Results 11 to 20 of about 23,223 (131)

Extremely high He isotope ratios in MORB-source mantle from the proto-Iceland plume [PDF]

, 2003
The high ³He/⁴He ratio of volcanic rocks thought to be derived from mantle plumes is taken as evidence for the existence of a mantle reservoir that has remained largely undegassed since the Earth's accretion.
AD Saunders, AK Pedersen, B Marty, B Marty, BB Hanan, BS Hardarson, D Anderson, D Francis, D Porcelli, D Porcelli, DJ DePaolo, DM McKenzie, DR Hilton, DR Hilton, DW Graham, EH Hauri, ET Dixon, Finlay M. Stuart, FM Stuart, FM Stuart, I Robillard, J. Godfrey Fitton, JG Fitton, JG Fitton, JM Eiler, M Honda, MD Kurz, MD Kurz, MJ Whitehouse, RD van der Hilst, Robert M. Ellam, Solveigh Lass-Evans, T Prestvik, V Olive   +33 more
core   +2 more sources

Continental degassing of helium in an active tectonic setting (northern Italy): the role of seismicity [PDF]

, 2020
In order to investigate the variability of helium degassing in continental regions, its release from rocks and emission into the atmosphere, here we studied the degassing of volatiles in a seismically active region of northern Italy (MwMAX = 6) at the ...
Buttitta D., Caracausi A., Chiaraluce L., Favara R., Gasparo Morticelli M., Sulli A.   +5 more
core   +1 more source

Depositional Structures and Their Reservoir Characteristics in the Wufeng–Longmaxi Shale in Southern Sichuan Basin, China

Energies, 2022
This paper documents depositional structures and their reservoir characteristics in the Wufeng–Longmaxi shale from outcrops and cores using thin sections, X-ray powder diffraction (XRD) analysis, carbon–sulfur analyzer, helium porosimeter, decay ...
Zhensheng Shi, Tianqi Zhou, Hongyan Wang, Shasha Sun   +3 more
doaj   +1 more source

Magnetic field stabilization for high-accuracy mass measurements on exotic nuclides [PDF]

, 2007
The magnetic-field stability of a mass spectrometer plays a crucial role in precision mass measurements. In the case of mass determination of short-lived nuclides with a Penning trap, major causes of instabilities are temperature fluctuations in the ...
A. Herlert, Anderson, Bergström, Blaum, Blaum, Blaum, Bollen, Bollen, Bollen, Bollen, Bollen, Bollen, Bradley, Brown, Brunner, C. Yazidjian, Cornell, Eronen, Gabrielse, George, George, Gräff, Hardy, Herfurth, Herfurth, J. Alonso, K. Blaum, Kellerbauer, Kellerbauer, Kiong, Kugler, König, L. Schweikhard, Lunney, M. Dworschak, M. Marie-Jeanne, Mukherjee, Natarajan, Preston-Thomas, R. Savreux, Raimbault-Hartmann, S. Djekic, S. Stahl, Savard, Savard, Sz. Nagy, U. Hager, Van Dyck, Van Dyck, Yazidjian, Ziegler   +50 more
core   +2 more sources

Paleoenvironment, Geochemistry, and Pore Characteristics of the Postmature to Overmature Organic-Rich Devonian Shales in Guizhong Depression, Southwestern China

Geofluids, 2021
Investigating shale pore characteristics has deepened our understanding of shale reservoir, while that of postmature-overmature shales is yet to be revealed, which is especially critical for shale gas evaluation in southern China.
Yanqi Zhang, Li Liu, Changxi Geng, Zhuang Cheng, Xinxin Fang   +4 more
doaj   +1 more source

D/H ratios of the inner Solar System [PDF]

, 2017
The original hydrogen isotope (D/H) ratios of different planetary bodies may indicate where each body formed in the Solar System. However, geological and atmospheric processes can alter these ratios through time.
Hallis, Lydia
core   +1 more source

142Nd/144Nd Inferences on the nature and origin of the source of high 3He/4He magmas [PDF]

, 2017
High-precision measurements of 142Nd/144Nd in picrites from the Baffin Bay region that contain the highest 3He/4He ratios yet measured in terrestrial mantle-derived rocks are indistinguishable from the value measured in the terrestrial standard and other
Carlson, R.W., de Leeuw, G.A.M., Ellam, R.M., Stuart, F.M.   +3 more
core   +1 more source

Feasibility of high-helium natural gas exploration in the Presinian strata, Sichuan Basin

Natural Gas Industry B, 2015
Helium in China highly depends on import at present, so the most practical way to change the situation is searching for medium-to-large natural gas fields with high helium content.
Jian Zhang, Wei Yang, Haiyong Yi, Wuren Xie, Zengye Xie, Fuying Zeng, Yongjing Cen   +6 more
doaj   +1 more source

On the Role of Dissolved Gases in the Atmosphere Retention of Low-Mass Low-Density Planets [PDF]

, 2018
Low-mass low-density planets discovered by Kepler in the super-Earth mass regime typically have large radii for their inferred masses, implying the presence of H$_2$-He atmospheres.
Chachan, Yayaati, Stevenson, David J.
core   +3 more sources

Changes in hydrodynamic, structural and geochemical properties in carbonate rock samples due to reactive transport [PDF]

, 2017
Reactive transport plays an important role in the development of a wide range of both anthropic and natural processes affecting geological media. To predict the consequences of reactive transport processes on structural and hydrodynamic properties of a ...
Carrera Ramírez, Jesús, Luquot, Linda, Martínez Pérez, Laura   +2 more
core   +2 more sources