Results 51 to 60 of about 2,331 (192)
Distribution of Upper Paleozoic Coal Seams in the Southeastern Ordos Basin
Energies, 2022 The Ordos Basin contains abundant coal resources in the Upper Paleozoic strata. They are shallowly buried or exposed in the periphery of the basin, forming recoverable coal mines and coalbed methane resources.
Yunwen Guan +5 more
doaj +1 more source
Geofluids, Volume 2019, Issue 1, 2019., 2019 With the gradual increase in mining depth of coal fields in North China, the threat posed by karstic Ordovician limestone water to the safe stoping of mines is becoming increasingly prominent. Investigating the water‐resisting property of the filling zone on the top of the Ordovician limestone provides the key to safe mining under pressure.
Qiqing Wang +3 more
wiley +1 more source
Stable oxygen and carbon isotope compositional fields for skeletal and diagenetic components in New Zealand Cenozoic nontropical carbonate sediments and limestones: a synthesis and review [PDF]
, 1996 The stable oxygen isotope composition (d¹⁸O) of a precipitated carbonate depends mainly on the isotope composition, salinity, and temperature of the host fluid, whereas the stable carbon isotope composition (d¹³C) reflects the source of CO2 for ...
Nelson, Campbell S., Smith, Abigail M.
core +2 more sources
Geofluids, Volume 2017, Issue 1, 2017., 2017 Oil and gas have been found in the Upper Ordovician Lianglitag Formation carbonates in the Tahe Oilfield, Tarim Basin, NW China. This study documents the origin of diagenetic fluids by using a combination of petrology, SIMS, fluid inclusion, and radiogenic isotope analysis. Six stages of calcite cements were revealed.
Jiaqing Liu +4 more
wiley +1 more source
Perfiles paleokarsticos en el techo de la unidad intermedia del mioceno de la cuenca de Madrid
Estudios Geologicos, 2003 En el techo de la Unidad Intermedia del Mioceno de la Cuenca de Madrid se ha desarrollado un paleokarst temprano, somero y de forma tabular que muestra un marcado control litológico y del dispositivo de facies deposicionales en su génesis.
J. C. Cañaveras +6 more
doaj +1 more source
Fábricas diagenéticas asociadas al paleokarsts del techo de la unidad intermedia del Mioceno de la Cuenca de Madrid. [PDF]
, 1997 Los materiales carbonáticos y evaporíticos del techo de la Unidad Intermedia del Mioceno de la Cuenca de Madrid han actuado como soporte de fenómenos de karstificación temprana, cuyo desarrollo ha supuesto un cambio significativo en la evolución del ...
Calvo Sorando, José Pedro +3 more
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Characteristics of discharge at Rose and Gellért Hills, Budapest, Hungary [PDF]
, 2008 This study focuses on the discharge characteristics of the Buda Thermal Karst (Budapest, Hungary) found at the Rose and Gellért Hills. The Buda Thermal Karst is a recently active hydrothermal karst system in the heart of Budapest.
Csoma, Anita É. +2 more
core +1 more source
Geofluids, Volume 2017, Issue 1, 2017., 2017 Two fundamental forms of hypogenic karst systems (lateral stratiform hypogenic and cross‐formational fault‐vein hypogenic karst system) are distinguished mainly by differential effects of preexisting faults. In seismic cross sections, hypogenic karst systems are expressed as complex string-beads‐like seismic reflections associated with faults.
Hongtao Zhu +3 more
wiley +1 more source
Estudios Geologicos, 1997 Los materiales carbonáticos y evaporíticos del techo de la Unidad Intermedia del Mioceno de la Cuenca de Madrid han actuado como soporte de fenómenos de karstificación temprana, cuyo desarrollo ha supuesto un cambio significativo en la evolución del ...
J. C. Cañaveras +3 more
doaj +1 more source
Karst y paleokarst de Sierra Morena (Sector Ossa-Morena, Hespérico meridional) [PDF]
, 1998 Se presenta una síntesis del karst y paleokarst del sector Ossa-Morena, desarrollado sobre calizas y dolomías del Cámbrico Inferior. Su distribución abarca sectores de las provincias de Huelva, Sevilla y Córdoba.
Baena Escudero, Rafael +2 more
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