1-20 OF 763 RESULTS FOR

cement

Results shown limited to content with bounding coordinates.
Follow your search
Access your saved searches in your account

Would you like to receive an alert when new items match your search?
Close Modal
Sort by
Journal Article
Journal: GSA Bulletin
Published: 20 February 2025
GSA Bulletin (2025)
..., fluid inclusion, and C-O-Nd isotope data and in situ U-Pb ages of calcite cement to determine the timing and mechanisms of bed-parallel fracture formation. Our findings revealed two generations of bed-parallel fractures: type A and type B fractures. The crystallization age of calcite cement in type...
Journal Article
Journal: Geoenergy
Published: 17 February 2025
Geoenergy (2025) 3 (1): geoenergy2024-023.
... in the northern UKSNS. Diagenetic cements (carbonates, sulfates and halite) are common. Most are early and episodic, patchy at local and regional scales, with periods of replacement and dissolution. Consequential fine-scale heterogeneous compaction textures are unrelated to current or maximum burial depths...
FIGURES | View All (5)
Journal Article
Published: 11 February 2025
Journal of Sedimentary Research (2025) 95 (1): 133–155.
... the basin due to paleoenvironmental facies distribution, framework clast composition, and diagenetic processes. Carbonate cements dominate the coarser-grained (fluvial) facies in the northern region. In contrast, gypsum is more conspicuous in the finer-grained (lacustrine and playa lake) facies prevalent...
FIGURES | View All (11)
Journal Article
Journal: AAPG Bulletin
Published: 01 January 2025
AAPG Bulletin (2025) 109 (1): 57–84.
... are investigated in this work based on oil geochemistry, fluid inclusion analyses, and in situ U-Pb dating of calcite cements. Four charge episodes are identified based on the following: (1) the similar origin but different maturation histories of sampled crude oils; (2) the four distinct fluorescence-color...
FIGURES | View All (14)
Journal Article
Published: 01 December 2024
Russ. Geol. Geophys. (2024) 65 (12): 1485–1502.
...- and fracture-filling cementing saddle dolomite and cementing calcites are recognized in the field. Petrographic studies show the complex diagenetic history of the Samana Suk Formation from near-surface diagenesis, including micritization, neomorphism, and several varieties of dolomites. These varieties...
FIGURES | View All (11)
Journal Article
Published: 22 November 2024
American Mineralogist (2024)
... operational timescales. Hydrothermal interactions between engineered materials (e.g., bentonite buffers, cements, waste canister materials) and the host rock environment may drive alteration processes that affect the advantageous properties of some barrier materials. However, such alteration will also promote...
Journal Article
Journal: AAPG Bulletin
Published: 01 November 2024
AAPG Bulletin (2024) 108 (11): 2045–2072.
... cementation and concurrently with fracturing. The older oil inclusions record the initial oils that served as precursors to the pyrobitumen, while the younger generation was likely formed during oil cracking. Fissure calcites containing primary oil inclusions yield a laser ablation-multicollector-inductively...
FIGURES | View All (15)
Journal Article
Journal: AAPG Bulletin
Published: 01 November 2024
AAPG Bulletin (2024) 108 (11): 2159–2188.
... cements. All of these data are integrated by tying the geochemical results to the evolution of the nearby No. 15 fault system and burial/thermal models for key wells. The interpreted seismic data indicate that the No. 15 fault system provided major migration pathways for hydrocarbons. The hydrocarbon...
FIGURES | View All (16)
Journal Article
Published: 01 September 2024
Jour. Geol. Soc. India (2024) 100 (9): 1338–1346.
...Mingqing Huang; Qiwei Zheng; Qingling Liu; Zhong Gao ABSTRACT Waste rocks and tailings are widely applied materials in underground metal mines to backfill mined-out areas. To test the effect of low calcium fly ash on slurry fluidity and long-term strength of cemented paste backfill, orthogonal...
FIGURES | View All (8)
Journal Article
Published: 01 September 2024
Bulletin of Canadian Energy Geoscience (2024) 71 (2): 143–170.
... was found between the geomechanical properties and sedimentary facies in the Montney Formation, in contrast to the behavior of many shale formations, which we attribute to the size and compositional homogeneity of the detrital material comprising the siltstone, and to pervasive cementation at shallow burial...
FIGURES | View All (16)
Journal Article
Journal: AAPG Bulletin
Published: 01 June 2024
AAPG Bulletin (2024) 108 (6): 1149–1185.
... contents of carbonate and quartz cements, specific clay mineral types (mixed-layer I/S with Reichweite order of R = 3 and illite), and poor reservoir quality and oil productivity due to the influx of deep inorganic CO 2 dating to circa 65–44 Ma. Petrographic analyses reveal that the K 1 q 4...
FIGURES | View All (21)
Journal Article
Journal: AAPG Bulletin
Published: 01 July 2023
AAPG Bulletin (2023) 107 (7): 1137–1167.
... (>5500 m [>18,045 ft]) and has endured a complex diagenetic history. To understand the mechanisms of reservoir formation, we conduct a broad portfolio of geochemical analyses on the calcite cements that fill the pores and fractures in samples retrieved from wells penetrating the Yingshan Formation...
FIGURES | View All (16)
Journal Article
Published: 01 July 2023
Jour. Geol. Soc. India (2023) 99 (7): 906–916.
... are very hard and compact, fine-grained, sublihic arenite, and lithic greywacke types and show medium porosity (avg. 11.3%). The reservoir properties of the sandstones of both groups are controlled by various diagenetic alterations like mechanical compaction, cementation, overgrowth, authigenesis of clay...
FIGURES | View All (13)
Journal Article
Published: 01 July 2023
Jour. Geol. Soc. India (2023) 99 (7): 917–928.
... of Tipam Sandstone Sample no. Quartz Feldspar Rock Fragments Cement Mica Matrix H.M Q Mu Q Mnu Q P P Ca/Na F K Ig Met Sed C Sil C Fer C Cal Mus Bio M1 11.33 29.67 4.67 7.00 5.33 4.67 7.66 5.67 1.67 8.33 0.00 0.67 4.33 8.00 1.00 M1S 14.67 34.33...
FIGURES | View All (14)
Journal Article
Published: 01 July 2023
Jour. Geol. Soc. India (2023) 99 (7): 929–940.
... and resembles the primary matrix (proto-matrix), recrystallized primary matrix (ortho-matrix) and diagenetically produced epi-matrix of Dickinson (1970) . Among cements, silica ( Fig. 5c ) and iron oxide ( Fig. 5c and 6a ) are the two interstitial pore-filling materials found in Kopili sandstones...
FIGURES | View All (11)
Journal Article
Journal: Geophysics
Published: 12 June 2023
Geophysics (2023) 88 (4): MR185–MR194.
...Jiaxin Yu; Kenneth Duffaut; Per Avseth ABSTRACT Quantitative description of the reservoir rock stress sensitivity is critical for seismic modeling and interpretation. Laboratory studies have indicated that the wave velocity of high porosity cemented sandstone is asymmetrically much more sensitive...
FIGURES | View All (6)
Journal Article
Journal: AAPG Bulletin
Published: 01 June 2023
AAPG Bulletin (2023) 107 (6): 863–886.
... a combination of thin-section petrography, scanning electron microscopy, and mineral segmentation mapping to document rock texture, especially the amount and distribution of quartz and calcite cements. We find that samples dominated by extrabasinal grain components show isolated clusters of intergranular...
FIGURES | View All (12)
Journal Article
Journal: AAPG Bulletin
Published: 01 June 2023
AAPG Bulletin (2023) 107 (6): 929–955.
... chlorite and heulandite cements. First-generation laumontite cement (60°C–70°C) formed via heulandite transformation during eogenesis. Variable mesogenetic alteration products developed in an organic-CO 2 –based system and mainly included (1) precipitation of pore-filling chlorite, quartz, kaolinite...
FIGURES | View All (17)
Journal Article
Journal: AAPG Bulletin
Published: 01 May 2023
AAPG Bulletin (2023) 107 (5): 785–821.
... for the precipitation of carbonate cements in adjacent sandstones. Moderate and deep mudstones are mature and able to provide organic acids/CO 2 and other ions to adjacent sandstones. However, shallow mudstones are not mature and have limited mass supply capacity. Subsequent fault movement activates fluid migration...
FIGURES | View All (18)
Journal Article
Published: 05 April 2023
Journal of the Geological Society (2023) 180 (3): jgs2022-085.
... to highlight the porosity, which was estimated by eye using transmitted light optical microscopy. This also allowed the microstructure and relative age relationships of fracturing, mineralization and cementation to be determined. Collectively, the basal conglomerates and microbreccias vary significantly...
FIGURES | View All (13)