豫西济源地区下三叠统和尚沟组和中三叠统二马营组均为陆相河湖相沉积,本研究在和尚沟组和上覆二马营组中下段分别识别出遗迹化石5属6种和7属9种,这些化石材料成为探究大灭绝事件后陆地造迹生物复苏的良好材料。运用遗迹网络分析方法构...豫西济源地区下三叠统和尚沟组和中三叠统二马营组均为陆相河湖相沉积,本研究在和尚沟组和上覆二马营组中下段分别识别出遗迹化石5属6种和7属9种,这些化石材料成为探究大灭绝事件后陆地造迹生物复苏的良好材料。运用遗迹网络分析方法构建了和尚沟组和二马营组中下段遗迹网络,相关参数显示自早三叠世和尚沟组沉积期至中三叠世二马营组中下段沉积期,遗迹网络节点增加,平均度、平均加权度和图密度有所降低,网络直径、平均聚类系数和平均路径长度呈明显增加趋势,遗迹网络复杂化以及造迹生物对恶劣环境适应性的增强,这些可能是二叠纪—三叠纪之交灭绝事件(Permian-Triassic Mass Extinction,PTME)后生物复苏的潜在标志。推测PTME后华北地区生物复苏和生态恢复可能遵循着类似的模式,但后续研究仍需陆相实体化石证据的佐证与补充。展开更多
The oil shale with marine origin was first reported in 1987 from Shuanghui of the Qiangtang region. Its depositional sequence consists of brown\|black oil shale interbedded massive to thin limestone. Eleven oil shale ...The oil shale with marine origin was first reported in 1987 from Shuanghui of the Qiangtang region. Its depositional sequence consists of brown\|black oil shale interbedded massive to thin limestone. Eleven oil shale beds occur and aggregated thickness is up to 47 38m. It deposit age is confined in middle Jurassic by fossils identification. Nine samples selected from horizons with high\|organic contents have been examined by organic geochemistry approach. The oil\|shale range widely in organic carbon content (Toc), average in 8 34%, maximum values reaching 26.12%. Toc are markedly varied in vertical section. The Upper and lower members are slightly low and increase in the middle. The oil\|shale sediments are characterized by high concentration in chloroform bitumen“A”(608～18707)×10 -6 )and total hydrocarbon ((311～5272)×10 -6 ).The Rock\|Eval T \|max data (434～440℃) and vitrinite reflectance values (0.88%～1.26%) indicate that oil\|shale sequence are mature in all samples. The organic matter is predominantly made up of typeⅡ kerogen.展开更多
文摘豫西济源地区下三叠统和尚沟组和中三叠统二马营组均为陆相河湖相沉积,本研究在和尚沟组和上覆二马营组中下段分别识别出遗迹化石5属6种和7属9种,这些化石材料成为探究大灭绝事件后陆地造迹生物复苏的良好材料。运用遗迹网络分析方法构建了和尚沟组和二马营组中下段遗迹网络,相关参数显示自早三叠世和尚沟组沉积期至中三叠世二马营组中下段沉积期,遗迹网络节点增加,平均度、平均加权度和图密度有所降低,网络直径、平均聚类系数和平均路径长度呈明显增加趋势,遗迹网络复杂化以及造迹生物对恶劣环境适应性的增强,这些可能是二叠纪—三叠纪之交灭绝事件(Permian-Triassic Mass Extinction,PTME)后生物复苏的潜在标志。推测PTME后华北地区生物复苏和生态恢复可能遵循着类似的模式,但后续研究仍需陆相实体化石证据的佐证与补充。
文摘The oil shale with marine origin was first reported in 1987 from Shuanghui of the Qiangtang region. Its depositional sequence consists of brown\|black oil shale interbedded massive to thin limestone. Eleven oil shale beds occur and aggregated thickness is up to 47 38m. It deposit age is confined in middle Jurassic by fossils identification. Nine samples selected from horizons with high\|organic contents have been examined by organic geochemistry approach. The oil\|shale range widely in organic carbon content (Toc), average in 8 34%, maximum values reaching 26.12%. Toc are markedly varied in vertical section. The Upper and lower members are slightly low and increase in the middle. The oil\|shale sediments are characterized by high concentration in chloroform bitumen“A”(608～18707)×10 -6 )and total hydrocarbon ((311～5272)×10 -6 ).The Rock\|Eval T \|max data (434～440℃) and vitrinite reflectance values (0.88%～1.26%) indicate that oil\|shale sequence are mature in all samples. The organic matter is predominantly made up of typeⅡ kerogen.
