IOCAS-IR  > 海洋地质与环境重点实验室
Compositional and temperature variations of the Pacific upper mantle since the Cretaceous
Zhang Guoliang1,2
2016-04-01
发表期刊ACTA OCEANOLOGICA SINICA
卷号35期号:4页码:19-25
文章类型Article
摘要The geological evolution of the Earth during the mid-Cretaceous were shown to be anomalous, e.g., the pause of the geomagnetic field, the global sea level rise, and increased intra-plate volcanic activities, which could be attributed to deep mantle processes. As the anomalous volcanic activities occurred mainly in the Cretaceous Pacific, here we use basalt chemical compositions from the oceanic drilling (DSDP/ODP/IODP) sites to investigate their mantle sources and melting conditions. Based on locations relative to the Pacific plateaus, we classified these sites as oceanic plateau basalts, normal mid-ocean ridge basalts, and near-plateau seafloor basalts. This study shows that those normal mid-ocean ridge basalts formed during mid-Cretaceous are broadly similar in average Na-8, La/Sm and Sm/Yb ratios and Sr-Nd isotopic compositions to modern Pacific spreading ridge (the East Pacific Rise). The Ontong Java plateau (125-90 Ma) basalts have distinctly lower Na-8 and Nd-143/Nd-144, and higher La/Sm and Sr-87/Sr-86 than normal seafloor basalts, whereas those for the near-plateau seafloor basalts are similar to the plateau basalts, indicating influences from the Ontong Java mantle source. The super mantle plume activity that might have formed the Ontong Java plateau influenced the mantle source of the simultaneously formed large areas of seafloor basalts. Based on the chemical data from normal seafloor basalts, I propose that the mantle compositions and melting conditions of the normal mid-ocean ridges during the Cretaceous are similar to the fast spreading East Pacific Rise. Slight variations of mid-Cretaceous normal seafloor basalts in melting conditions could be related to the local mantle source and spreading rate.
关键词Mantle Temperature Mantle Source Super Mantle Plume Cretaceous Mid-ocean Ridge Basalt
DOI10.1007/s13131-016-0839-4
收录类别SCI
语种英语
WOS记录号WOS:000374250700003
引用统计
文献类型期刊论文
版本出版稿
条目标识符http://ir.qdio.ac.cn/handle/337002/131010
专题海洋地质与环境重点实验室
作者单位1.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Geol & Environm, Qingdao 266071, Peoples R China
2.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Geol, Qingdao 266235, Peoples R China
推荐引用方式
GB/T 7714
Zhang Guoliang. Compositional and temperature variations of the Pacific upper mantle since the Cretaceous[J]. ACTA OCEANOLOGICA SINICA,2016,35(4):19-25.
APA Zhang Guoliang.(2016).Compositional and temperature variations of the Pacific upper mantle since the Cretaceous.ACTA OCEANOLOGICA SINICA,35(4),19-25.
MLA Zhang Guoliang."Compositional and temperature variations of the Pacific upper mantle since the Cretaceous".ACTA OCEANOLOGICA SINICA 35.4(2016):19-25.
条目包含的文件
文件名称/大小 文献类型 版本类型 开放类型 使用许可
Compositional and te(993KB)期刊论文出版稿开放获取CC BY-NC-SA浏览 请求全文
个性服务
推荐该条目
保存到收藏夹
查看访问统计
导出为Endnote文件
谷歌学术
谷歌学术中相似的文章
[Zhang Guoliang]的文章
百度学术
百度学术中相似的文章
[Zhang Guoliang]的文章
必应学术
必应学术中相似的文章
[Zhang Guoliang]的文章
相关权益政策
暂无数据
收藏/分享
文件名: Compositional and temperature variations of the Pacific upper mantle since the Cretaceous.pdf
格式: Adobe PDF
所有评论 (0)
暂无评论
 

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。