Results 11 to 20 of about 21,738 (130)

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

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

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

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

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

The Chemistry of Population III Supernova Ejecta: I - Formation of Molecules in the Early Universe [PDF]

, 2009
We study the formation and destruction of molecules in the ejecta of Population III supernovae (SNe) using a chemical kinetic approach to follow the evolution of molecular abundances from day 100 to day 1000 after explosion. The chemical species included
Andreazza, Bandiera, Beelen, Bromm, Catchpole, Cherchneff, Clayton, Dalgarno, Danziger, Dwek, Eli Dwek, Fesen, Fryer, Gearhart, Gerardy, Heger, Isabelle Cherchneff, Khare, Kotak, Kotak, Liu, Liu, MacKey, Meikle, Müller, Nozawa, Nozawa, Omukai, Rho, Roche, Singh, Smith, Spyromilio, Sunyaev, Umeda, Willacy, Zinner   +36 more
core   +3 more sources

Chemical and Noble Gas Isotope Compositions of Formation Gases from a 3 km Deep Scientific Borehole in the Koyna Seismogenic Zone, Western India

Geofluids, 2019
A 3 km deep research borehole KFD1 was drilled in the Koyna reservoir-triggered seismicity region, Western India, between December 2016 and May 2017.
Nagaraju Podugu, Satrughna Mishra, Thomas Wiersberg, Sukanta Roy   +3 more
doaj   +1 more source

The accretion-diffusion scenario for metals in cool white dwarfs

, 2006
We calculated diffusion timescales for Ca, Mg, Fe in hydrogen atmosphere white dwarfs with temperatures between 5000 and 25000 K. With these timescales we determined accretion rates for a sample of 38 DAZ white dwarfs from the recent studies of Zuckerman
Aannestad, Alcock, Becklin, Berger, Bondi, Bondi, Chayer, D. Koester, D. Wilken, Dupuis, Dupuis, Dupuis, Farihi, Fontaine, Jura, Kilic, Koester, Lehner, Linsky, Livio, McCook, Muchmore, Muchmore, Paquette, Paquette, Reach, Redfield, Redfield, Redfield, Redfield, Ruffert, Ruffert, Schatzman, Sfeir, Tassoul, Welsh, Welsh, Zuckerman, Zuckerman   +38 more
core   +2 more sources