Results 41 to 50 of about 688 (199)

Petrofacies types and evolution characteristics of tight sandstone gas reservoirs of Jurassic Shaximiao Formation, Tianfu gas area, central Sichuan Basin

Shiyou shiyan dizhi
The classification of rock types is important for characterizing the heterogeneity of tight sandstone reservoirs and revealing their differential evolution process.
Xu GUAN, Xiaoting PANG, Qi RAN, Changcheng YANG, Xiaojuan WANG, Deyu ZHU, Ke PAN, Fei LI, Boyi XIAO, Binfeng CAO   +9 more
doaj   +1 more source

Carbon Isotope and Abundance Systematics Reveal an Insignificant Crustal Sink of Mantle‐Derived CO2 in On‐Land Rift Zone Geothermal Systems

Geochemistry, Geophysics, Geosystems, Volume 26, Issue 10, October 2025.
Abstract Rift zones, both on land and submarine, are key pathways for mantle‐derived CO2 degassing to the Earth's surface. Fixation of CO2 as carbonates plays a critical role in regulating these emissions. This study examines carbon abundance and isotope compositions in hydrothermal fluids, altered rocks, and carbonates from geothermal systems in both ...
Barbara I. Kleine‐Marshall, Maud J. Smit, Diego I. Toro Vivanco, Emilie Thomassot, Nico Müller, Ann Marie di Stefano, Emily Pope, Tod E. Waight, Heejin Jeon, Martin J. Whitehouse, Kevin Padilla, Frauke Wiese, Thráinn Fridriksson, Halldór Ármansson, Sveinborg H. Gunnarsdóttir, Kiflom G. Mesfin, Ásgerður K. Sigurðardóttir, Jens Fiebig, Andrea Ricci, Jóhann Gunnarsson‐Robin, Sæmundur A. Halldórsson, Shuhei Ono, Árný E. Sveinbjörnsdóttir, Andri Stefánsson   +23 more
wiley   +1 more source

Effects of cementation on physical properties of clastic rock-originated weathering crust reservoirs in the Kexia region, Junggar Basin, NW China

Energy Geoscience, 2023
Cements are widely developed in clastic rock-originated weathering crust (CWC) reservoirs in the Kexia region along the northwestern margin of the Junggar Basin and significantly affect reservoir physical properties and oil and gas distribution in this ...
Changhai Gao, Shida Meng, Jiahao Zhang, Jian Wang, Yifei Sun   +4 more
doaj   +1 more source

K‐Metasomatic Weakening of Oceanic Crust at Shallow Subduction Depths: Evidence From the Rodeo Cove Thrust Zone, Marin Headlands, California

Geochemistry, Geophysics, Geosystems, Volume 26, Issue 7, July 2025.
Abstract Studies of exhumed subduction shear zones indicate that metamorphism and metasomatism of the oceanic lithosphere influence the composition, structure, and rheology of megathrust faults, particularly deep along the plate boundary (>30 km). However, less is known about the effects that fluid‐mediated chemical reactions have on the rheological ...
Benjamin D. Belzer, Melodie E. French, Noah J. Phillips   +2 more
wiley   +1 more source

A natural nanosponge: new insights on the crystal-fluid interactions in laumontite

, 2018
Laumontite, |(Ca4-xNax)Kx(H2O)n| [Al8Si16O48], space group C2/m, is one of the most common natural zeolites occurring in a wide range of geological environments, including oceanic basalts, in vugs of plutonic and volcanic rocks and in sedimentary rocks ...
Merlini M., Lotti P., Gatta G. D., Hanfland M., Comboni D.   +4 more
core   +2 more sources

Geochemistry and U–Pb Geochronology of Garnet From the Somerset and Arab Gold Deposits, Vumba Greenstone Belt, Northeastern Botswana: Implications for the Timing of Gold Mineralization

Resource Geology, Volume 75, Issue 1, January/December 2025.
A syn‐ to post‐peak amphibolite facies gold mineralization event has been identified in the Vumba Greenstone Belt (VGB) of northeastern Botswana. The garnet U–Pb dating yields three overlapping ages of sulfide‐bearing garnets: garnet 1 (2655 ± 58 Ma), garnet 2 (2680 ± 113 Ma) and garnet 3 (2679 ± 41 Ma).
Lebogang Mokane, Andrea Agangi, Ryohei Takahashi, Thierry Bineli Betsi, Kelebogile Phili, Manuel Nopeia, Tebogo Kelepile, Mayuko Fukuyama, Zibisani Bagai, Pearlyn Manalo   +9 more
wiley   +1 more source

Zeolites in the Granitic Rocks of Chugoku District, Southwest Japan [PDF]

, 1994
Ca-zeolites such as laumontite, stilbite and chabazite were found in the granitic rocks of both magnetite and ilmenite series of late Cretaceous to Tertiary age developed widely in the Chugoku district. These zeolites occur (1) in veins of various scale,
KITAGAWA, Ryuji, WAKISAKA, Hiroshi, TAKENO, Setsuo, NISHIDO, Hirotsugu, YOSHIASA, Akira   +4 more
core   +1 more source

Characteristics and development model of underwater eruptive volcanic reservoirs in continental lacustrine basin: A case study of Chaganhua Subsag in Changling Fault Depression, Songliao Basin [PDF]

Youqicang pingjia yu kaifa
Industrial oil and gas have been found in the volcaniclastic rocks of the Huoshiling Formation erupted underwater in the continental lacustrine basin of the Changling fault depression in the Songliao Basin, which has broad exploration prospects.
REN Xianjun,SHI Yunqian,JING Wei
doaj   +3 more sources

Quantifying the effects of different hydrocarbon charging periods on reservoir quality: A case study of the Upper Wuerhe Formation, Junggar Basin, NW China

Energy Exploration & Exploitation
Mineral dissolution and precipitation is an important factor affecting pore genesis and hydrocarbon accumulation in sedimentary basins. Differential diagenetic processes at different hydrocarbon charging periods generally cause disparate effects on ...
Linjun Huang, Zecheng Wang, Shuxin Pan, Haiguang Wu, Duonian Xu, Shuai Jiang, Xun Kang   +6 more
doaj   +1 more source

Studies on Evaporite Minerals from Dry Valley, Victoria Land, Antarctica

Antarctic Record, 1977
The areal and vertical distributions of evaporite minerals in the Taylor Valley and the Wright Valley were studied with X-ray diffraction techniques to disclose the origins of salts. Halite, sylvite. thenardite. mirabilite.
Takashi NISHIYAMA
doaj   +1 more source