Results 61 to 70 of about 1,267 (203)

Paleokarst shafts in the western desert of Egypt: A unique landscape

Acta Carsologica, 2013
Paleokarst shafts in the western desert of Egypt: A unique landscapeThe Eocene limestone plateau of the Western Desert of Egypt has various karst features, including shafts created during ancient wet periods.
Ashraf Mostafa
doaj   +1 more source

Multi-disciplinary approach to paleokarst occurrence in the Eocene–Oligocene succession of the Apulia Carbonate Platform (Salento, Italy)

Facies
Carbonate platforms are subject to falls of the sea level registered in the sedimentary sequences. Traces of these exposures are represented by paleokarst features such as red paleosols, speleothems, breccias and fissures filled by sediment.
Giacomo Medici, Diego Marianelli, Irene Cornacchia, F. Gori, M. Brandano   +4 more
semanticscholar   +1 more source

Paleogeomorphy evolution of the Ordovician weathering crust and its implication for reservoir development, eastern Ordos Basin

Petroleum Research, 2018
Gas reservoir development of the Ordovician weathering crust in the Ordos Basin is closely controlled by the pre-Carboniferous paleogeomorphy. Previous studies show that the paleogeomorphy is high in the west and low in the east, and the karst highland ...
Xinshan Wei, Junfeng Ren, Junxing Zhao, Daofeng Zhang, Shunshe Luo, Liubin Wei, Juanping Chen   +6 more
doaj   +1 more source

GEOMORPHOLOGY AND MORPHOGENESIS OF THE BELI LOM RIVER VALLEY [PDF]

Analele Universității din Craiova. Seria Geografie, 2011
The present paper renders the results of a geomorphology research performed in North-Eastern Bulgaria. It focusses on the geomorphology and the main stages of evolution of the Beli Lom River. On the base of field research, geology and geophysics research,
Svetla STANKOVA
doaj  

Paleokarst reservoir architecture derived from forward modeling of modern cave systems—A case study

American Association of Petroleum Geologists Bulletin
In some of the world’s largest hydrocarbon provinces, infilled and collapsed cave systems are an essential component for many paleokarst reservoirs. Conceptual modeling methods for this reservoir type are relatively sparse in the literature and often ...
B. Lønøy, C. Pennos, J. Tveranger, I. Fikos, G. Vargemezis, S. Lauritzen   +5 more
semanticscholar   +1 more source

Sequence lithofacies paleogeography and reservoir potential of the Maokou Formation in Sichuan Basin

Petroleum Exploration and Development, 2012
Based on multidisciplinary analyses of outcrops, core description and log data, two types of sequence boundary are identified, including a partially exposed unconformity surface and a drowned unconformity surface.
Mingyi HU, Zhonggui HU, Guoqi WEI, Wei YANG, Mancang LIU   +4 more
doaj   +1 more source

Karst monadnock fine characterization and reservoir control analysis: A case from Ordovician weathering paleokarst reservoirs in Lungu area, Tarim Basin, NW China

Petroleum Exploration and Development, 2017
: Based on the fine characterization of weathering crust paleokarst landform of the Ordovician Yingshan Formation in Lungu area, Tarim Basin, the size, number and reservoir controlling characteristics of karst monadnocks have been investigated ...
Yunfeng ZHANG, Fei TAN, Haizhou QU, Zhiqi ZHONG, Yong LIU, Xinsheng LUO, Zhenyu WANG, Fang QU   +7 more
doaj   +1 more source

Plio-Pleistocene Dust Traps on Paleokarst Surfaces: A Case Study From the Carpathian Basin

Frontiers in Earth Science, 2020
Plio-Pleistocene silt/clay-rich deposits and paleo-karst fissure sediments from sites of the northern and southern parts of the Carpathian Basin were investigated.
János Kovács, János Kovács, Gábor Újvári, Gábor Újvári, György Varga, Klemens Seelos, Péter Szabó, Péter Szabó, József Dezső, Nadia Gammoudi   +9 more
doaj   +1 more source

Secondary Uranium Mineral Assemblages in Carboniferous Paleokarst Infill, Um Bogma Formation, the Southern Tethyan Margin: Implications for the Arabian–Nubian Shield in Mineralogical Characterization and Supergene Enrichment

Minerals
The Lower Carboniferous Um Bogma Formation in southwestern Sinai has sixteen paleokarst structures at Allouga, Abu Thor, and Abu Zarab. Each structure contains high uranium concentrations.
Mohamed W. Abd El-Moghny, M. Helal, O. R. Elshahat, Mohamed M. I. Abaza, M. Gabr, M. Fathy, Haitham M. Ayyad   +6 more
semanticscholar   +1 more source

Developmental mechanism of advantageous Xixiangchi Group reservoirs in Leshan–Longnüsi palaeohigh

Petroleum Exploration and Development, 2008
: The Leshan–Longnüsi palaeohigh in the Sichuan Basin controlled by basement uplift underwent multistage or multicyclic syndepositional uplifting and denudation uplifting during evolvement.
Su-fen WANG, Wei LI, Fan ZHANG, Xing-zhi WANG   +3 more
doaj   +1 more source