Results 41 to 50 of about 72,388 (278)

Hydrogen adsorption characteristics of coal rock and its geological significance

Meitan xuebao
Hydrogen, as an important clean energy source that can be used as an alternative to fossil energy, can reduce global greenhouse gas emissions. However, the large-scale hydrogen industry requires large reservoirs to store hydrogen, and the use of ...
Shuangbiao HAN, Jin WANG, Jie HUANG, Zhijun JIN, Quanyou LIU, Yongping WAN, Zhenchuan WANG, Yu LIU, Yu QIAO   +8 more
doaj   +1 more source

Petrographic Evidences for the Origin of Iron in IOCG IronDeposits of Kuh-E-Faryadoon and Kouli-Kosh, Southeast Central Iran [PDF]

Journal of Sciences, Islamic Republic of Iran, 2013
Kuh-E-Faryadoon and Kouli Kosh iron deposits are hosted by regional metamorphic rocks of Sanandaj-Sirjan zone around Deh-Bid area. Plugs and domes of acid rocks protrude these metamorphic rocks.
M. Sabzehei, H. Mirzaei, M Mostafavi
doaj  

Cooling history of the eastern Svecokarelides: whole-rock and mica Rb-Sr and hornblende K-Ar ages in the areas of Pihtipudas-Iisalmi and Joroinen-Sulkava, Finland [PDF]

Bulletin of the Geological Society of Finland, 1990
Rb-Sr age determination on mica and whole-rock samples and K-Ar age determination on hornblendes were carried out to get information on the time of metamorphism and early cooling in two Proterozic areas of the Finnish Svecokarelides.
U. Haudenschild
doaj   +1 more source

A New Approach of Well Productivity Evaluation for Fractured Buried Hill Gas Reservoirs Based on Imaging Logging Data

Applied Sciences, 2023
Fractures function as storage spaces and effective seepage channels for metamorphic rock buried hill reservoirs. Their effectiveness and permeability govern the content and enrichment of oil and gas.
Hongri Bi, Peng Chen
doaj   +1 more source

Contact Metamorphism in Southern California [PDF]

, 1954
A highly condensed introduction to "Contact metamorphism in southern California" is obviously not the place in which to indulge in semantic niceties nor to engage in terminological tussles, and thus the title is not intended to reflect a carefully ...
Campbell, Ian
core  

Machine Learning‐Driven Classification and Production Capacity Prediction of Tight Sandstone Reservoirs: A Case Study of the Taiyuan Formation, Ordos Basin

Energy Science &Engineering, EarlyView.
On the basis of core and log data, a Bayesian‐Optimized Random Forest model achieved 92.76% accuracy in classifying tight sandstone reservoirs. A gray relational analysis‐derived evaluation index shows > 80% consistency with actual gas zones. ABSTRACT Tight sandstone gas (TSG), an unconventional oil–gas resource, has heterogeneous reservoirs ...
Yin Yuan, Haijiao Fu, Detian Yan, Gang Wang, Shuguang Yang, Mengmeng Liu, Qingling Jiang, Xiaoming Wang, Wei Wang   +8 more
wiley   +1 more source

Metamorphic Rock-Hosted Orogenic Gold Deposit Type as a Source of Langkowala Placer Gold, Bombana, Southeast Sulawesi [PDF]

, 2011
DOI: 10.17014/ijog.v6i1.114In 2008, placer gold was discovered in Langkowala area (Bombana Regency), Southeast Sulawesi, Indonesia, and more than 60,000 traditional gold miners in the early 2009 have been operating by digging vertical pits and panning ...
Fadlin, F. (Fadlin), Idrus, A. (Arifudin), Nur, I. (I), Warmada, I. W. (I)   +3 more
core   +1 more source

Experimental Investigation of Sensitivity for Coal and Gas Outburst Risk Prediction Indexes in Raw and Tectonic Composite Coal Seams

Energy Science &Engineering, EarlyView.
A comparative study was conducted on gas desorption laws of raw and tectonic coals. The sensitivity of regional and local outburst prediction indexes was compared. Gas content is more sensitive than gas pressure for composite coal seams. K1 can more accurately predict the outburst danger than Δh2 $\Delta {h}_{2}$ in composite coal seams.
Haijun Guo, Xi Xi, Kai Wang, Liang Wang, Yulin Li   +4 more
wiley   +1 more source

Interpretation of zircon coronae textures from metapelitic granulites of the Ivrea–Verbano Zone, northern Italy: two-stage decomposition of Fe–Ti oxides [PDF]

Solid Earth, 2017
In this study, we report the occurrence of zircon coronae textures in metapelitic granulites of the Ivrea–Verbano Zone. Unusual zircon textures are spatially associated with Fe–Ti oxides and occur as (1) vermicular-shaped aggregates 50–200 µm long and
E. Kovaleva, E. Kovaleva, H. O. Austrheim, U. S. Klötzli   +3 more
doaj   +1 more source

Recycling Argon through Metamorphic Reactions: the Record in Symplectites [PDF]

, 2018
The 40Ar/39Ar ages of metamorphic micas that crystallized at high temperatures are commonly interpreted as cooling ages, with grains considered to have lost 40Ar via thermally-driven diffusion into the grain boundary network.
Allaz, Anderson, Anderson, Baxter, Beltrando, Berry, Blundy, Bryhni, Christopher S. McDonald, Clare J. Warren, Connolly, Cuthbert, Dale, Daniele Regis, de Sigoyer, Di Vincenzo, Dodson, Dransfield, Engvik, Eskola, Frost, Fuhrman, Gee, Gilotti, Godard, Groppo, Hacker, Hacker, Hacker, Hacker, Heinrich, Holland, Holland, Holland, Holland, Holland, Holland, Johnson, Kellett, Krogh, Kylander-Clark, Kylander-Clark, Labrousse, Li, Li, Lux, McDonald, Mulch, Peterman, Putlitz, Renne, Roberts, Root, Root, Sarah C. Sherlock, Schmidt, Schärer, Sherlock, Simon P. Kelley, Smith, Spencer, Tajcmanová, Terry, Terry, Tucker, Villa, Villa, Wain, Wain, Walsh, Walsh, Walsh, Warren, Warren, Warren, Watson, Wheeler, White, White, Whitney, Young, Young, Young   +82 more
core   +2 more sources