SHRIMP U-Pb dating for a K-bentonite bed in the Tieling Formation, North China

Su, Wenbo; Li, Huaikun; Huff, Warren D.; Ettensohn, Frank R.; Zhang, Shihong; Zhou, Hongying; Wan, Yusheng

doi:10.1007/s11434-010-4007-5

Cited by 144 publications

(48 citation statements)

References 18 publications

(32 reference statements)

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“…In contrast, mineralogical and geochemical data for deep-water, open-marine exhalites provide strong evidence for a low-oxygen (suboxic) state of the deep ocean during their deposition . Interestingly and surprisingly, large Mn deposits are absent during this time period with the single exception of the $ 1.44 Ga Wafangzi Mn deposit in NE China (Maynard, 2010;Su et al, 2010). This trend, if real, suggests that a strong oxic sink for Mn might not exist during this time period in the oceans.…”

Section: Proterozoic Age Gap In Major If Depositionmentioning

confidence: 82%

“…Oolitic ironstones are also developed in the $ 1.38 Ga Xiamaling Formation of the Xiahuayuan region in Hebei Province of North China (Su et al, 2010) and in the poorly dated, late Neoproterozoic (but preglacial) Nizhne-Angara Formation of the Angara-Pit area, Siberia, Russia. IFs deposited at $1490, 1368, and 767 Ma (see Appendix 1) broadly -within analytical error -correspond with ages for emplacement of LIPs at $1460, 1380, and either 780 or 755 Ma (Ernst et al, 2008).…”

Section: Proterozoic Age Gap In Major If Depositionmentioning

confidence: 99%

See 1 more Smart Citation

Iron Formations: Their Origins and Implications for Ancient Seawater Chemistry

Bekker

Planavsky

Rasmussen

et al. 2014

Treatise on Geochemistry

156

158

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Section: Proterozoic Age Gap In Major If Depositionmentioning

confidence: 82%

Section: Proterozoic Age Gap In Major If Depositionmentioning

confidence: 99%

Iron Formations: Their Origins and Implications for Ancient Seawater Chemistry

Bekker

Planavsky

Rasmussen

et al. 2014

Treatise on Geochemistry

156

158

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“…The Meso-Neoproterozoic in this region can be differentiated into 3 systems and 12 formations from bottom to top ( Figure 2). Recent chronological researches reveal that ages of the Xiamaling Formation and Tieling Formation overlying the Hongshuizhuang Formation were 1327-1368 Ma [25][26][27][28]1) ] and 1437±21 Ma [28], respectively. Therefore, the age of the Hongshuizhuang Formaiton was older than 1400 Ma which is in correspondence with the early period of the Yanshan aulacogen late extinction stage.…”

Section: Geological Settingmentioning

confidence: 99%

Correlation of burial organic carbon and paleoproductivity in the Mesoproterozoic Hongshuizhuang Formation, northern North China

et al. 2012

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In general, total organic carbon (TOC) is directly used as a proxy for paleoproductivity, however, it is not only affected by paleoproductivity, but also controlled by redox conditions and terrigenous detrital matter influx. Major and trace elements were analysed with the purpose of investigating the redox potential and paleoproductivity during deposition of the Hongshuizhuang Formation. In the present study, C-S relationship, V/Cr ratio and Mo concentration indicate that the dolomites were deposited in oxic environments, however, most of the black shales were accumulated in euxinic environments. P/Ti values in the Hongshuizhuang samples can be compared with those in the Japanese Ubara Permian-Triassic section which were regarded to be deposited under a moderate to high paleoproductivity. Ba/Al values are slightly lower than that of the laminated sediments from the continental margins of Central California (CCAL) which were thought to be accumulated under a high paleoproductivity. These results indicate that the paleoproductivity was moderate to high during deposition of the Hongshuizhuang Formation. Burial organic carbon shows positive correlations with V/Cr and Mo, but shows only weakly or no correlation with P/Ti and Ba/Al, respectively, suggesting that although the paleoproductivity was moderate to high during deposition of the Hongshuizhuang Formation, its organic-rich sediments were predominantly controlled by redox conditions and had no direct relationship with paleoproductivity.

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“…Precise chronological frameworks of the Proterozoic strata in the Yanshan basin have been established over recent years (Lu and Li, 1991;Gao et al, 2008Gao et al, , 2009Li et al, 2009Li et al, , 2010Li et al, , 2011Li et al, , 2014Su et al, 2010) (Fig. 2).…”

Section: Introductionmentioning

confidence: 99%

“…Stratigraphic columns of the Proterozoic Jixian section with geo-chronological constraints. Geo-chronological data: Gao et al (2008), Gao et al (2009), Li et al (2009Li et al ( , 2010Li et al ( , 2011Li et al ( , 2014, and Su et al (2010). Grypania: Yan and Liu, 1998;Valeria lophostriata: Peng et al, 2009;Leiosphaeridia: Lamb et al, 2009. Shi et al-Silicified Paleoproterozoic microbiota from China mostly crop out from dolostones of the third sedimentary member.…”

Section: Introductionmentioning

confidence: 99%

Silicified microbiota from the Paleoproterozoic Dahongyu Formation, Tianjin, China

et al. 2017

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Abstract.-Cherts and silicified dolostones of the ca. 1600 Ma Dahongyu Formation (uppermost Changcheng Group) from North China contain well-preserved microfossils. Cyanobacteria filaments and coccoids dominate the studied Dahongyu microbiota in the Jixian section. These microfossils show the characteristics of endobenthic, epibenthic, and allochthonous microfossils, which illustrated well a vertical distributional view of an intertidal microbiota. Large numbers and size of allochthonous microfossils are the distinguishing characteristics of this new microbiota. A few of these possess ornaments or odd morphology, which suggest their potential eukaryotic nature. Through regional comparisons, it is revealed that there was significant regional disparity within the Yanshan Basin of microbiotas during deposition of the Dahongyu Formation. The newly studied Dahongyu microbiota is similar to the microbiota from the underlying Changcheng Group, with only slight differences. The absence of typical eukaryotes and the emergence of unique microfossils (especially small fusiform microfossils) make the Dahongyu Formation and the subsequent strata of the Jixian Group distinct from contemporaneous eukaryote-bearing strata.In the Dahongyu assemblage, 19 species were recognized, six species were identified informally and seven species were identified in open nomenclature. One new taxon of microfossil was described: Xiaohongyuia sinica Shi and Feng new genus new species.

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SHRIMP U-Pb dating for a K-bentonite bed in the Tieling Formation, North China

Cited by 144 publications

References 18 publications

Iron Formations: Their Origins and Implications for Ancient Seawater Chemistry

Iron Formations: Their Origins and Implications for Ancient Seawater Chemistry

Correlation of burial organic carbon and paleoproductivity in the Mesoproterozoic Hongshuizhuang Formation, northern North China

Silicified microbiota from the Paleoproterozoic Dahongyu Formation, Tianjin, China

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