Large-Field Electron Imaging and X‑ray Elemental Mapping Unveil the Morphology, Structure, and Fractal Features of a Cretaceous Fossil at the Centimeter Scale
We used here a scanning electron microscopy approach that detected backscattered electrons (BSEs) and X-rays (from ionization processes) along a large-field (LF) scan, applied on a Cretaceous fossil of a shrimp (area ∼280 mm2) from the Araripe Sedimentary Basin. High-definition LF images from BSEs a...
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| Veröffentlicht in: | Analytical chemistry (Washington) 2015-10, Vol.87 (19), p.10088-10095 |
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| creator | Oliveira, Naiara C. Silva, João H. Barros, Olga A. Pinheiro, Allysson P. Santana, William Saraiva, Antônio A. F. Ferreira, Odair P. Freire, Paulo T. C. Paula, Amauri J. |
| description | We used here a scanning electron microscopy approach that detected backscattered electrons (BSEs) and X-rays (from ionization processes) along a large-field (LF) scan, applied on a Cretaceous fossil of a shrimp (area ∼280 mm2) from the Araripe Sedimentary Basin. High-definition LF images from BSEs and X-rays were essentially generated by assembling thousands of magnified images that covered the whole area of the fossil, thus unveiling morphological and compositional aspects at length scales from micrometers to centimeters. Morphological features of the shrimp such as pleopods, pereopods, and antennae located at near-surface layers (undetected by photography techniques) were unveiled in detail by LF BSE images and in calcium and phosphorus elemental maps (mineralized as hydroxyapatite). LF elemental maps for zinc and sulfur indicated a rare fossilization event observed for the first time in fossils from the Araripe Sedimentary Basin: the mineralization of zinc sulfide interfacing to hydroxyapatite in the fossil. Finally, a dimensional analysis of the phosphorus map led to an important finding: the existence of a fractal characteristic (D = 1.63) for the hydroxyapatite–matrix interface, a result of physical-geological events occurring with spatial scale invariance on the specimen, over millions of years. |
| doi_str_mv | 10.1021/acs.analchem.5b02815 |
| format | Article |
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Morphological features of the shrimp such as pleopods, pereopods, and antennae located at near-surface layers (undetected by photography techniques) were unveiled in detail by LF BSE images and in calcium and phosphorus elemental maps (mineralized as hydroxyapatite). LF elemental maps for zinc and sulfur indicated a rare fossilization event observed for the first time in fossils from the Araripe Sedimentary Basin: the mineralization of zinc sulfide interfacing to hydroxyapatite in the fossil. Finally, a dimensional analysis of the phosphorus map led to an important finding: the existence of a fractal characteristic (D = 1.63) for the hydroxyapatite–matrix interface, a result of physical-geological events occurring with spatial scale invariance on the specimen, over millions of years.</description><identifier>ISSN: 0003-2700</identifier><identifier>EISSN: 1520-6882</identifier><identifier>DOI: 10.1021/acs.analchem.5b02815</identifier><identifier>PMID: 26344658</identifier><identifier>CODEN: ANCHAM</identifier><language>eng</language><publisher>United States: American Chemical Society</publisher><subject>Animals ; Basins ; Decapoda (Crustacea) - anatomy & histology ; Decapoda (Crustacea) - chemistry ; Durapatite - analysis ; Electrons ; Fossils ; Fossils - anatomy & histology ; Fractal analysis ; Hydroxyapatite ; Microscopy, Electron, Scanning - methods ; Mineralization ; Morphology ; Phosphorus - analysis ; Shellfish ; Shrimps ; Spectrometry, X-Ray Emission - methods ; X-Rays</subject><ispartof>Analytical chemistry (Washington), 2015-10, Vol.87 (19), p.10088-10095</ispartof><rights>Copyright © 2015 American Chemical Society</rights><rights>Copyright American Chemical Society Oct 6, 2015</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-a409t-db9d2b4dcb1ea2be43796994531da97ac52b71d6288919d410a2e9f2754679473</citedby><cites>FETCH-LOGICAL-a409t-db9d2b4dcb1ea2be43796994531da97ac52b71d6288919d410a2e9f2754679473</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://pubs.acs.org/doi/pdf/10.1021/acs.analchem.5b02815$$EPDF$$P50$$Gacs$$H</linktopdf><linktohtml>$$Uhttps://pubs.acs.org/doi/10.1021/acs.analchem.5b02815$$EHTML$$P50$$Gacs$$H</linktohtml><link.rule.ids>314,780,784,2765,27076,27924,27925,56738,56788</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/26344658$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Oliveira, Naiara C.</creatorcontrib><creatorcontrib>Silva, João H.</creatorcontrib><creatorcontrib>Barros, Olga A.</creatorcontrib><creatorcontrib>Pinheiro, Allysson P.</creatorcontrib><creatorcontrib>Santana, William</creatorcontrib><creatorcontrib>Saraiva, Antônio A. F.</creatorcontrib><creatorcontrib>Ferreira, Odair P.</creatorcontrib><creatorcontrib>Freire, Paulo T. C.</creatorcontrib><creatorcontrib>Paula, Amauri J.</creatorcontrib><title>Large-Field Electron Imaging and X‑ray Elemental Mapping Unveil the Morphology, Structure, and Fractal Features of a Cretaceous Fossil at the Centimeter Scale</title><title>Analytical chemistry (Washington)</title><addtitle>Anal. Chem</addtitle><description>We used here a scanning electron microscopy approach that detected backscattered electrons (BSEs) and X-rays (from ionization processes) along a large-field (LF) scan, applied on a Cretaceous fossil of a shrimp (area ∼280 mm2) from the Araripe Sedimentary Basin. High-definition LF images from BSEs and X-rays were essentially generated by assembling thousands of magnified images that covered the whole area of the fossil, thus unveiling morphological and compositional aspects at length scales from micrometers to centimeters. Morphological features of the shrimp such as pleopods, pereopods, and antennae located at near-surface layers (undetected by photography techniques) were unveiled in detail by LF BSE images and in calcium and phosphorus elemental maps (mineralized as hydroxyapatite). LF elemental maps for zinc and sulfur indicated a rare fossilization event observed for the first time in fossils from the Araripe Sedimentary Basin: the mineralization of zinc sulfide interfacing to hydroxyapatite in the fossil. Finally, a dimensional analysis of the phosphorus map led to an important finding: the existence of a fractal characteristic (D = 1.63) for the hydroxyapatite–matrix interface, a result of physical-geological events occurring with spatial scale invariance on the specimen, over millions of years.</description><subject>Animals</subject><subject>Basins</subject><subject>Decapoda (Crustacea) - anatomy & histology</subject><subject>Decapoda (Crustacea) - chemistry</subject><subject>Durapatite - analysis</subject><subject>Electrons</subject><subject>Fossils</subject><subject>Fossils - anatomy & histology</subject><subject>Fractal analysis</subject><subject>Hydroxyapatite</subject><subject>Microscopy, Electron, Scanning - methods</subject><subject>Mineralization</subject><subject>Morphology</subject><subject>Phosphorus - analysis</subject><subject>Shellfish</subject><subject>Shrimps</subject><subject>Spectrometry, X-Ray Emission - methods</subject><subject>X-Rays</subject><issn>0003-2700</issn><issn>1520-6882</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2015</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNqNkc1u1DAURi0EokPhDRCyxIZFM9iOE8dLNGqg0lRdlErsohvnzkwq5wfbQZpdX6FvwLPxJDidKUgsUFeWfM_3XcuHkLecLTkT_CMYv4QerNlht8xqJgqePSMLngmW5EUhnpMFYyxNhGLshLzy_pYxzhnPX5ITkadS5lmxID_X4LaYlC3ahp5bNMENPb3oYNv2Wwp9Q7_9urt3sJ-HHfYBLL2EcZynN_0PbC0NO6SXgxt3gx22-zN6HdxkwuTw7CFfOjBzqkSYLz0dNhToymEAg8PkaTl4H2sgPDSt4o62w4COXhuw-Jq82ID1-OZ4npKb8vzr6kuyvvp8sfq0TkAyHZKm1o2oZWNqjiBqlKnSudYyS3kDWoHJRK14k4ui0Fw3kjMQqDdCZTJXWqr0lHw49I5u-D6hD1XXeoPWQj-_suIqF5wVafEUlMclqSpERN__g94Ok4vWZkpwHS2kaaTkgTIu_oXDTTW6tgO3rzirZtlVlF09yq6OsmPs3bF8qjts_oQe7UaAHYA5_nfx_zp_A67RuZ0</recordid><startdate>20151006</startdate><enddate>20151006</enddate><creator>Oliveira, Naiara C.</creator><creator>Silva, João H.</creator><creator>Barros, Olga A.</creator><creator>Pinheiro, Allysson P.</creator><creator>Santana, William</creator><creator>Saraiva, Antônio A. 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F.</au><au>Ferreira, Odair P.</au><au>Freire, Paulo T. C.</au><au>Paula, Amauri J.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Large-Field Electron Imaging and X‑ray Elemental Mapping Unveil the Morphology, Structure, and Fractal Features of a Cretaceous Fossil at the Centimeter Scale</atitle><jtitle>Analytical chemistry (Washington)</jtitle><addtitle>Anal. Chem</addtitle><date>2015-10-06</date><risdate>2015</risdate><volume>87</volume><issue>19</issue><spage>10088</spage><epage>10095</epage><pages>10088-10095</pages><issn>0003-2700</issn><eissn>1520-6882</eissn><coden>ANCHAM</coden><abstract>We used here a scanning electron microscopy approach that detected backscattered electrons (BSEs) and X-rays (from ionization processes) along a large-field (LF) scan, applied on a Cretaceous fossil of a shrimp (area ∼280 mm2) from the Araripe Sedimentary Basin. High-definition LF images from BSEs and X-rays were essentially generated by assembling thousands of magnified images that covered the whole area of the fossil, thus unveiling morphological and compositional aspects at length scales from micrometers to centimeters. Morphological features of the shrimp such as pleopods, pereopods, and antennae located at near-surface layers (undetected by photography techniques) were unveiled in detail by LF BSE images and in calcium and phosphorus elemental maps (mineralized as hydroxyapatite). LF elemental maps for zinc and sulfur indicated a rare fossilization event observed for the first time in fossils from the Araripe Sedimentary Basin: the mineralization of zinc sulfide interfacing to hydroxyapatite in the fossil. Finally, a dimensional analysis of the phosphorus map led to an important finding: the existence of a fractal characteristic (D = 1.63) for the hydroxyapatite–matrix interface, a result of physical-geological events occurring with spatial scale invariance on the specimen, over millions of years.</abstract><cop>United States</cop><pub>American Chemical Society</pub><pmid>26344658</pmid><doi>10.1021/acs.analchem.5b02815</doi><tpages>8</tpages></addata></record> |
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| subjects | Animals Basins Decapoda (Crustacea) - anatomy & histology Decapoda (Crustacea) - chemistry Durapatite - analysis Electrons Fossils Fossils - anatomy & histology Fractal analysis Hydroxyapatite Microscopy, Electron, Scanning - methods Mineralization Morphology Phosphorus - analysis Shellfish Shrimps Spectrometry, X-Ray Emission - methods X-Rays |
| title | Large-Field Electron Imaging and X‑ray Elemental Mapping Unveil the Morphology, Structure, and Fractal Features of a Cretaceous Fossil at the Centimeter Scale |
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