Triassic deep-marine sedimentation in the western Qinling and Songpan terrane
文献类型：期刊论文
| 作者 | Meng QingRen1,2; Qu HongJie2,3; Hu JianMin3 |
| 刊名 | SCIENCE IN CHINA SERIES D-EARTH SCIENCES
 |
| 出版日期 | 2007-11-01 |
| 卷号 | 50页码:246-263 |
| ISSN号 | 1006-9313 |
| 关键词 | Songpan terrane western Qinling Triassic basin deep-marine sedimentation |
| DOI | 10.1007/s11430-007-6009-y |
| 文献子类 | Article |
| 英文摘要 | Triassic sequences in both the western Qinling and Songpan terrane are composed mostly of deep-marine sediments. A detailed study was carried out on main sedimentary facies of Triassic successions, showing that they resulted from diverse sedimentary processes, such as submarine debris-flows, turbidity currents, bottom-flows, suspension fallout, and fluidized sediment flows. Debris-flows are dividable into two types, gravelly and sandy debris-flows, respectively, and the sandy debris-flow deposits make up considerable portion of the Triassic successions concerned. Turbidite is characterized by occurrence of normal grading, and the whole Bouma sequences, though widely developed, are not totally attributed to true turbidity currents. The non-graded Ta division is thought to originate from sandy debris flows, whereas the rest divisions result from low-density currents or from bottom-current modification if they contain sedimentary structures related to traction currents. Four types of facies associations are distinguished within Triassic deep-marine successions: massive and thick-bedded coarse-grained facies association, medium- and thick-bedded sandstone with interlayered fine-grained facies association, interlayered thin-bedded fine-grained facies association, and syn-sedimentary slump/breccia facies association. Spatial distribution of the different facies associations suggests that Lower Triassic sedimentation occurred primarily in continental slope, submarine channels, and base-of-slope aprons in the Hezuo-Jianzha region of the western Qinling, whereas the Middle Triassic consists mainly of sedimentary facies of base-of-slope aprons and submarine incised valleys. The counterparts in the Dangchang-Diebu region, in contrast, are characterized by platform carbonates. The shallow-marine carbonates evolved into deep-marine facies since the Ladinian, indicative of rapid drowning of the Carnian carbonate platform in Middle Triassic times. Depositional history of Lower Triassic and lower portion of Middle Triassic successions in the northern Songpan terrane is similar to that of the Dangchang-Diebu region of the western Qinling, as manifested by development of Lower-early Middle Triassic shallow-marine carbonate and a rapid shift to base-of-slope apron sediments since the Ladinian. |
| WOS关键词 | DENSITY TURBIDITY CURRENTS ; GRAIN-FLOW DEPOSITS ; SOUTH CHINA BLOCKS ; GARZE FOLD BELT ; TIBETAN PLATEAU ; TECTONIC EVOLUTION ; SICHUAN BASIN ; DEBRIS FLOWS ; CLASSIFICATION ; CONTOURITES |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| 出版者 | SCIENCE CHINA PRESS |
| WOS记录号 | WOS:000252177300023 |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/67374]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Meng QingRen |
| 作者单位 | 1.NW Univ Xian, Dept Geol, State Key Lab Continental Dynam, Xian 710069, Peoples R China 2.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China 3.Chinese Acad Geosci, Inst Geomech, Beijing 100081, Peoples R China |
| 推荐引用方式 GB/T 7714 | Meng QingRen,Qu HongJie,Hu JianMin. Triassic deep-marine sedimentation in the western Qinling and Songpan terrane[J]. SCIENCE IN CHINA SERIES D-EARTH SCIENCES,2007,50:246-263. |
| APA | Meng QingRen,Qu HongJie,&Hu JianMin.(2007).Triassic deep-marine sedimentation in the western Qinling and Songpan terrane.SCIENCE IN CHINA SERIES D-EARTH SCIENCES,50,246-263. |
| MLA | Meng QingRen,et al."Triassic deep-marine sedimentation in the western Qinling and Songpan terrane".SCIENCE IN CHINA SERIES D-EARTH SCIENCES 50(2007):246-263. |
入库方式： OAI收割
来源：地质与地球物理研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。