Plume-Lithosphere Interaction and Delamination at Yellowstone and Its Implications for the Boundary of Craton Stability

Shi, Ya-Nan; Morgan, Jason P.

2022-01-28

10.1029/2021GL096864

GEOPHYSICAL RESEARCH LETTERS   影响因子和分区

0094-8276

1944-8007

Delamination of the lower lithosphere has occurred under different tectonic settings, thereby inducing strong lateral lithospheric strength heterogeneities. Here, we examine a recent case of plume-induced lithosphere delamination associated with the Yellowstone plume. We propose that interaction between the Yellowstone plume and western North American lithosphere is what led to delamination of the lower lithosphere beneath the Columbia River Basalt (CRB) roughly similar to 17 Myr ago. The excess melting that occurred when this "hole" was being filled by Yellowstone plume material was the primary trigger for the CRB excess melting event. The delaminated lower lithosphere currently lies to the northeast of the CRB; it can be clearly identified in recent seismic tomographic models. We suggest that both weak zones, for example, lithosphere-crossing faults or suture zones, or vertical weaknesses associated with hotspot tracks, and strong zones (regions not underlain by weak mid-lithosphere discontinuity material) can become the lateral boundaries of lithosphere delamination.

craton lithospheric thinning mantle plume Yellowstone hotspot mid-lithosphere discontinuity numerical modeling

SCI ; EI

英语

第一 ; 通讯

NSFC["K20310601","K20311009"]

Geology

Geosciences, Multidisciplinary

WOS:000751642800008

AMER GEOPHYSICAL UNION

20220511571373

Chemical Operations:802.3

GEOSCIENCES

Web of Science

Southern Univ Sci & Technol, Dept Ocean Sci & Engn, Shenzhen, Peoples R China

Shi, Ya-Nan,Morgan, Jason P.. Plume-Lithosphere Interaction and Delamination at Yellowstone and Its Implications for the Boundary of Craton Stability[J]. GEOPHYSICAL RESEARCH LETTERS,2022,49(2).

Shi, Ya-Nan,&Morgan, Jason P..(2022).Plume-Lithosphere Interaction and Delamination at Yellowstone and Its Implications for the Boundary of Craton Stability.GEOPHYSICAL RESEARCH LETTERS,49(2).

Shi, Ya-Nan,et al."Plume-Lithosphere Interaction and Delamination at Yellowstone and Its Implications for the Boundary of Craton Stability".GEOPHYSICAL RESEARCH LETTERS 49.2(2022).