Pyroclastic edifices record vigorous lava fountains during the emplacement of a flood basalt flow field, Roza Member, Columbia River Basalt Province, USA
Pyroclastic edifices record vigorous lava fountains during the emplacement of a flood basalt flow field, Roza Member, Columbia River Basalt Province, USA
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美国哥伦比亚河玄武岩省罗扎段,火山碎屑建筑物在洪水玄武岩流场就位期间记录了旺盛的熔岩喷泉
DOI:
10.1130/b30857.1
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发表时间:
2014
影响因子:
4.9
通讯作者:
Brown R
中科院分区:
文献类型:
--
作者:
Brown R
The 1300 km3tholeiitic lava flow field of the 14.98 Ma Roza Member of the Columbia River Basalt Province has the best-preserved vent system of any known continental flood basalt. Detailed geological mapping and logging of the exposed pyroclastic rocks along the >180-km-long vent system enable the reconstruction of pyroclastic edifices (partial cones) built around vents. The pyroclastic cones differ from those constructed during typical basaltic effusive eruptions and are characterized by low to moderate slope angles (<20°), have minimum heights up to ∼160 m, and are composed of dominantly coarse-grained, moderately to densely agglutinated and welded spatter and scoria that extend up to 750 m away from the vent. Thick, well-sorted fall deposits composed of moderately to highly vesicular scoria lapilli extend away from some vents and exhibit some characteristics comparable to the proximal deposits of violent Strombolian or subplinian eruptions. The recorded volcanic activity does not fit with common eruption styles of basaltic magmas, and the evidence indicates that the Roza eruption was punctuated by eruptive activity of unusually high intensity that was characterized by vigorous lava fountains. The extensive agglutinated deposits accumulated around the vents as a result of fallout from high (>1 km) fountains enhanced by fallout from the lower parts of convective plumes that rose above the fountains.
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影响因子:
3.9
作者:
N. Jarboe;R. Coe;P. Renne;J. Glen
通讯作者:
J. Glen
影响因子:
5.2
作者:
A. Woods
通讯作者:
A. Woods
DOI:
10.1098/rsta.1972.0009
发表时间:
1972-01
期刊:
Philosophical Transactions of the Royal Society of London. Series A, Mathematical and Physical Sciences
影响因子:
--
作者:
R. L. Christiansen;P. Lipman
通讯作者:
R. L. Christiansen;P. Lipman
DOI:
--
发表时间:
2008
期刊:
社会保険旬報 2008年10月21日号
影响因子:
--
作者:
姫野順一;北川勝彦;高橋泰;高橋泰
通讯作者:
高橋泰
DOI:
--
发表时间:
1992
期刊:
影响因子:
--
作者:
S. Reidel;T. Tolan
通讯作者:
T. Tolan