Results 241 to 250 of about 269,599 (304)

Widespread terrestrial ecosystem disruption at the onset of the Paleocene-Eocene Thermal Maximum. [PDF]

Proc Natl Acad Sci U S A
Nelissen M, Willard DA, van Konijnenburg-van Cittert H, Bowen GJ, Hollaar T, Sluijs A, Frieling J, Brinkhuis H.   +7 more
europepmc   +1 more source

Numerical and experimental study on P‐wave propagation across a rock joint with different orientations

Deep Underground Science and Engineering, EarlyView.
Joint orientation significantly affects P‐wave velocity, with the highest velocity at zero‐degree angles, decreasing to 30° as the angle increases. The velocity increases slightly from 30 to 45 degrees but sharply decreases from 45 to 90 degrees. Abstract Determination of the required parameters in different science contexts using the ultrasonic wave ...
Yaghoob Zarei, Mojtaba D. fallahi, Ali Uromeihy, Mohammad R. Nikoodel, Mohammad Fathollahy   +4 more
wiley   +1 more source

LA-ICP-MS Zircon U-Pb Ages, geochemical characteristics, and geological significance of the early cretaceous volcanic rocks in Haitangwan Town, Southern Hainan Island, China. [PDF]

PLoS One
Lin Y, Liang D, Yuan Q, Hu Z, Lv Z, Lv C.   +5 more
europepmc   +1 more source

The impact of forced closure on proppant distribution of hydraulic fracturing in shale formations

Deep Underground Science and Engineering, EarlyView.
Research findings demonstrate that implementing forced closure within shale formations can remarkably mitigate proppant settlement, concurrently increasing the effective propped surface area from 29.74% to 38.68%. Abstract Forced closure is widely used in conventional oil and gas reservoirs to promote uniform proppant placement.
Tongxuan Gu, Hanyi Wang, Quan Gan, Shuang Zheng   +3 more
wiley   +1 more source

Book review of \u27Himalaya to the Sea: Geology, Geomorphology and the Quaternary\u27 by John F. Shroder, Jr. (ed.) [PDF]

, 1996
Schelling, Daniel D.
core   +1 more source

Test-Time Augmentations and Quality Controls for Improving Regional Seismic Phase Picking. [PDF]

Sensors (Basel)
Han B, Tang L, Ma L, Kong H, Xiao Z.
europepmc   +1 more source

Gaborlet‐guided sparse filtering: A novel intelligent method for lithology identification by vibration signals while drilling

Deep Underground Science and Engineering, EarlyView.
The flowchart illustrates rock specimen testing, vibration signal acquisition, and feature extraction with Gaborlet and sparse filtering for classification. Abstract Traditional lithology identification methods mainly rely on core sampling and well‐logging data.
Jian Hao, Danqi Zhang, Zhenqi Song, Jinrui Wang, Qi Wang, Heqing Liu   +5 more
wiley   +1 more source

Correction: A vibration compensation approach for shipborne atomic gravimeter based on particle swarm optimization. [PDF]

Sci Rep
Qiao ZK, Shen ZH, Hu R, Li LL, Yuan P, Wu GC, Yuan Y, Zhou Y, Wu B, Lin Q.   +9 more
europepmc   +1 more source

Revisiting the greatness of Earth's great oxidation. [PDF]

Commun Earth Environ
Crockford PW, Sugiyama I, Kipp MA, Hao J, Nelson LL, Hemingway JD, Wimmer S, Fakhraee M.   +7 more
europepmc   +1 more source

Structural controls on multi-field coupled ore-bearing hydrothermal migration in Zhugongtang Zn-Pb deposit, Southwestern China. [PDF]

Sci Rep
Zhang Y, Zhou W, Zhang W, Zhang J, Tang C.   +4 more
europepmc   +1 more source