Palaeoenvironmental conditions during deposition of the Upper Cretaceous oil shale sequences in the Songliao Basin (NE China): Implications from geochemical analysis
► Paleoenvironmental changes during deposition of oil shales investigated. ► Salinity stratification of the water column reconstructed. ► Anoxic cycles during Late Cretaceous outlined. ► Sources of organic matter discussed. Excellent hydrocarbon source rocks (oil shales), containing Type I organic m...
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| Veröffentlicht in: | Organic geochemistry 2012-05, Vol.46, p.76-95 |
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| creator | Bechtel, Achim Jia, Jianliang Strobl, Susanne A.I. Sachsenhofer, Reinhard F. Liu, Zhaojun Gratzer, Reinhard Püttmann, Wilhelm |
| description | ► Paleoenvironmental changes during deposition of oil shales investigated. ► Salinity stratification of the water column reconstructed. ► Anoxic cycles during Late Cretaceous outlined. ► Sources of organic matter discussed.
Excellent hydrocarbon source rocks (oil shales), containing Type I organic matter (OM), were deposited in the continental Songliao rift basin during the Late Cretaceous. A major contribution of aquatic organisms (dinoflagellates, green algae, botryococcus) and minor input from macrophytes and land plants to OM accumulation is indicated by n-alkane distribution, steroid composition and δ13C values of individual biomarkers. Microbial communities included heterotrophic bacteria, cyanobacteria and chemoautotrophic bacteria, as well as purple and green sulfur bacteria. The presence of methanotrophic bacteria is indicated by 13C-depleted methyl hopane. The sediments were deposited in a eutrophic, alkaline palaeolake. Highly reducing (saline) bottom water conditions and a stratified water column existed during OM accumulation of the Qingshankou Formation and Member 1 of the Nenjiang Formation. This is indicated by low pristane/phytane, gammacerane index and MTTC ratios, and the presence of β-carotane and aryl isoprenoids. However, an abrupt change in environmental conditions during deposition of Member 2 of the Nenjiang Formation is indicated by significant changes in salinity and redox-sensitive biomarker ratios. A freshwater environment and suboxic conditions in the deep water prevailed during this period. Higher input of terrigenous OM occurred during deposition of the upper Nenjiang Formation.
Good oil-to-source rock correlation was obtained using biomarker fingerprints of oil-stained sandstone from the Quantou Formation and oil shales from the Qingshankou Formation. Based on the extent of isomerisation of C31 hopanes, the oil was most probably derived from oil shales of the Qingshankou Formation in deeper parts of the basin. |
| doi_str_mv | 10.1016/j.orggeochem.2012.02.003 |
| format | Article |
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Excellent hydrocarbon source rocks (oil shales), containing Type I organic matter (OM), were deposited in the continental Songliao rift basin during the Late Cretaceous. A major contribution of aquatic organisms (dinoflagellates, green algae, botryococcus) and minor input from macrophytes and land plants to OM accumulation is indicated by n-alkane distribution, steroid composition and δ13C values of individual biomarkers. Microbial communities included heterotrophic bacteria, cyanobacteria and chemoautotrophic bacteria, as well as purple and green sulfur bacteria. The presence of methanotrophic bacteria is indicated by 13C-depleted methyl hopane. The sediments were deposited in a eutrophic, alkaline palaeolake. Highly reducing (saline) bottom water conditions and a stratified water column existed during OM accumulation of the Qingshankou Formation and Member 1 of the Nenjiang Formation. This is indicated by low pristane/phytane, gammacerane index and MTTC ratios, and the presence of β-carotane and aryl isoprenoids. However, an abrupt change in environmental conditions during deposition of Member 2 of the Nenjiang Formation is indicated by significant changes in salinity and redox-sensitive biomarker ratios. A freshwater environment and suboxic conditions in the deep water prevailed during this period. Higher input of terrigenous OM occurred during deposition of the upper Nenjiang Formation.
Good oil-to-source rock correlation was obtained using biomarker fingerprints of oil-stained sandstone from the Quantou Formation and oil shales from the Qingshankou Formation. Based on the extent of isomerisation of C31 hopanes, the oil was most probably derived from oil shales of the Qingshankou Formation in deeper parts of the basin.</description><identifier>ISSN: 0146-6380</identifier><identifier>EISSN: 1873-5290</identifier><identifier>DOI: 10.1016/j.orggeochem.2012.02.003</identifier><language>eng</language><publisher>Oxford: Elsevier Ltd</publisher><subject>alkanes ; bacteria ; biomarkers ; Botryococcus ; Cyanobacteria ; Dinophyceae ; Earth sciences ; Earth, ocean, space ; embryophytes ; environmental factors ; Exact sciences and technology ; freshwater ; Green sulfur bacteria ; Hydrocarbons ; isomerization ; isoprenoids ; Isotope geochemistry ; Isotope geochemistry. Geochronology ; macrophytes ; methanotrophs ; microbial communities ; oil shale ; oils ; organic matter ; salinity ; sandstone ; sediment deposition ; Sedimentary rocks ; Stratigraphy</subject><ispartof>Organic geochemistry, 2012-05, Vol.46, p.76-95</ispartof><rights>2012 Elsevier Ltd</rights><rights>2015 INIST-CNRS</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-a494t-d9863fb78b2a8f8a9775b03e7f5988b59e80b2b6375b54ed8c2f88fc1f05695e3</citedby><cites>FETCH-LOGICAL-a494t-d9863fb78b2a8f8a9775b03e7f5988b59e80b2b6375b54ed8c2f88fc1f05695e3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://dx.doi.org/10.1016/j.orggeochem.2012.02.003$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,780,784,3550,27924,27925,45995</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=25821445$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>Bechtel, Achim</creatorcontrib><creatorcontrib>Jia, Jianliang</creatorcontrib><creatorcontrib>Strobl, Susanne A.I.</creatorcontrib><creatorcontrib>Sachsenhofer, Reinhard F.</creatorcontrib><creatorcontrib>Liu, Zhaojun</creatorcontrib><creatorcontrib>Gratzer, Reinhard</creatorcontrib><creatorcontrib>Püttmann, Wilhelm</creatorcontrib><title>Palaeoenvironmental conditions during deposition of the Upper Cretaceous oil shale sequences in the Songliao Basin (NE China): Implications from geochemical analysis</title><title>Organic geochemistry</title><description>► Paleoenvironmental changes during deposition of oil shales investigated. ► Salinity stratification of the water column reconstructed. ► Anoxic cycles during Late Cretaceous outlined. ► Sources of organic matter discussed.
Excellent hydrocarbon source rocks (oil shales), containing Type I organic matter (OM), were deposited in the continental Songliao rift basin during the Late Cretaceous. A major contribution of aquatic organisms (dinoflagellates, green algae, botryococcus) and minor input from macrophytes and land plants to OM accumulation is indicated by n-alkane distribution, steroid composition and δ13C values of individual biomarkers. Microbial communities included heterotrophic bacteria, cyanobacteria and chemoautotrophic bacteria, as well as purple and green sulfur bacteria. The presence of methanotrophic bacteria is indicated by 13C-depleted methyl hopane. The sediments were deposited in a eutrophic, alkaline palaeolake. Highly reducing (saline) bottom water conditions and a stratified water column existed during OM accumulation of the Qingshankou Formation and Member 1 of the Nenjiang Formation. This is indicated by low pristane/phytane, gammacerane index and MTTC ratios, and the presence of β-carotane and aryl isoprenoids. However, an abrupt change in environmental conditions during deposition of Member 2 of the Nenjiang Formation is indicated by significant changes in salinity and redox-sensitive biomarker ratios. A freshwater environment and suboxic conditions in the deep water prevailed during this period. Higher input of terrigenous OM occurred during deposition of the upper Nenjiang Formation.
Good oil-to-source rock correlation was obtained using biomarker fingerprints of oil-stained sandstone from the Quantou Formation and oil shales from the Qingshankou Formation. Based on the extent of isomerisation of C31 hopanes, the oil was most probably derived from oil shales of the Qingshankou Formation in deeper parts of the basin.</description><subject>alkanes</subject><subject>bacteria</subject><subject>biomarkers</subject><subject>Botryococcus</subject><subject>Cyanobacteria</subject><subject>Dinophyceae</subject><subject>Earth sciences</subject><subject>Earth, ocean, space</subject><subject>embryophytes</subject><subject>environmental factors</subject><subject>Exact sciences and technology</subject><subject>freshwater</subject><subject>Green sulfur bacteria</subject><subject>Hydrocarbons</subject><subject>isomerization</subject><subject>isoprenoids</subject><subject>Isotope geochemistry</subject><subject>Isotope geochemistry. Geochronology</subject><subject>macrophytes</subject><subject>methanotrophs</subject><subject>microbial communities</subject><subject>oil shale</subject><subject>oils</subject><subject>organic matter</subject><subject>salinity</subject><subject>sandstone</subject><subject>sediment deposition</subject><subject>Sedimentary rocks</subject><subject>Stratigraphy</subject><issn>0146-6380</issn><issn>1873-5290</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2012</creationdate><recordtype>article</recordtype><recordid>eNqFkcFq3DAQhk1podu0z1BdCunBG8m2bKm3ZknbQGgL6Z7FWB7tapElV_IG8kB9z2rjJT0WBgQ_38zon78oCKNrRll7dViHuNth0Hsc1xVl1ZrmovWLYsVEV5e8kvRlsaKsacu2FvR18SalA6WsYw1dFX9-ggMM6B9sDH5EP4MjOvjBzjb4RIZjtH5HBpxCepJIMGTeI9lOE0ayiTiDxnBMJFhH0h4ckoS_j-g1JmL9E3sf_M5ZCOQaUpYuv9-Qzd56-PiJ3I6TsxqWZSaGkZy9ZNER8OAek01vi1cGXMJ35_ei2H65-bX5Vt79-Hq7-XxXQiObuRykaGvTd6KvQBgBsut4T2vsDJdC9FyioH3Vt3WWeYOD0JURwmhmKG8lx_qiuFzmTjFkD2lWo00anQN_8qgYbSWTNRMyo2JBdQwpRTRqinaE-JghdUpGHdS_ZNQpGUVz0Tq3fjhvgZRdmghe2_TcX3FRsabhmXu_cAaCgl3MzPY-D-I5PdkxITJxvRCYj_JgMaqk7en0g42oZzUE-__v_AVDWrYF</recordid><startdate>20120501</startdate><enddate>20120501</enddate><creator>Bechtel, Achim</creator><creator>Jia, Jianliang</creator><creator>Strobl, Susanne A.I.</creator><creator>Sachsenhofer, Reinhard F.</creator><creator>Liu, Zhaojun</creator><creator>Gratzer, Reinhard</creator><creator>Püttmann, Wilhelm</creator><general>Elsevier Ltd</general><general>Elsevier</general><scope>FBQ</scope><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7TN</scope><scope>F1W</scope><scope>H95</scope><scope>L.G</scope><scope>M7N</scope></search><sort><creationdate>20120501</creationdate><title>Palaeoenvironmental conditions during deposition of the Upper Cretaceous oil shale sequences in the Songliao Basin (NE China): Implications from geochemical analysis</title><author>Bechtel, Achim ; Jia, Jianliang ; Strobl, Susanne A.I. ; Sachsenhofer, Reinhard F. ; Liu, Zhaojun ; Gratzer, Reinhard ; Püttmann, Wilhelm</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-a494t-d9863fb78b2a8f8a9775b03e7f5988b59e80b2b6375b54ed8c2f88fc1f05695e3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2012</creationdate><topic>alkanes</topic><topic>bacteria</topic><topic>biomarkers</topic><topic>Botryococcus</topic><topic>Cyanobacteria</topic><topic>Dinophyceae</topic><topic>Earth sciences</topic><topic>Earth, ocean, space</topic><topic>embryophytes</topic><topic>environmental factors</topic><topic>Exact sciences and technology</topic><topic>freshwater</topic><topic>Green sulfur bacteria</topic><topic>Hydrocarbons</topic><topic>isomerization</topic><topic>isoprenoids</topic><topic>Isotope geochemistry</topic><topic>Isotope geochemistry. Geochronology</topic><topic>macrophytes</topic><topic>methanotrophs</topic><topic>microbial communities</topic><topic>oil shale</topic><topic>oils</topic><topic>organic matter</topic><topic>salinity</topic><topic>sandstone</topic><topic>sediment deposition</topic><topic>Sedimentary rocks</topic><topic>Stratigraphy</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Bechtel, Achim</creatorcontrib><creatorcontrib>Jia, Jianliang</creatorcontrib><creatorcontrib>Strobl, Susanne A.I.</creatorcontrib><creatorcontrib>Sachsenhofer, Reinhard F.</creatorcontrib><creatorcontrib>Liu, Zhaojun</creatorcontrib><creatorcontrib>Gratzer, Reinhard</creatorcontrib><creatorcontrib>Püttmann, Wilhelm</creatorcontrib><collection>AGRIS</collection><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>Oceanic Abstracts</collection><collection>ASFA: Aquatic Sciences and Fisheries Abstracts</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) 1: Biological Sciences & Living Resources</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) Professional</collection><collection>Algology Mycology and Protozoology Abstracts (Microbiology C)</collection><jtitle>Organic geochemistry</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Bechtel, Achim</au><au>Jia, Jianliang</au><au>Strobl, Susanne A.I.</au><au>Sachsenhofer, Reinhard F.</au><au>Liu, Zhaojun</au><au>Gratzer, Reinhard</au><au>Püttmann, Wilhelm</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Palaeoenvironmental conditions during deposition of the Upper Cretaceous oil shale sequences in the Songliao Basin (NE China): Implications from geochemical analysis</atitle><jtitle>Organic geochemistry</jtitle><date>2012-05-01</date><risdate>2012</risdate><volume>46</volume><spage>76</spage><epage>95</epage><pages>76-95</pages><issn>0146-6380</issn><eissn>1873-5290</eissn><abstract>► Paleoenvironmental changes during deposition of oil shales investigated. ► Salinity stratification of the water column reconstructed. ► Anoxic cycles during Late Cretaceous outlined. ► Sources of organic matter discussed.
Excellent hydrocarbon source rocks (oil shales), containing Type I organic matter (OM), were deposited in the continental Songliao rift basin during the Late Cretaceous. A major contribution of aquatic organisms (dinoflagellates, green algae, botryococcus) and minor input from macrophytes and land plants to OM accumulation is indicated by n-alkane distribution, steroid composition and δ13C values of individual biomarkers. Microbial communities included heterotrophic bacteria, cyanobacteria and chemoautotrophic bacteria, as well as purple and green sulfur bacteria. The presence of methanotrophic bacteria is indicated by 13C-depleted methyl hopane. The sediments were deposited in a eutrophic, alkaline palaeolake. Highly reducing (saline) bottom water conditions and a stratified water column existed during OM accumulation of the Qingshankou Formation and Member 1 of the Nenjiang Formation. This is indicated by low pristane/phytane, gammacerane index and MTTC ratios, and the presence of β-carotane and aryl isoprenoids. However, an abrupt change in environmental conditions during deposition of Member 2 of the Nenjiang Formation is indicated by significant changes in salinity and redox-sensitive biomarker ratios. A freshwater environment and suboxic conditions in the deep water prevailed during this period. Higher input of terrigenous OM occurred during deposition of the upper Nenjiang Formation.
Good oil-to-source rock correlation was obtained using biomarker fingerprints of oil-stained sandstone from the Quantou Formation and oil shales from the Qingshankou Formation. Based on the extent of isomerisation of C31 hopanes, the oil was most probably derived from oil shales of the Qingshankou Formation in deeper parts of the basin.</abstract><cop>Oxford</cop><pub>Elsevier Ltd</pub><doi>10.1016/j.orggeochem.2012.02.003</doi><tpages>20</tpages></addata></record> |
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| subjects | alkanes bacteria biomarkers Botryococcus Cyanobacteria Dinophyceae Earth sciences Earth, ocean, space embryophytes environmental factors Exact sciences and technology freshwater Green sulfur bacteria Hydrocarbons isomerization isoprenoids Isotope geochemistry Isotope geochemistry. Geochronology macrophytes methanotrophs microbial communities oil shale oils organic matter salinity sandstone sediment deposition Sedimentary rocks Stratigraphy |
| title | Palaeoenvironmental conditions during deposition of the Upper Cretaceous oil shale sequences in the Songliao Basin (NE China): Implications from geochemical analysis |
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