Results 71 to 80 of about 82,050 (301)

Post‐Stimulation Hydraulic Response and Productivity Constraints of a Low‐Productivity Carbonate Geothermal Well in the Small Intramontane Basin, Beijing Piedmont, North China

open access: yesEnergy Science &Engineering, EarlyView.
Formed ~1.4 Ga, the carbonate reservoir of the Jixian System is a key geothermal reservoir in northern China. Differential basin–mountain evolution since the Cenozoic led to distinct reservoir‐forming histories; consequently, this same reservoir shows marked productivity contrasts between intramontane basins and the large rift Bohai Bay Basin ...
Chuanqing Zhu   +6 more
wiley   +1 more source

A unique Sphenophyllum-mimicking insect in the Permian

open access: yesBMC Biology
Background Mimicry is an adaptive strategy widespread in modern ecosystems, yet its deep-time origins and evolution remain poorly understood due to the scarcity of unequivocal fossil evidence.
Yanzhe Fu   +7 more
doaj   +1 more source

Seismic Stratigraphy of a Circular Concave-Downward Structure, Chukchi Sea [PDF]

open access: yes, 2017
A circular concave-downward structure (CCDS) and its structural features and seismic facies can be observed in several 2D seismic lines imaging the Chukchi Sea planning area. The area in question is largely underexplored and the data coverage is limited.
Ruiz Lozano, Andres Hernan
core  

Replacement of Ores Recorded by Textures and Chemical Compositions of Sphalerite: An Example From the Furutobe Kuroko Deposit, Akita, Japan

open access: yesGeological Journal, EarlyView.
Coupled dissolution‐reprecipitation of early formed Cd‐, Fe‐, Ag‐ and Sb‐poor sphalerite through interaction with high‐temperature and high‐sulphur fugacity Cu‐rich fluids, responsible for the formation of the yellow ores, resulted in the formation of Cd‐, Fe‐, Ag‐ and Sb‐rich, heavily chalcopyrite‐diseased sphalerite and enrichment of critical metals ...
Manuel Nopeia   +4 more
wiley   +1 more source

Late Ordovician cephalopods from Morocco and their implications

open access: yesSwiss Journal of Palaeontology
The present paper describes the latest cephalopod fauna from the Upper Ordovician in the Anti-Atlas region, Morocco. Two species are reported herein belonging to two genera including one new species, Tafadnatoceras elfechtense sp. nov.
Xiang Fang   +12 more
doaj   +1 more source

Geology of the Upper Cretaceous and part of the lower tertiary between the Rio Aragon subordan and the Rio Gallego (Spanish Pyrenees, province of Huesca) [PDF]

open access: yes, 1968
This study deals with the stratigraphy sis forms part of the geological investigations and the tectonics of the Upper Cretaceous gations and part of the Lower Tertiary between Pyrenees, under the Rio Aragon Subordan (western boundary) and the Rio ...
Stratigraphy & paleontology   +2 more
core   +1 more source

An integrated biostratigraphy and seismic stratigraphy for the late Neogene continental margin succession in northern Taranaki Basin, New Zealand [PDF]

open access: yes, 2006
Our aim has been to develop an integrated biostratigraphy and seismic stratigraphy for the Pliocene and Pleistocene formations (Ariki, Mangaa, Giant Foresets) in northern Taranaki Basin to better understand the evolution of the modern continental margin ...
Kamp, Peter J.J.   +3 more
core   +1 more source

Thermochronologic Constraints on the Extensional History of the Ibex Hills, Southeastern Black Mountains, Death Valley, California

open access: yesGeological Journal, EarlyView.
A. Modeled T‐t paths for samples in the northern Ibex Hills, showing steady cooling throughout much of the Cenozoic, until rapid Miocene cooling. B. Weighted mean paths for each sample in this study. Note that all show a rapid cooling event at or just after 10 Ma, which is interpreted to represent exhumation as a result of regional extenstion ...
Zachariah D. Fleming
wiley   +1 more source

Inherited Depositional Topography Control on Shelf-Margin Oversteepening, Readjustment, and Coarse-Grained Sediment Delivery to Deep Water, Magallanes Basin, Chile

open access: yesFrontiers in Earth Science, 2020
A shelf-margin depositional system is the stratigraphic product of terrigenous sediment delivery to the ocean, comprising a flat to low-gradient shelf, or topset, which transitions to a steeper deep-water slope, and, ultimately, a relatively flat basin ...
Dustin B. Bauer   +4 more
doaj   +1 more source

Applicability of dinoflagellate cyst stratigraphy to the analyses of passive and active tectonic settings [PDF]

open access: yes, 1995
The notion that fluctuating tectonic stress patterns within or between continental plates directly influence the development of a given sedimentary basin is a well-established concept in geotectonics.
Stratigraphy & paleontology   +3 more
core   +1 more source

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