and concomitant community change between photosynthesisers, green and red sulphur bacteria in littoral settings and sulphate reducers in profundal environments. The controls over microbialite characteristics recognised in this study span a range of depositional settings and timescales and underpin the effective use of microbialites in palaeoenvironmental reconstruction. [ABSTRACT FROM AUTHOR]
Database: Energy & Power Source
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DbLabel: Energy & Power Source
An: 194450294
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PubType: Academic Journal
PubTypeId: academicJournal
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  Data: Development of Holocene lacustrine microbialites on the Iberian Peninsula: Insights into environmental and depositional controls using X‐ray CT and petrography.
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  Data: &lt;searchLink fieldCode=&quot;AR&quot; term=&quot;%22Doyle%2C+Connor%22&quot;&gt;Doyle, Connor&lt;/searchLink&gt;&lt;relatesTo&gt;1&lt;/relatesTo&gt; (AUTHOR)&lt;br /&gt;&lt;searchLink fieldCode=&quot;AR&quot; term=&quot;%22Corella%2C+Juan+Pablo%22&quot;&gt;Corella, Juan Pablo&lt;/searchLink&gt;&lt;relatesTo&gt;2&lt;/relatesTo&gt; (AUTHOR)&lt;br /&gt;&lt;searchLink fieldCode=&quot;AR&quot; term=&quot;%22Behnsen%2C+Julia%22&quot;&gt;Behnsen, Julia&lt;/searchLink&gt;&lt;relatesTo&gt;3&lt;/relatesTo&gt; (AUTHOR)&lt;br /&gt;&lt;searchLink fieldCode=&quot;AR&quot; term=&quot;%22Morell&#243;n%2C+Mario%22&quot;&gt;Morell&#243;n, Mario&lt;/searchLink&gt;&lt;relatesTo&gt;4&lt;/relatesTo&gt; (AUTHOR)&lt;br /&gt;&lt;searchLink fieldCode=&quot;AR&quot; term=&quot;%22Mart&#237;n‐Puertas%2C+Celia%22&quot;&gt;Mart&#237;n‐Puertas, Celia&lt;/searchLink&gt;&lt;relatesTo&gt;5&lt;/relatesTo&gt; (AUTHOR)&lt;br /&gt;&lt;searchLink fieldCode=&quot;AR&quot; term=&quot;%22Garc&#233;s%2C+Blas+Valero%22&quot;&gt;Garc&#233;s, Blas Valero&lt;/searchLink&gt;&lt;relatesTo&gt;6&lt;/relatesTo&gt; (AUTHOR)&lt;br /&gt;&lt;searchLink fieldCode=&quot;AR&quot; term=&quot;%22Schr&#246;der%2C+Stefan%22&quot;&gt;Schr&#246;der, Stefan&lt;/searchLink&gt;&lt;relatesTo&gt;1&lt;/relatesTo&gt; (AUTHOR)&lt;i&gt; stefan.schroeder@manchester.ac.uk&lt;/i&gt;
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  Data: &lt;searchLink fieldCode=&quot;JN&quot; term=&quot;%22Sedimentology%22&quot;&gt;Sedimentology&lt;/searchLink&gt;. Jun2026, Vol. 73 Issue 4, p1148-1184. 37p.
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  Data: *&lt;searchLink fieldCode=&quot;DE&quot; term=&quot;%22Microbial+mats%22&quot;&gt;Microbial mats&lt;/searchLink&gt;&lt;br /&gt;*&lt;searchLink fieldCode=&quot;DE&quot; term=&quot;%22Paleoenvironmental+studies%22&quot;&gt;Paleoenvironmental studies&lt;/searchLink&gt;&lt;br /&gt;*&lt;searchLink fieldCode=&quot;DE&quot; term=&quot;%22Petrology%22&quot;&gt;Petrology&lt;/searchLink&gt;&lt;br /&gt;*&lt;searchLink fieldCode=&quot;DE&quot; term=&quot;%22Peninsulas%22&quot;&gt;Peninsulas&lt;/searchLink&gt;&lt;br /&gt;*&lt;searchLink fieldCode=&quot;DE&quot; term=&quot;%22Computed+tomography%22&quot;&gt;Computed tomography&lt;/searchLink&gt;&lt;br /&gt;*&lt;searchLink fieldCode=&quot;DE&quot; term=&quot;%22Sedimentation+%26+deposition%22&quot;&gt;Sedimentation &amp; deposition&lt;/searchLink&gt;
– Name: SubjectGeographic
  Label: Geographic Terms
  Group: Su
  Data: &lt;searchLink fieldCode=&quot;DE&quot; term=&quot;%22Iberian+Peninsula%22&quot;&gt;Iberian Peninsula&lt;/searchLink&gt;
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Microbial mats and microbialites are common in modern and ancient saline lacustrine environments and are highly responsive to biological and environmental factors. As such, they represent important sources of high‐resolution environmental data across a wide range of geological time. Nonetheless, interpretation of fossil mats is non‐trivial due to the variable combinations of intrinsic and extrinsic controls, diagenetic modification, preservation and complex morphological characteristics. This study combines X‐ray computed tomography (CT) scans with high‐resolution morphological and petrographic analyses of Holocene microbial mats from several lacustrine sites in the Iberian Peninsula to determine relationships between microbialite morphology, texture and environmental controls. Modern and subrecent mats (&lt;0.2 ka BP) occur in Laguna Salada de Chiprana and saline Laguna Z&#243;&#241;ar, whereas older Holocene mats (~0.2 to 10 ka BP) were sampled from saline Lago de Arreo and brackish‐saline Lago de Estanya. All studied mats developed preferentially during periods of low lake levels, reduced sediment input and elevated water salinity, although various combinations of these factors can operate in individual lakes and at different times. Environmental factors (e.g. water chemistry, light, mineral precipitation) and community composition are additional controls acting in individual lakes. Domical and undulatory mats accreted relatively rapidly during periods of low detrital sedimentation rates. The generally flatter microbialite morphologies and higher abundance of grains within microbialites from lakes Arreo and Estanya reflect elevated detrital input. Endogenic mineral phases such as gypsum further promote domical, columnar and pseudo‐dendritic mat structures. Formation of columns and conical tufts in littoral settings of Laguna Salada de Chiprana is a response to gradients of light, oxygenation and concomitant community change between photosynthesisers, green and red sulphur bacteria in littoral settings and sulphate reducers in profundal environments. The controls over microbialite characteristics recognised in this study span a range of depositional settings and timescales and underpin the effective use of microbialites in palaeoenvironmental reconstruction. [ABSTRACT FROM AUTHOR]
PLink https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=enr&AN=194450294
RecordInfo BibRecord:
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    Identifiers:
      – Type: doi
        Value: 10.1111/sed.70097
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 37
        StartPage: 1148
    Subjects:
      – SubjectFull: Microbial mats
        Type: general
      – SubjectFull: Paleoenvironmental studies
        Type: general
      – SubjectFull: Petrology
        Type: general
      – SubjectFull: Peninsulas
        Type: general
      – SubjectFull: Computed tomography
        Type: general
      – SubjectFull: Sedimentation & deposition
        Type: general
      – SubjectFull: Iberian Peninsula
        Type: general
    Titles:
      – TitleFull: Development of Holocene lacustrine microbialites on the Iberian Peninsula: Insights into environmental and depositional controls using X‐ray CT and petrography.
        Type: main
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      – PersonEntity:
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            NameFull: Doyle, Connor
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            NameFull: Corella, Juan Pablo
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            NameFull: Behnsen, Julia
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            NameFull: Morellón, Mario
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            NameFull: Martín‐Puertas, Celia
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            NameFull: Garcés, Blas Valero
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            NameFull: Schröder, Stefan
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            – D: 01
              M: 06
              Text: Jun2026
              Type: published
              Y: 2026
          Identifiers:
            – Type: issn-print
              Value: 00370746
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              Value: 73
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              Value: 4
          Titles:
            – TitleFull: Sedimentology
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