Search
Now showing items 1-10 of 13
Constraints on Seismic Anisotropy in the Mantle Transition Zone from Long-Period SS Precursors
(2019)
The mantle transition zone (MTZ) of Earth is demarcated by solid-to-solid phase changes of the mineral olivine that produce seismic discontinuities at 410 and 660 km depths. Mineral physics experiments predict that wadsleyite ...
Characterization of the regional, crustal, and global distribution and abundance of the heat producing elements and their geoneutrino flux
(2019)
The amount and distribution of radiogenic power generation from the heat producing elements (HPE) U, Th, and K in the Earth is not well constrained. Compositional estimates of these elements vary by a factor of three in ...
Origin of the anomalous sulfur isotope composition of the Rustenburg Layered Suite (Bushveld Complex), South Africa
(2019)
The 2.06 Ga Bushveld Magmatic Province (BMP) hosts the largest platinum group element (PGE) reserve of the world that occurs mainly as sulfide-rich layers within the Rustenburg Layered Suite (RLS), and also in mineralized ...
Stabilizing Effect of High Pore Fluid Pressure on Slip Behaviors of Gouge-bearing Faults
(2019)
We conducted experiments to investigate the influence of pore fluid pressure on the frictional strength and slip behavior of gouge bearing faults. Saw-cut porous sandstone samples with a layer of gouge powders placed between ...
Groundwater Variations from Autocorrelation and Receiver Functions
(2019)
This dataset supports the following research: Using a 20-year continuous broadband record and two independent single-station techniques – ambient noise autocorrelation and receiver functions – we document a relationship ...
Using Shear Waves to Characterize a Firn Aquifer on the Helheim Glacier in Southeast Greenland
(2019)
The Greenland ice sheet is melting at an accelerating rate due to increasing global average temperatures. Ice penetrating radar surveys and ice cores extracted from the southeastern margin of the Greenland ice sheet near ...
THE SEDIMENT AND CRUSTAL STRUCTURE OF THE SOUTHEASTERN UNITED STATES
(2019)
The Southeastern United States (SEUS) preserves a detailed geologic record of the continental collision and rifting that has shaped it over billions of years. Currently the SEUS lies on a passive margin far away from ongoing ...
The Seismic Signatures of Recently Formed Impact Craters on Mars
(Journal of Geophysical Research Planets, 2019-09)
We investigated the seismic signatures of recent impact crater clusters on Mars that would be recorded by the InSight Seismic Experiment for Interior Structure (SEIS) seismometers. We used a database of 77 measured and ...
APPLYING GEODESY TO MODEL POSTSEISMIC SLIP OF THE 2016 MW 6.4 MEINONG EARTHQUAKE
(2019)
In regions of rapid convergence such as southwest Taiwan, unmapped active structures at multiple depths increase the uncertainty of seismic hazard estimates. The 2016 Mw 6.4 MeiNong earthquake occurred below the main Taiwan ...
ROCK FLUID INTERACTION AND ITS EFFECT ON BRITTLE ROCK DEFORMATION
(2019)
Accurate assessments of Earth’s dynamic processes, which produce earthquakes and volcanoes, require better understanding of rock deformation. All rocks, to some extent, contain pores. In the Earth’s crust, the pore space ...