Results 1 to 10 of about 68,331 (259)

Semiquantitative microscopic pore characterizations of the metamorphic rock reservoir in the central paleo-uplift belt, Songliao Basin [PDF]

open access: yesScientific Reports, 2022
Currently, metamorphic rock is a common target for natural gas exploration, and reservoirs are the key factors restricting natural gas exploration and development in metamorphic rocks.
Zhouqiang Zeng   +6 more
doaj   +2 more sources

Weathering Processes and Mechanisms of Low-Grade Metamorphic Rock following Freeze-Thaw Processes [PDF]

open access: goldGeofluids, 2023
A remarkable risk in the field of rock engineering is the natural exposure of low-grade metamorphic rock to the freeze-thaw process. Examples of such materials are slate and phyllite, which are employed approximately mountainous permafrost zones.
Guopeng Wu   +3 more
doaj   +2 more sources

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

open access: diamond, 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)   +3 more
core   +3 more sources

V.—What is a Metamorphic Rock? [PDF]

open access: greenGeological Magazine, 1911
The latest book on metamorphism, Dr. V. Grubenmann'sKristallinen Schiefer, still leaves it an open question what a metamorphic rock is. Generally speaking there is no doubt about the matter; every geologist has a more or less precise idea of what he means by the term, but no one has yet been able to propound a definition which is perfectly satisfactory,
E. H. L. Schwarz
openaire   +4 more sources

New age constraints for metasedimentary rocks in southern Finland [PDF]

open access: yesBulletin of the Geological Society of Finland, 2023
Metasedimentary rocks from nine sampling sites in southern Finland and an intermediate dyke in one of these sites were sampled for analysis of U–Pb zircon age and geochemical composition.
Paula Salminen, Matti Kurhila
doaj   +1 more source

Metamorphic evolutions of high-pressure low-temperature units from ophiolitic mélange of North Soghan (NE Hajiabad, Hormozgan) [PDF]

open access: yesپترولوژی, 2021
The Seghin metamorphic complex of ophiolitic mélange from the north Soghan, composed of metamorphic suites varying in protolith and metamorphic grade. The rock units of this complex have been metamorphosed under PT conditions of pumpellyite- actinolite ...
akbar ahmadvand   +3 more
doaj   +1 more source

Study on changes of coal microstructure under the condition of igneous rock intrusion

open access: yesMeikuang Anquan, 2022
In order to study the effect of igneous rock intrusion on coal oxidation, the electronic scanning mirror, specific surface area tester and pressure mercury meter are used to test the coal samples before and after the igneous rock intrusion, by comparing
TANG Hui
doaj   +1 more source

PETROGRAPHY AND PROVENANCE OF SANDSTONE AND STUDIES OF SHALE OF KULDANA FORMATION, KALAMULA AND KHURSHEEABAD AREA, KAHUTA, AZAD KASHMIR [PDF]

open access: yesEarth Science Malaysia, 2017
Rocks exposed in the study area are Kuldana Formation which is comprised of variegated color shale and sandstone. The model data of Kuldana sandstone exhibit average quartz 35%, feldspars 3%, rock fragments 20% and heavy minerals. The quartz grains are
Ahmer, Muhammad
doaj   +1 more source

Soil Depth Prediction Model Using Terrain Attributes in Gangwon-do, South Korea

open access: yesApplied Sciences, 2023
Soil depth is a crucial parameter in slope stability analysis in mountainous areas. The drilling survey is the most reliable method for determining soil depth, but it requires a high cost for the vast geographical area.
Jinwook Kim, Hosung Shin
doaj   +1 more source

The Facies and Metamorphism Types Determination of Metamorphic Rock in The Part of Mekongga Complex

open access: yesGeosfera Indonesia, 2020
Lambolemo Village is geomorphologically dominated by hilly slopes morphology. Lithology in the form of metamorphic rocks are mica schists and chlorite schists. The present research aimed to determine the facies and metamorphism types of metamorphic rocks
M. Musnajam   +4 more
doaj   +1 more source

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