Organic matter origin and accumulation in tuffaceous shale of the lower Permian Lucaogou Formation, Jimsar Sag
The Jimsar Sag is an important shale oil exploration target area in the Junggar Basin, northwestern China. The lower Permian Lucaogou Formation, with a thickness of 200–300 m, is composed of thin tuffite, tuffaceous dolomite, mudstone and siltstone, and is the primary exploration target. A comprehen...
Ausführliche Beschreibung
Autor*in: |
Ding, Xiujian [verfasserIn] Qu, Jiangxiu [verfasserIn] Imin, Ablimit [verfasserIn] Zha, Ming [verfasserIn] Su, Yang [verfasserIn] Jiang, Zhongfa [verfasserIn] Jiang, Hang [verfasserIn] |
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Format: |
E-Artikel |
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Sprache: |
Englisch |
Erschienen: |
2019 |
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Schlagwörter: |
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Übergeordnetes Werk: |
Enthalten in: Journal of petroleum science and engineering - Amsterdam [u.a.] : Elsevier Science, 1987, 179, Seite 696-706 |
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Übergeordnetes Werk: |
volume:179 ; pages:696-706 |
DOI / URN: |
10.1016/j.petrol.2019.05.004 |
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Katalog-ID: |
ELV002373076 |
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520 | |a The Jimsar Sag is an important shale oil exploration target area in the Junggar Basin, northwestern China. The lower Permian Lucaogou Formation, with a thickness of 200–300 m, is composed of thin tuffite, tuffaceous dolomite, mudstone and siltstone, and is the primary exploration target. A comprehensive analysis is conducted on the bulk and molecular geochemical characteristics of the tuffaceous shale, to define the organic matter origin, depositional environment and organic matter accumulation. The key features of the tuffaceous shale extracts are short-to long-chain n-alkanes, a range of Pr/Ph ratio values (0.80–1.42), a relatively high content of C29 steranes and a moderate content of gammacerane, showing that the redox state ranged from oxic to anoxic and that the water salinity conditions varied from fresh to brackish. And the high content of cyanobacteria is the primary cause of the high abundance of β-carotane and C29 sterane. It appears that volcanic ash did not change the redox condition of depositional environment. Considering that volcanic ash-bearing sediments usually have relatively high β-carotane and C29 sterane content, and previous studies have pointed out that volcanic ash can stimulate phytoplankton and promote productivity in modern sediments, we could speculated volcanic ash may release mineral ions such as iron, and then stimulated cyanobacteria, which was the main cause of organic matter accumulation in the tuffaceous shale of the Jimsar Sag. | ||
650 | 4 | |a Tuffaceous shale | |
650 | 4 | |a Volcanic ash | |
650 | 4 | |a Organic matter origin | |
650 | 4 | |a Organic matter accumulation | |
650 | 4 | |a Lucaogou formation | |
700 | 1 | |a Qu, Jiangxiu |e verfasserin |4 aut | |
700 | 1 | |a Imin, Ablimit |e verfasserin |4 aut | |
700 | 1 | |a Zha, Ming |e verfasserin |4 aut | |
700 | 1 | |a Su, Yang |e verfasserin |4 aut | |
700 | 1 | |a Jiang, Zhongfa |e verfasserin |4 aut | |
700 | 1 | |a Jiang, Hang |e verfasserin |4 aut | |
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10.1016/j.petrol.2019.05.004 doi (DE-627)ELV002373076 (ELSEVIER)S0920-4105(19)30458-9 DE-627 ger DE-627 rda eng 660 DE-600 38.51 bkl 57.36 bkl Ding, Xiujian verfasserin aut Organic matter origin and accumulation in tuffaceous shale of the lower Permian Lucaogou Formation, Jimsar Sag 2019 nicht spezifiziert zzz rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier The Jimsar Sag is an important shale oil exploration target area in the Junggar Basin, northwestern China. The lower Permian Lucaogou Formation, with a thickness of 200–300 m, is composed of thin tuffite, tuffaceous dolomite, mudstone and siltstone, and is the primary exploration target. A comprehensive analysis is conducted on the bulk and molecular geochemical characteristics of the tuffaceous shale, to define the organic matter origin, depositional environment and organic matter accumulation. The key features of the tuffaceous shale extracts are short-to long-chain n-alkanes, a range of Pr/Ph ratio values (0.80–1.42), a relatively high content of C29 steranes and a moderate content of gammacerane, showing that the redox state ranged from oxic to anoxic and that the water salinity conditions varied from fresh to brackish. And the high content of cyanobacteria is the primary cause of the high abundance of β-carotane and C29 sterane. It appears that volcanic ash did not change the redox condition of depositional environment. Considering that volcanic ash-bearing sediments usually have relatively high β-carotane and C29 sterane content, and previous studies have pointed out that volcanic ash can stimulate phytoplankton and promote productivity in modern sediments, we could speculated volcanic ash may release mineral ions such as iron, and then stimulated cyanobacteria, which was the main cause of organic matter accumulation in the tuffaceous shale of the Jimsar Sag. Tuffaceous shale Volcanic ash Organic matter origin Organic matter accumulation Lucaogou formation Qu, Jiangxiu verfasserin aut Imin, Ablimit verfasserin aut Zha, Ming verfasserin aut Su, Yang verfasserin aut Jiang, Zhongfa verfasserin aut Jiang, Hang verfasserin aut Enthalten in Journal of petroleum science and engineering Amsterdam [u.a.] : Elsevier Science, 1987 179, Seite 696-706 Online-Ressource (DE-627)303393076 (DE-600)1494872-2 (DE-576)259484024 nnns volume:179 pages:696-706 GBV_USEFLAG_U SYSFLAG_U GBV_ELV SSG-OLC-PHA SSG-OPC-GGO GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_150 GBV_ILN_151 GBV_ILN_224 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2336 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4313 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4393 38.51 Geologie fossiler Brennstoffe 57.36 Erdölgewinnung Erdgasgewinnung AR 179 696-706 |
spelling |
10.1016/j.petrol.2019.05.004 doi (DE-627)ELV002373076 (ELSEVIER)S0920-4105(19)30458-9 DE-627 ger DE-627 rda eng 660 DE-600 38.51 bkl 57.36 bkl Ding, Xiujian verfasserin aut Organic matter origin and accumulation in tuffaceous shale of the lower Permian Lucaogou Formation, Jimsar Sag 2019 nicht spezifiziert zzz rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier The Jimsar Sag is an important shale oil exploration target area in the Junggar Basin, northwestern China. The lower Permian Lucaogou Formation, with a thickness of 200–300 m, is composed of thin tuffite, tuffaceous dolomite, mudstone and siltstone, and is the primary exploration target. A comprehensive analysis is conducted on the bulk and molecular geochemical characteristics of the tuffaceous shale, to define the organic matter origin, depositional environment and organic matter accumulation. The key features of the tuffaceous shale extracts are short-to long-chain n-alkanes, a range of Pr/Ph ratio values (0.80–1.42), a relatively high content of C29 steranes and a moderate content of gammacerane, showing that the redox state ranged from oxic to anoxic and that the water salinity conditions varied from fresh to brackish. And the high content of cyanobacteria is the primary cause of the high abundance of β-carotane and C29 sterane. It appears that volcanic ash did not change the redox condition of depositional environment. Considering that volcanic ash-bearing sediments usually have relatively high β-carotane and C29 sterane content, and previous studies have pointed out that volcanic ash can stimulate phytoplankton and promote productivity in modern sediments, we could speculated volcanic ash may release mineral ions such as iron, and then stimulated cyanobacteria, which was the main cause of organic matter accumulation in the tuffaceous shale of the Jimsar Sag. Tuffaceous shale Volcanic ash Organic matter origin Organic matter accumulation Lucaogou formation Qu, Jiangxiu verfasserin aut Imin, Ablimit verfasserin aut Zha, Ming verfasserin aut Su, Yang verfasserin aut Jiang, Zhongfa verfasserin aut Jiang, Hang verfasserin aut Enthalten in Journal of petroleum science and engineering Amsterdam [u.a.] : Elsevier Science, 1987 179, Seite 696-706 Online-Ressource (DE-627)303393076 (DE-600)1494872-2 (DE-576)259484024 nnns volume:179 pages:696-706 GBV_USEFLAG_U SYSFLAG_U GBV_ELV SSG-OLC-PHA SSG-OPC-GGO GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_150 GBV_ILN_151 GBV_ILN_224 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2336 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4313 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4393 38.51 Geologie fossiler Brennstoffe 57.36 Erdölgewinnung Erdgasgewinnung AR 179 696-706 |
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10.1016/j.petrol.2019.05.004 doi (DE-627)ELV002373076 (ELSEVIER)S0920-4105(19)30458-9 DE-627 ger DE-627 rda eng 660 DE-600 38.51 bkl 57.36 bkl Ding, Xiujian verfasserin aut Organic matter origin and accumulation in tuffaceous shale of the lower Permian Lucaogou Formation, Jimsar Sag 2019 nicht spezifiziert zzz rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier The Jimsar Sag is an important shale oil exploration target area in the Junggar Basin, northwestern China. The lower Permian Lucaogou Formation, with a thickness of 200–300 m, is composed of thin tuffite, tuffaceous dolomite, mudstone and siltstone, and is the primary exploration target. A comprehensive analysis is conducted on the bulk and molecular geochemical characteristics of the tuffaceous shale, to define the organic matter origin, depositional environment and organic matter accumulation. The key features of the tuffaceous shale extracts are short-to long-chain n-alkanes, a range of Pr/Ph ratio values (0.80–1.42), a relatively high content of C29 steranes and a moderate content of gammacerane, showing that the redox state ranged from oxic to anoxic and that the water salinity conditions varied from fresh to brackish. And the high content of cyanobacteria is the primary cause of the high abundance of β-carotane and C29 sterane. It appears that volcanic ash did not change the redox condition of depositional environment. Considering that volcanic ash-bearing sediments usually have relatively high β-carotane and C29 sterane content, and previous studies have pointed out that volcanic ash can stimulate phytoplankton and promote productivity in modern sediments, we could speculated volcanic ash may release mineral ions such as iron, and then stimulated cyanobacteria, which was the main cause of organic matter accumulation in the tuffaceous shale of the Jimsar Sag. Tuffaceous shale Volcanic ash Organic matter origin Organic matter accumulation Lucaogou formation Qu, Jiangxiu verfasserin aut Imin, Ablimit verfasserin aut Zha, Ming verfasserin aut Su, Yang verfasserin aut Jiang, Zhongfa verfasserin aut Jiang, Hang verfasserin aut Enthalten in Journal of petroleum science and engineering Amsterdam [u.a.] : Elsevier Science, 1987 179, Seite 696-706 Online-Ressource (DE-627)303393076 (DE-600)1494872-2 (DE-576)259484024 nnns volume:179 pages:696-706 GBV_USEFLAG_U SYSFLAG_U GBV_ELV SSG-OLC-PHA SSG-OPC-GGO GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_150 GBV_ILN_151 GBV_ILN_224 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2336 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4313 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4393 38.51 Geologie fossiler Brennstoffe 57.36 Erdölgewinnung Erdgasgewinnung AR 179 696-706 |
allfieldsGer |
10.1016/j.petrol.2019.05.004 doi (DE-627)ELV002373076 (ELSEVIER)S0920-4105(19)30458-9 DE-627 ger DE-627 rda eng 660 DE-600 38.51 bkl 57.36 bkl Ding, Xiujian verfasserin aut Organic matter origin and accumulation in tuffaceous shale of the lower Permian Lucaogou Formation, Jimsar Sag 2019 nicht spezifiziert zzz rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier The Jimsar Sag is an important shale oil exploration target area in the Junggar Basin, northwestern China. The lower Permian Lucaogou Formation, with a thickness of 200–300 m, is composed of thin tuffite, tuffaceous dolomite, mudstone and siltstone, and is the primary exploration target. A comprehensive analysis is conducted on the bulk and molecular geochemical characteristics of the tuffaceous shale, to define the organic matter origin, depositional environment and organic matter accumulation. The key features of the tuffaceous shale extracts are short-to long-chain n-alkanes, a range of Pr/Ph ratio values (0.80–1.42), a relatively high content of C29 steranes and a moderate content of gammacerane, showing that the redox state ranged from oxic to anoxic and that the water salinity conditions varied from fresh to brackish. And the high content of cyanobacteria is the primary cause of the high abundance of β-carotane and C29 sterane. It appears that volcanic ash did not change the redox condition of depositional environment. Considering that volcanic ash-bearing sediments usually have relatively high β-carotane and C29 sterane content, and previous studies have pointed out that volcanic ash can stimulate phytoplankton and promote productivity in modern sediments, we could speculated volcanic ash may release mineral ions such as iron, and then stimulated cyanobacteria, which was the main cause of organic matter accumulation in the tuffaceous shale of the Jimsar Sag. Tuffaceous shale Volcanic ash Organic matter origin Organic matter accumulation Lucaogou formation Qu, Jiangxiu verfasserin aut Imin, Ablimit verfasserin aut Zha, Ming verfasserin aut Su, Yang verfasserin aut Jiang, Zhongfa verfasserin aut Jiang, Hang verfasserin aut Enthalten in Journal of petroleum science and engineering Amsterdam [u.a.] : Elsevier Science, 1987 179, Seite 696-706 Online-Ressource (DE-627)303393076 (DE-600)1494872-2 (DE-576)259484024 nnns volume:179 pages:696-706 GBV_USEFLAG_U SYSFLAG_U GBV_ELV SSG-OLC-PHA SSG-OPC-GGO GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_150 GBV_ILN_151 GBV_ILN_224 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2336 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4313 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4393 38.51 Geologie fossiler Brennstoffe 57.36 Erdölgewinnung Erdgasgewinnung AR 179 696-706 |
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10.1016/j.petrol.2019.05.004 doi (DE-627)ELV002373076 (ELSEVIER)S0920-4105(19)30458-9 DE-627 ger DE-627 rda eng 660 DE-600 38.51 bkl 57.36 bkl Ding, Xiujian verfasserin aut Organic matter origin and accumulation in tuffaceous shale of the lower Permian Lucaogou Formation, Jimsar Sag 2019 nicht spezifiziert zzz rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier The Jimsar Sag is an important shale oil exploration target area in the Junggar Basin, northwestern China. The lower Permian Lucaogou Formation, with a thickness of 200–300 m, is composed of thin tuffite, tuffaceous dolomite, mudstone and siltstone, and is the primary exploration target. A comprehensive analysis is conducted on the bulk and molecular geochemical characteristics of the tuffaceous shale, to define the organic matter origin, depositional environment and organic matter accumulation. The key features of the tuffaceous shale extracts are short-to long-chain n-alkanes, a range of Pr/Ph ratio values (0.80–1.42), a relatively high content of C29 steranes and a moderate content of gammacerane, showing that the redox state ranged from oxic to anoxic and that the water salinity conditions varied from fresh to brackish. And the high content of cyanobacteria is the primary cause of the high abundance of β-carotane and C29 sterane. It appears that volcanic ash did not change the redox condition of depositional environment. Considering that volcanic ash-bearing sediments usually have relatively high β-carotane and C29 sterane content, and previous studies have pointed out that volcanic ash can stimulate phytoplankton and promote productivity in modern sediments, we could speculated volcanic ash may release mineral ions such as iron, and then stimulated cyanobacteria, which was the main cause of organic matter accumulation in the tuffaceous shale of the Jimsar Sag. Tuffaceous shale Volcanic ash Organic matter origin Organic matter accumulation Lucaogou formation Qu, Jiangxiu verfasserin aut Imin, Ablimit verfasserin aut Zha, Ming verfasserin aut Su, Yang verfasserin aut Jiang, Zhongfa verfasserin aut Jiang, Hang verfasserin aut Enthalten in Journal of petroleum science and engineering Amsterdam [u.a.] : Elsevier Science, 1987 179, Seite 696-706 Online-Ressource (DE-627)303393076 (DE-600)1494872-2 (DE-576)259484024 nnns volume:179 pages:696-706 GBV_USEFLAG_U SYSFLAG_U GBV_ELV SSG-OLC-PHA SSG-OPC-GGO GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_150 GBV_ILN_151 GBV_ILN_224 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2336 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4313 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4393 38.51 Geologie fossiler Brennstoffe 57.36 Erdölgewinnung Erdgasgewinnung AR 179 696-706 |
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660 DE-600 38.51 bkl 57.36 bkl Organic matter origin and accumulation in tuffaceous shale of the lower Permian Lucaogou Formation, Jimsar Sag Tuffaceous shale Volcanic ash Organic matter origin Organic matter accumulation Lucaogou formation |
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Organic matter origin and accumulation in tuffaceous shale of the lower Permian Lucaogou Formation, Jimsar Sag |
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Organic matter origin and accumulation in tuffaceous shale of the lower Permian Lucaogou Formation, Jimsar Sag |
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Ding, Xiujian Qu, Jiangxiu Imin, Ablimit Zha, Ming Su, Yang Jiang, Zhongfa Jiang, Hang |
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organic matter origin and accumulation in tuffaceous shale of the lower permian lucaogou formation, jimsar sag |
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Organic matter origin and accumulation in tuffaceous shale of the lower Permian Lucaogou Formation, Jimsar Sag |
abstract |
The Jimsar Sag is an important shale oil exploration target area in the Junggar Basin, northwestern China. The lower Permian Lucaogou Formation, with a thickness of 200–300 m, is composed of thin tuffite, tuffaceous dolomite, mudstone and siltstone, and is the primary exploration target. A comprehensive analysis is conducted on the bulk and molecular geochemical characteristics of the tuffaceous shale, to define the organic matter origin, depositional environment and organic matter accumulation. The key features of the tuffaceous shale extracts are short-to long-chain n-alkanes, a range of Pr/Ph ratio values (0.80–1.42), a relatively high content of C29 steranes and a moderate content of gammacerane, showing that the redox state ranged from oxic to anoxic and that the water salinity conditions varied from fresh to brackish. And the high content of cyanobacteria is the primary cause of the high abundance of β-carotane and C29 sterane. It appears that volcanic ash did not change the redox condition of depositional environment. Considering that volcanic ash-bearing sediments usually have relatively high β-carotane and C29 sterane content, and previous studies have pointed out that volcanic ash can stimulate phytoplankton and promote productivity in modern sediments, we could speculated volcanic ash may release mineral ions such as iron, and then stimulated cyanobacteria, which was the main cause of organic matter accumulation in the tuffaceous shale of the Jimsar Sag. |
abstractGer |
The Jimsar Sag is an important shale oil exploration target area in the Junggar Basin, northwestern China. The lower Permian Lucaogou Formation, with a thickness of 200–300 m, is composed of thin tuffite, tuffaceous dolomite, mudstone and siltstone, and is the primary exploration target. A comprehensive analysis is conducted on the bulk and molecular geochemical characteristics of the tuffaceous shale, to define the organic matter origin, depositional environment and organic matter accumulation. The key features of the tuffaceous shale extracts are short-to long-chain n-alkanes, a range of Pr/Ph ratio values (0.80–1.42), a relatively high content of C29 steranes and a moderate content of gammacerane, showing that the redox state ranged from oxic to anoxic and that the water salinity conditions varied from fresh to brackish. And the high content of cyanobacteria is the primary cause of the high abundance of β-carotane and C29 sterane. It appears that volcanic ash did not change the redox condition of depositional environment. Considering that volcanic ash-bearing sediments usually have relatively high β-carotane and C29 sterane content, and previous studies have pointed out that volcanic ash can stimulate phytoplankton and promote productivity in modern sediments, we could speculated volcanic ash may release mineral ions such as iron, and then stimulated cyanobacteria, which was the main cause of organic matter accumulation in the tuffaceous shale of the Jimsar Sag. |
abstract_unstemmed |
The Jimsar Sag is an important shale oil exploration target area in the Junggar Basin, northwestern China. The lower Permian Lucaogou Formation, with a thickness of 200–300 m, is composed of thin tuffite, tuffaceous dolomite, mudstone and siltstone, and is the primary exploration target. A comprehensive analysis is conducted on the bulk and molecular geochemical characteristics of the tuffaceous shale, to define the organic matter origin, depositional environment and organic matter accumulation. The key features of the tuffaceous shale extracts are short-to long-chain n-alkanes, a range of Pr/Ph ratio values (0.80–1.42), a relatively high content of C29 steranes and a moderate content of gammacerane, showing that the redox state ranged from oxic to anoxic and that the water salinity conditions varied from fresh to brackish. And the high content of cyanobacteria is the primary cause of the high abundance of β-carotane and C29 sterane. It appears that volcanic ash did not change the redox condition of depositional environment. Considering that volcanic ash-bearing sediments usually have relatively high β-carotane and C29 sterane content, and previous studies have pointed out that volcanic ash can stimulate phytoplankton and promote productivity in modern sediments, we could speculated volcanic ash may release mineral ions such as iron, and then stimulated cyanobacteria, which was the main cause of organic matter accumulation in the tuffaceous shale of the Jimsar Sag. |
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Organic matter origin and accumulation in tuffaceous shale of the lower Permian Lucaogou Formation, Jimsar Sag |
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