Co-rich Mn crusts from the Magellan Seamount cluster: the long journey through time

doi:10.1007/s00367-007-0055-5

	Co-rich Mn crusts from the Magellan Seamount cluster: the long journey through time
	Glasby, Geoffrey P.; Ren, Xiangwen ; Shi, Xuefa ; Pulyaeva, Irina A.
刊名	GEO-MARINE LETTERS
	2007-10
卷号	27 期号:5 页码:315-323
ISSN号	0276-0460
DOI	10.1007/s00367-007-0055-5
英文摘要	The Magellan seamounts began forming as large submarine shield volcanoes south of the equator during the Cretaceous. These volcanoes formed as a cluster on the small Pacific plate in a period when tectonic stress was absent. Thermal subsidence of the seafloor led to sinking of these volcanoes and the formation of guyots as the seamounts crossed the equatorial South Pacific (10-0 degrees S) sequentially and ocean surface temperatures became too high for calcareous organisms to survive. Guyot formation was completed between about 59 and 45 Ma and the guyots became phosphatized at about 39-34 and 27-21 Ma. Ferromanganese crusts began formation as proto-crusts on the seamounts and guyots of the Magellan Seamount cluster towards the end of the Cretaceous up to 55 Ma after the formation of the seamounts themselves. The chemical composition of these crusts evolved over time in a series of steps in response to changes in global climate and ocean circulation. The great thickness of these crusts (up to 15-20 cm) reflects their very long period of growth. The high Co contents of the outer parts of the crusts are a consequence of the increasing deep circulation of the ocean and the resulting deepening of the oxygen minimum zone with time. Growth of the Co-rich Mn crusts in the Magellan Seamount cluster can be considered to be the culmination of a long journey through time.
WOS研究方向	Geology ; Oceanography
语种	英语
出版者	SPRINGER
WOS记录号	WOS:000249445300002
内容类型	期刊论文
源URL	[http://ir.fio.com.cn/handle/2SI8HI0U/4549]
专题	自然资源部第一海洋研究所
作者单位	1.SOA, Inst Oceanog 1, Marine Geol Div, Qingdao 266061, Peoples R China; 2.No Caucasus Acad Fed Serv, Pyatigorsk, Russia
推荐引用方式 GB/T 7714	Glasby, Geoffrey P.,Ren, Xiangwen,Shi, Xuefa,et al. Co-rich Mn crusts from the Magellan Seamount cluster: the long journey through time[J]. GEO-MARINE LETTERS,2007,27(5):315-323.
APA	Glasby, Geoffrey P.,Ren, Xiangwen,Shi, Xuefa,&Pulyaeva, Irina A..(2007).Co-rich Mn crusts from the Magellan Seamount cluster: the long journey through time.GEO-MARINE LETTERS,27(5),315-323.
MLA	Glasby, Geoffrey P.,et al."Co-rich Mn crusts from the Magellan Seamount cluster: the long journey through time".GEO-MARINE LETTERS 27.5(2007):315-323.