{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,1,31]],"date-time":"2026-01-31T08:24:01Z","timestamp":1769847841600,"version":"3.49.0"},"reference-count":24,"publisher":"Geological Society of London","issue":"4","license":[{"start":{"date-parts":[[2004,7,1]],"date-time":"2004-07-01T00:00:00Z","timestamp":1088640000000},"content-version":"stm-asf","delay-in-days":0,"URL":"https:\/\/doi.org\/10.15223\/policy-002"}],"content-domain":{"domain":["www.lyellcollection.org"],"crossmark-restriction":true},"short-container-title":["JGS"],"published-print":{"date-parts":[[2004,7]]},"abstract":"<jats:p>\n            Bulk geochemical data from the NERC Rapid Global Geological Events project are used to appraise the pattern of variation in mean organic content through the\n            <jats:italic>cymodoce<\/jats:italic>\n            to\n            <jats:italic>rotunda<\/jats:italic>\n            zones of the type Kimmeridge Clay Formation in southern Dorset. There is a symmetrical stratigraphic pattern in mean and modal total organic carbon (TOC) values, which increase from 1\u20132% at the top and base to a peak of 8\u20139% in the middle of the formation. To remove distortion caused by the strong positive skewness of the TOC values, the mean TOC per zone was recalculated for the first mode of the TOC distribution only, and combined pragmatically with pyrolysis estimates of the reactive (marine) TOC fraction to derive marine TOC values; these also vary symmetrically from\n            <jats:italic>c<\/jats:italic>\n            . 0.5% to peak values of\n            <jats:italic>c<\/jats:italic>\n            . 5.0%. The mean TOC is negatively correlated with sedimentation rate, indicating that dilution is a significant controlling variable. Mean palaeoproductivity was assessed using modern marine sediment relationships between carbon burial efficiency, sedimentation rate (derived from RGGE cyclostratigraphic analyses), the likely dissolved oxygen range, and water depth. Best estimates of palaeoproductivity range from 40 to 150 g C m\n            <jats:sup>\u22122<\/jats:sup>\n            a\n            <jats:sup>\u22121<\/jats:sup>\n            (low to moderate by comparison with present-day shelves) and are positively but nonlinearly correlated with mean\n            <jats:italic>\u03b4<\/jats:italic>\n            <jats:sup>13<\/jats:sup>\n            C\n            <jats:sub>TOC<\/jats:sub>\n            values.\n          <\/jats:p>","DOI":"10.1144\/0016-764903-078","type":"journal-article","created":{"date-parts":[[2007,12,21]],"date-time":"2007-12-21T18:15:25Z","timestamp":1198260925000},"page":"667-673","update-policy":"https:\/\/doi.org\/10.1144\/crossmark-policy","source":"Crossref","is-referenced-by-count":23,"title":["Variation in marine total organic carbon through the type Kimmeridge Clay Formation (Late Jurassic), Dorset, UK"],"prefix":"10.1144","volume":"161","author":[{"given":"Richard V.","family":"Tyson","sequence":"first","affiliation":[{"name":"School of Civil Engineering and Geosciences, Drummond Building, University of Newcastle, Newcastle upon Tyne NE1 7RU, UK (e-mail: r.v.tyson@ncl.ac.uk)"}]}],"member":"1881","published-online":{"date-parts":[[2022,6,6]]},"reference":[{"key":"e_1_3_2_1_1","doi-asserted-by":"publisher","DOI":"10.1016\/0031-0182(91)90178-T"},{"key":"e_1_3_2_2_1","doi-asserted-by":"publisher","DOI":"10.1016\/S0264-8172(96)00050-5"},{"key":"e_1_3_2_3_1","doi-asserted-by":"publisher","DOI":"10.1016\/0198-0149(89)90022-8"},{"key":"e_1_3_2_4_1","doi-asserted-by":"publisher","DOI":"10.1016\/S0146-6380(98)00189-2"},{"key":"e_1_3_2_5_1","unstructured":"Cox B.M. & Gallois R.W. 1981. The Stratigraphy of the Kimmeridge Clay of the Dorset Type Area and its Correlation with some other Kimmeridgian Sequences . Report of the Institute of Geological Sciences 80\/4 ."},{"key":"e_1_3_2_6_1","first-page":"1179","volume":"64","year":"1980","unstructured":"Demaison, G. & Moore, G.T. 1980. Anoxic environments and oil source bed genesis. AAPG Bulletin, 64, 1179\u20131209.","journal-title":"AAPG Bulletin"},{"key":"e_1_3_2_7_1","first-page":"299","volume":"19","year":"1994","unstructured":"Halpern, H.I. & Cole, G.A. 1994. An explanation for the positive organic carbon intercepts on Rock-Eval S2 versus TOC plots\u2014an example from Saudi Arabia. Arabian Journal for Science and Engineering, 19, 299\u2013307.","journal-title":"Arabian Journal for Science and Engineering"},{"key":"e_1_3_2_8_1","doi-asserted-by":"publisher","DOI":"10.1038\/315721a0"},{"key":"e_1_3_2_9_1","doi-asserted-by":"publisher","DOI":"10.1016\/0264-8172(93)90062-W"},{"key":"e_1_3_2_10_1","first-page":"799","volume":"74","year":"1990","unstructured":"Langford, F.F., Blanc-Valleron, M.-M. 1990. Interpreting Rock-Eval pyrolysis data using graphs of pyrolizable hydrocarbons vs. total organic carbon. AAPG Bulletin, 74, 799\u2013804.","journal-title":"AAPG Bulletin"},{"key":"e_1_3_2_11_1","first-page":"511","volume":"38","year":"2001","unstructured":"Morgans-Bell, H., Coe, A.L., Hesselbo, S.P. , et al., 2001. Integrated stratigraphy of the Kimmeridge Clay Formation (Upper Jurassic) based on exposures and boreholes in south Dorset UK. Geological Magazine, 38, 511\u2013539.","journal-title":"Geological Magazine"},{"key":"e_1_3_2_12_1","unstructured":"N\u00f8hr-Hansen H. 1989. Visual and chemical kerogen analyses of the Lower Kimmeridge Clay Westbury England. In: Batten D.J. & Keen M.C. (eds) Northwest European Micropalaeontology and Palynology . British Micropalaeontological Society Series 118\u2013131."},{"key":"e_1_3_2_13_1","doi-asserted-by":"publisher","DOI":"10.1016\/S0264-8172(01)00006-X"},{"key":"e_1_3_2_14_1","unstructured":"Tyson R.V. 1989. Late Jurassic palynofacies trends Piper and Kimmeridge Clay Formations UK onshore and northern North Sea. In: Batten D.J. & Keen M.C. (eds) Northwest European Micropalaeontology and Palynology . British Micropalaeontological Society Series 135\u2013172."},{"key":"e_1_3_2_15_1","doi-asserted-by":"crossref","unstructured":"Tyson R.V. 1995. Sedimentary Organic Matter: Organic Facies and Palynofacies . Chapman & Hall London.","DOI":"10.1007\/978-94-011-0739-6"},{"key":"e_1_3_2_16_1","doi-asserted-by":"crossref","unstructured":"Tyson R.V. 1996. Sequence stratigraphical interpretation of organic facies variations in marine siliciclastic systems: general principles and application to the onshore Kimmeridge Clay Formation UK. In: Hesselbo S. & Parkinson N. (eds) Sequence Stratigraphy in British Geology . Geological Society London Special Publications 103 75\u201396.","DOI":"10.1144\/GSL.SP.1996.103.01.06"},{"key":"e_1_3_2_17_1","doi-asserted-by":"publisher","DOI":"10.1016\/S0146-6380(00)00161-3"},{"key":"e_1_3_2_18_1","unstructured":"Tyson R.V. 2004. The."},{"key":"e_1_3_2_19_1","doi-asserted-by":"publisher","DOI":"10.1038\/277377a0"},{"key":"e_1_3_2_20_1","doi-asserted-by":"publisher","DOI":"10.1016\/S0016-7037(98)00231-2"},{"key":"e_1_3_2_21_1","unstructured":"Walsh J.J. 1988. On the Nature of Continental Shelves . Academic Press San Diego."},{"key":"e_1_3_2_22_1","doi-asserted-by":"publisher","DOI":"10.1098\/rsta.1999.0401"},{"key":"e_1_3_2_23_1","first-page":"659","volume":"161","year":"2004","unstructured":"Weedon, G.P., Coe, A.L. & Gallois, R.W. 2004. Cyclostratigraphy, orbital tuning and inferred productivity for the type Kimmeridge Clay (Late Jurassic), Southern England. Journal of the Geological Society, London, 161, 659\u2013670.","journal-title":"Journal of the Geological Society, London"},{"key":"e_1_3_2_24_1","doi-asserted-by":"publisher","DOI":"10.1144\/gsjgs.147.2.0365"}],"container-title":["Journal of the Geological Society"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.lyellcollection.org\/doi\/pdf\/10.1144\/0016-764903-078","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2024,11,19]],"date-time":"2024-11-19T11:23:51Z","timestamp":1732015431000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.lyellcollection.org\/doi\/10.1144\/0016-764903-078"},"secondary":[{"URL":"https:\/\/geoscienceworld.org\/jgs\/article-lookup?doi=10.1144\/0016-764903-078","label":"geoscienceworld"}]},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2004,7]]},"references-count":24,"journal-issue":{"issue":"4","published-online":{"date-parts":[[2022,6,6]]},"published-print":{"date-parts":[[2004,7]]}},"alternative-id":["10.1144\/0016-764903-078"],"URL":"https:\/\/doi.org\/10.1144\/0016-764903-078","relation":{},"ISSN":["0016-7649","2041-479X"],"issn-type":[{"value":"0016-7649","type":"print"},{"value":"2041-479X","type":"electronic"}],"subject":[],"published":{"date-parts":[[2004,7]]},"assertion":[{"value":"2003-05-15","order":0,"name":"received","label":"Received","group":{"name":"publication_history","label":"Publication History"}},{"value":"2003-11-11","order":2,"name":"accepted","label":"Accepted","group":{"name":"publication_history","label":"Publication History"}},{"value":"2022-06-06","order":3,"name":"published","label":"Published","group":{"name":"publication_history","label":"Publication History"}}]}}