Carbon-isotope events across the Precambrian/Cambrian boundary on the Siberian Platform
Variations of marine isotopes with time have been observed through the Phanerozoic 1,2 , in association with some period boundaries: Pleistocene/Holocene 3 , Cretaceous/Tertiary 4 , Permo-Triassic 5,6 and Frasnian/Fammenian 7 . Most of these changes are associated with extinction events, reflecting...
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| Veröffentlicht in: | Nature (London) 1986-03, Vol.320 (6059), p.258-259 |
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| container_title | Nature (London) |
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| creator | Magaritz, Mordeckai Holser, William T Kirschvink, Joseph L |
| description | Variations of marine isotopes with time have been observed through the Phanerozoic
1,2
, in association with some period boundaries: Pleistocene/Holocene
3
, Cretaceous/Tertiary
4
, Permo-Triassic
5,6
and Frasnian/Fammenian
7
. Most of these changes are associated with extinction events, reflecting changes in life on Earth. One of the major biological changes in Earth's history occurred near the end of Proterozoic time, with widespread increase of bio-mineralization and the appearance of shelly fauna
8–10
. We present here an initial survey of carbon isotope ratios in a section on the Siberian Platform that spans the Proterozoic/Palaeozoic boundary. After a high of
δ
13
C = + 3.4‰, 15 m below the boundary,
δ
13
C drops sharply in two cycles across the boundary, to
δ
13
C = −2‰, near the end of the Tommotian Stage. These variations suggest an initial bloom of biomass in late Vendian time corresponding to the dramatic diversification that must have preceeded the widespread appearance of new taxa in the Cambrian fossil record. |
| doi_str_mv | 10.1038/320258a0 |
| format | Article |
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1,2
, in association with some period boundaries: Pleistocene/Holocene
3
, Cretaceous/Tertiary
4
, Permo-Triassic
5,6
and Frasnian/Fammenian
7
. Most of these changes are associated with extinction events, reflecting changes in life on Earth. One of the major biological changes in Earth's history occurred near the end of Proterozoic time, with widespread increase of bio-mineralization and the appearance of shelly fauna
8–10
. We present here an initial survey of carbon isotope ratios in a section on the Siberian Platform that spans the Proterozoic/Palaeozoic boundary. After a high of
δ
13
C = + 3.4‰, 15 m below the boundary,
δ
13
C drops sharply in two cycles across the boundary, to
δ
13
C = −2‰, near the end of the Tommotian Stage. These variations suggest an initial bloom of biomass in late Vendian time corresponding to the dramatic diversification that must have preceeded the widespread appearance of new taxa in the Cambrian fossil record.</description><identifier>ISSN: 0028-0836</identifier><identifier>EISSN: 1476-4687</identifier><identifier>DOI: 10.1038/320258a0</identifier><identifier>CODEN: NATUAS</identifier><language>eng</language><publisher>London: Nature Publishing Group UK</publisher><subject>Earth sciences ; Earth, ocean, space ; Exact sciences and technology ; Humanities and Social Sciences ; Isotope geochemistry ; Isotope geochemistry. Geochronology ; letter ; multidisciplinary ; Science ; Science (multidisciplinary)</subject><ispartof>Nature (London), 1986-03, Vol.320 (6059), p.258-259</ispartof><rights>Springer Nature Limited 1986</rights><rights>1986 INIST-CNRS</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-a400t-715f5c8e3e2bda5480f134b1e553d7cadbebf96bb057f6f948475b19105fbcb03</citedby><cites>FETCH-LOGICAL-a400t-715f5c8e3e2bda5480f134b1e553d7cadbebf96bb057f6f948475b19105fbcb03</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,780,784,2727,27924,27925</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=8662290$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>Magaritz, Mordeckai</creatorcontrib><creatorcontrib>Holser, William T</creatorcontrib><creatorcontrib>Kirschvink, Joseph L</creatorcontrib><title>Carbon-isotope events across the Precambrian/Cambrian boundary on the Siberian Platform</title><title>Nature (London)</title><addtitle>Nature</addtitle><description>Variations of marine isotopes with time have been observed through the Phanerozoic
1,2
, in association with some period boundaries: Pleistocene/Holocene
3
, Cretaceous/Tertiary
4
, Permo-Triassic
5,6
and Frasnian/Fammenian
7
. Most of these changes are associated with extinction events, reflecting changes in life on Earth. One of the major biological changes in Earth's history occurred near the end of Proterozoic time, with widespread increase of bio-mineralization and the appearance of shelly fauna
8–10
. We present here an initial survey of carbon isotope ratios in a section on the Siberian Platform that spans the Proterozoic/Palaeozoic boundary. After a high of
δ
13
C = + 3.4‰, 15 m below the boundary,
δ
13
C drops sharply in two cycles across the boundary, to
δ
13
C = −2‰, near the end of the Tommotian Stage. These variations suggest an initial bloom of biomass in late Vendian time corresponding to the dramatic diversification that must have preceeded the widespread appearance of new taxa in the Cambrian fossil record.</description><subject>Earth sciences</subject><subject>Earth, ocean, space</subject><subject>Exact sciences and technology</subject><subject>Humanities and Social Sciences</subject><subject>Isotope geochemistry</subject><subject>Isotope geochemistry. Geochronology</subject><subject>letter</subject><subject>multidisciplinary</subject><subject>Science</subject><subject>Science (multidisciplinary)</subject><issn>0028-0836</issn><issn>1476-4687</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1986</creationdate><recordtype>article</recordtype><recordid>eNpt0N9LwzAQB_AgCs4p-BdIH3zQh7pLmzTpo5T5AwYOVHwslzTRji0ZSSf439utc08-3cF9-HJ3hFxSuKOQy0meQcYlwhEZUSaKlBVSHJMRQCZTkHlxSs5iXAAAp4KNyEeFQXmXttF3fm0S821cFxPUwceYdF8mmQejcaVCi25S7ZtE-Y1rMPwk3u3Qa6vMbjBfYmd9WJ2TE4vLaC72dUzeH6Zv1VM6e3l8ru5nKTKALhWUW66lyU2mGuRMgqU5U9RwnjdCY6OMsmWhFHBhC1syyQRXtKTArdIK8jG5GXJ3Cwdj63VoV_1mNYV6-5D67yE9vR7oGqPGpQ3odBsPXhZFlpVbdjuw2E_cpwn1wm-C64_4L_JqsA67TTCHrAP4BbfNd8M</recordid><startdate>19860320</startdate><enddate>19860320</enddate><creator>Magaritz, Mordeckai</creator><creator>Holser, William T</creator><creator>Kirschvink, Joseph L</creator><general>Nature Publishing Group UK</general><general>Nature Publishing</general><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope></search><sort><creationdate>19860320</creationdate><title>Carbon-isotope events across the Precambrian/Cambrian boundary on the Siberian Platform</title><author>Magaritz, Mordeckai ; Holser, William T ; Kirschvink, Joseph L</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-a400t-715f5c8e3e2bda5480f134b1e553d7cadbebf96bb057f6f948475b19105fbcb03</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>1986</creationdate><topic>Earth sciences</topic><topic>Earth, ocean, space</topic><topic>Exact sciences and technology</topic><topic>Humanities and Social Sciences</topic><topic>Isotope geochemistry</topic><topic>Isotope geochemistry. Geochronology</topic><topic>letter</topic><topic>multidisciplinary</topic><topic>Science</topic><topic>Science (multidisciplinary)</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Magaritz, Mordeckai</creatorcontrib><creatorcontrib>Holser, William T</creatorcontrib><creatorcontrib>Kirschvink, Joseph L</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><jtitle>Nature (London)</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Magaritz, Mordeckai</au><au>Holser, William T</au><au>Kirschvink, Joseph L</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Carbon-isotope events across the Precambrian/Cambrian boundary on the Siberian Platform</atitle><jtitle>Nature (London)</jtitle><stitle>Nature</stitle><date>1986-03-20</date><risdate>1986</risdate><volume>320</volume><issue>6059</issue><spage>258</spage><epage>259</epage><pages>258-259</pages><issn>0028-0836</issn><eissn>1476-4687</eissn><coden>NATUAS</coden><abstract>Variations of marine isotopes with time have been observed through the Phanerozoic
1,2
, in association with some period boundaries: Pleistocene/Holocene
3
, Cretaceous/Tertiary
4
, Permo-Triassic
5,6
and Frasnian/Fammenian
7
. Most of these changes are associated with extinction events, reflecting changes in life on Earth. One of the major biological changes in Earth's history occurred near the end of Proterozoic time, with widespread increase of bio-mineralization and the appearance of shelly fauna
8–10
. We present here an initial survey of carbon isotope ratios in a section on the Siberian Platform that spans the Proterozoic/Palaeozoic boundary. After a high of
δ
13
C = + 3.4‰, 15 m below the boundary,
δ
13
C drops sharply in two cycles across the boundary, to
δ
13
C = −2‰, near the end of the Tommotian Stage. These variations suggest an initial bloom of biomass in late Vendian time corresponding to the dramatic diversification that must have preceeded the widespread appearance of new taxa in the Cambrian fossil record.</abstract><cop>London</cop><pub>Nature Publishing Group UK</pub><doi>10.1038/320258a0</doi><tpages>2</tpages></addata></record> |
| fulltext | fulltext |
| identifier | ISSN: 0028-0836 |
| ispartof | Nature (London), 1986-03, Vol.320 (6059), p.258-259 |
| issn | 0028-0836 1476-4687 |
| language | eng |
| recordid | cdi_crossref_primary_10_1038_320258a0 |
| source | Nature; Alma/SFX Local Collection |
| subjects | Earth sciences Earth, ocean, space Exact sciences and technology Humanities and Social Sciences Isotope geochemistry Isotope geochemistry. Geochronology letter multidisciplinary Science Science (multidisciplinary) |
| title | Carbon-isotope events across the Precambrian/Cambrian boundary on the Siberian Platform |
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