Results 21 to 30 of about 2,318 (188)

Paleokarst coastal caves at Torricelle Hills (Lessini Mountains, Venetian Prealps, Italy)

open access: yesInternational Journal of Speleology, 2023
This paper describes a set of paleokarst caves at Torricelle Hills near Verona (Southern Alps, Italy.) At this locality, erosional surfaces and paleokarst cavities show that sedimentation of late Paleogene neritic limestones was interrupted by subaerial ...
Guido Gonzato   +4 more
doaj   +1 more source

Differential structure of Ordovician karst zone and hydrocarbon enrichment in paleogeomorphic units in Tahe area, Tarim Basin, NW China

open access: yesPetroleum Exploration and Development, 2021
Based on a large number of drilling, logging, seismic and production data, the differential structures of karst zone and hydrocarbon distribution in different paleogeomorphic units of the Tahe area, Tarim Basin, are discussed by analyzing the karst ...
San ZHANG   +6 more
doaj   +1 more source

Features of Middle-Lower Ordovician paleo-karst caves in western slope area, Tahe Oil Field, Tarim Basin

open access: yesShiyou shiyan dizhi, 2022
Seismic and drilling data were obtained to study the paleo-karst development conditions and cave developmental characteristics of the Middle-Lower Ordovician in the incised meandering canyon area on the western slope of Tahe Oilfield, Tarim Basin.
Changjian ZHANG   +2 more
doaj   +1 more source

The karst and palaeokarst of North and North-East Greenland – physical records of cryptic geological intervals

open access: yesGEUS Bulletin, 2022
Carbonate rocks of Neoproterozoic to Silurian age are abundantly distributed around the coasts of North and North-East Greenland. Palaeokarst horizons are particularly well developed within the Portfjeld Formation (Ediacaran – earliest Cambrian) and ...
M. Paul Smith, Gina E. Moseley
doaj   +1 more source

On the peritidal cycles and their diagenetic evolution in the Lower Jurassic carbonates of the Calcare Massiccio Formation (Central Apennines) [PDF]

open access: yes, 2015
This paper shows the environmental changes and high-frequency cyclicity recorded by Lower Jurassic shallow- water carbonates known as the Calcare Massiccio Formation which crop out in the central Apennines of Italy.
Brandano, Marco   +3 more
core   +1 more source

Structural Controls on Basin‐ and Crustal‐Scale Fluid Flow and Resulting Mineral Reactions

open access: yes, 2022
Geofluids, Volume 2022, Issue 1, 2022.
Enrique Gomez-Rivas   +3 more
wiley   +1 more source

Prediction of weathering paleokarst reservoirs by combining paleokarst landform with unconformity: A case study of Sinian Dengying Formation in Leshan-Longnüsi paleo-uplift, Sichuan Basin

open access: yesPetroleum Exploration and Development, 2013
Based on the research of unconformity type and distribution, and restoration of structural feature of paleo-uplift in the late sedimentary period of Sinian Dengying Formation, the evolution of paleokarst landform and karstic hydrodynamic field during ...
Jiguang TANG   +3 more
doaj   +1 more source

Hydraulic Fracturing‐Induced Seismicity

open access: yesReviews of Geophysics, Volume 58, Issue 3, September 2020., 2020
Abstract Hydraulic fracturing (HF) is a technique that is used for extracting petroleum resources from impermeable host rocks. In this process, fluid injected under high pressure causes fractures to propagate. This technique has been transformative for the hydrocarbon industry, unlocking otherwise stranded resources; however, environmental concerns ...
Ryan Schultz   +5 more
wiley   +1 more source

Provenance and geochemistry of exotic clasts in conglomerates of the Oligocene Torehina Formation, Coromandel Peninsula, New Zealand [PDF]

open access: yes, 2003
Non-marine pebble to cobble conglomerates of the lower Torehina Formation (Oligocene) crop out along western Coromandel Peninsula and overlie, with strong angular discordance, continental-margin metasedimentary rocks (Manaia Hill Group) of Mesozoic (Late
Baker C. K.   +19 more
core   +2 more sources

Tectonic Record of Deformation in Intraplate Domains: Case Study of Far‐Field Deformation in the Grands Causses Area, France

open access: yesGeofluids, Volume 2020, Issue 1, 2020., 2020
Although tectonic plates are usually considered as rigid blocks, intraplate deformation such as lithospheric buckling or diffuse brittle deformation has been recognized for a long time. However, the origin of these deformations remains puzzling. Indeed, whereas the chronology of deformation at plate boundaries can be constrained by numerous methods ...
Oriane Parizot   +8 more
wiley   +1 more source

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