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藏东地区发现罕见的恐龙足迹群和古大象足迹群 被引量:2
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作者 姚华舟 李炎桂 +11 位作者 Junaid Khan Asma Tahir 安志辉 赵赫 张磊 吕政艺 王向东 赵来时 王建雄 何垚砚 安显银 张仁杰 《华中师范大学学报(自然科学版)》 CAS CSCD 北大核心 2021年第6期919-924,共6页
西藏昌都市卡若区发现罕见的蜥脚类、兽脚类、鸟脚类频密共生的恐龙足迹化石群,产于中侏罗世达布卡组滨湖相沉积中;昌都市江达县雪集拉山发现古近纪大象足迹化石群,产于贡觉组湖相、三角洲相地层中.这两个化石群是青藏高原中新生代地质... 西藏昌都市卡若区发现罕见的蜥脚类、兽脚类、鸟脚类频密共生的恐龙足迹化石群,产于中侏罗世达布卡组滨湖相沉积中;昌都市江达县雪集拉山发现古近纪大象足迹化石群,产于贡觉组湖相、三角洲相地层中.这两个化石群是青藏高原中新生代地质演化的重要历史见证,对研究青藏高原隆升和恐龙、古大象的迁徙、演化、古生态有着极其重要的意义. 展开更多
关键词 恐龙足迹 中侏罗世 大象足迹 古近纪 藏东地区
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Lower Triassic and Induan-Olenekian Boundary in Chaohu,Anhui Province,South China 被引量:10
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作者 TONG Jinnan zhao laishi 《Acta Geologica Sinica(English Edition)》 SCIE CAS CSCD 2011年第2期399-407,共9页
Since the West Pingdingshan Section in Chaohu was proposed as the candidate of the Global Stratotype Section and Point of the Induan-Olenekian boundary in 2003, the Lower Triassic of Chaohu has been extensively studie... Since the West Pingdingshan Section in Chaohu was proposed as the candidate of the Global Stratotype Section and Point of the Induan-Olenekian boundary in 2003, the Lower Triassic of Chaohu has been extensively studied. Based on the studies on the Lower Triassic of Chaohu, (1) a continuous conodont zonation is established, which has become an important reference for Lower Triassic stratigraphic correlation over the world; (2) the First Appearance Datum of conodont Neospathodus waageni was suggested and has been basically accepted as the primary marker to define the InduanOienekian boundary; (3) a characteristic Lower Triassic excursion of carbon isotopes was brought to light and has been proven to be not only an excellent index for the stratigraphic correlation but also a unique indication for the perturbation of ecological environments in the aftermath of the end-Permian mass extinction; (4) a magnetostratigraphic sequence is constituted with a certain biostratigraphic control in the low-latitude region and it presents an important correlation to the Boreal sequence; (5) a cyclostratigraphic study provides an alternative method to constrain the age of the chronostratigraphic units; and (6) a scheme of the Olenekian subdivision is recently suggested to define the boundary between the Smithian and Spathian Substages. In addition, Chaohu is also the type locality of the Chaohuan Stage, the upper stage of the Lower Triassic in the China Chronostratigraphic System.Thus, the Lower Triassic of Chaohu is not only a classic sequence in South China, but also a key reference sequence to the investigation of the corresponding stratigraphy and geological events over the world. The recent achievements are viewed here for an overall understanding of the sequence. Then the current situation of the Induan-Olenekian and Smithian-Spathian boundaries is discussed to provide a reference for later works. 展开更多
关键词 Lower Triassic Induan-Olenekian boundary Smithian-Spathian boundary Global Stratotype Section and Point CHAOHU China
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Uptake, accumulation and translocation of polycyclic aromatic hydrocarbons by winter wheat cultured on oily sludge-amended soil 被引量:2
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作者 YU Wenjuan KUANG Shaoping zhao laishi 《Chinese Journal Of Geochemistry》 EI CAS CSCD 2013年第3期295-302,共8页
The purpose of this study is to comparatively investigate the plant uptake, accumulation and translocation behaviors of polycyclic aromatic hydrocarbons (PAHs) as priority pollutants in soil contaminated with oily slu... The purpose of this study is to comparatively investigate the plant uptake, accumulation and translocation behaviors of polycyclic aromatic hydrocarbons (PAHs) as priority pollutants in soil contaminated with oily sludge. The influence of different oily sludge application doses on the uptake of contaminants was studied together with the profile of individual PAH in roots, straws and leaves of winter wheat. Pot experiments were conducted using oily sludge application doses of 0, 5, 10, 15 and 20 percent, respectively. The total PAHs contents of control soil and oily sludge were 16.96 and 3504.66 μg/g, respectively. Analysis for the contents of the 16 PAHs was carried out with a HPLC-UV using plant tissue samples obtained at the 265th day of growth. The total PAHs contents in treated winter wheat were 9.02-334.81 ng/g for roots, 8.45-336.52 ng/g for straws and 10.70-406.32 ng/g for leaves. In addition to 5% of oily sludge dose, the total PAHs content in leaves was always highest under other doses of oily sludge application. With respect to individual PAH, the content did not show a significant plant tissue related trend. However, both the total content and individual content of PAHs in treated winter wheat tissues did increase with increasing oily sludge application dose. Another analysis for the control soil indicates that the degradation rate of PAHs was significantly enhanced by winter wheat after 265 days of growth based on the residual concentrations of PAHs in planted and unplanted soils. 展开更多
关键词 含油污泥 多环芳烃 植物吸收 冬小麦 土壤 积累 优先污染物 PAHS
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A conodont-based Middle Triassic age assignment for the Luoping Biota of Yunnan, China 被引量:19
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作者 ZHANG QiYue ZHOU ChangYong +6 位作者 LU Tao XIE Tao LOU XiongYing LIU Wei SUN YuanYuan HUANG JinYuan zhao laishi 《Science China Earth Sciences》 SCIE EI CAS 2009年第10期1673-1678,共6页
The Luoping Biota consists of abundant and well-preserved marine fishes, reptiles, invertebrates, and plants. It occurs in the Middle Triassic Guanling Formation in Daaozi Village of Luoping County, Yun-nan Province, ... The Luoping Biota consists of abundant and well-preserved marine fishes, reptiles, invertebrates, and plants. It occurs in the Middle Triassic Guanling Formation in Daaozi Village of Luoping County, Yun-nan Province, China. Based on conodonts, the Luoping Biota is determined to lie within the Nicoraella kockeli Zone, which is assigned to the Pelsonian substage of the Anisian. 展开更多
关键词 Luoping BIOTA ANISIAN Guanling FORMATION CONODONT
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Lower Triassic Smithian-Spathian Boundary at West Pingdingshan Section in Chaohu,Anhui Province 被引量:8
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作者 LIANG Dan TONG JinNan zhao laishi 《Science China Earth Sciences》 SCIE EI CAS 2011年第3期372-379,共8页
The West Pingdingshan Section in Chaohu, Anhui Province, has been extensively studied in recent years and become one of the classic Lower Triassic sequences well-clarified in multiple stratigraphies. Also it is an imp... The West Pingdingshan Section in Chaohu, Anhui Province, has been extensively studied in recent years and become one of the classic Lower Triassic sequences well-clarified in multiple stratigraphies. Also it is an important section that defines the Smithian-Spathian (S-S) boundary within the Olenekian Stage. The S-S boundary strata at the section are restudied in high-resolution conodont biostratigraphy and carbon isotopes. The refined S-S boundary defined by the FAD of conodont Neospathodus pingdingshanensis is at 30 cm above the base of Bed 52, corresponding to a rapid diversification of conodonts. A sharp positive shift of δ13Ccarb curve co-occurs at the S-S boundary and it can be used as a key reference to define the boundary. The defined S-S boundary position and carbon isotopes curve can be well correlated globally. 展开更多
关键词 Early Triassic Smithian-Spathian boundary CONODONT carbon isotopes CHAOHU Anhui
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