Far Eastern Avalonia: Its chronostratigraphic structure revealed by SHRIMP zircon ages from Upper Carboniferous to Lower Permian volcanic rocks (drill cores from Germany, Poland, and Denmark)

2007 ◽  
Author(s):  
Christoph Breitkreuz ◽  
Allen Kennedy ◽  
Marion Geißler ◽  
Bodo-Carlo Ehling ◽  
Jürgen Kopp ◽  
...  
Keyword(s):  
Volcanic Rocks ◽  
Lower Permian ◽  
Upper Carboniferous ◽  
Far Eastern ◽  
Shrimp Zircon ◽  
Drill Cores

scholarly journals Stratigraphy and depositional history of the Upper Palaeozoic and Triassic sediments in the Wandel Sea Basin, central and eastern North Greenland

1989 ◽  
Vol 143 ◽  
pp. 21-45
Author(s):  
L Stemmerik ◽  
E Håkansson
Keyword(s):  
Early Carboniferous ◽  
Upper Permian ◽  
Lower Permian ◽  
Late Permian ◽  
The West ◽  
Depositional History ◽  
Lower Carboniferous ◽  
Upper Carboniferous ◽  
Lithostratigraphic Units ◽  
History Of

A lithostratigraphic scheme is erected for the Lower Carboniferous to Triassic sediments of the Wandel Sea Basin, from Lockwood Ø in the west to Holm Land in the east. The scheme is based on the subdivision into the Upper Carboniferous - Lower Permian Mallemuk Mountain Group and the Upper Permian - Triassic Trolle Land Group. In addition the Upper Carboniferous Sortebakker Formation and the Upper Permian Kap Kraka Formation are defined. Three formations and four members are included in the Mallemuk Mountain Group. Lithostratigraphic units include: Kap Jungersen Formation (new) composed of interbedded limestones, sandstones and shales with minor gypsum - early Moscovian; Foldedal Formation composed of interbedded limestones and sandstones -late Moseovian to late Gzhelian; Kim Fjelde Formation composed of well bedded Iimestones - late Gzhelian to Kungurian. The Trolle Land Group includes three formations: Midnatfjeld Formation composed of dark shales, sandstones and limestones - Late Permian; Parish Bjerg Formation composed of a basal conglomeratic sandstone overlain by shales and sandstones - ?Early Triassic (Scythian); Dunken Formation composed of dark shales and sandstones - Triassic (Scythian-Anisian). The Sortebakker Formation (new) is composed of interbedded sandstones, shales and minor coal of floodplain origin. The age is Early Carboniferous. The Kap Kraka Formation (new) includes poorly known hematitic sandstones, conglomerates and shales of Late Permian age.

scholarly journals Lower Permian basaltic agglomerate from the Tsengel River valley, Mongolian Altai

2020 ◽  
Vol 51 ◽  
pp. 1-11
Author(s):  
Kristýna Hrdličková ◽  
Altanbaatar Battushig ◽  
Pavel Hanžl ◽  
Alice Zavřelová ◽  
Jitka Míková
Keyword(s):  
River Valley ◽  
Lower Permian ◽  
Basalt Lava ◽  
Volcanic Arc ◽  
Lower Carboniferous ◽  
Upper Carboniferous ◽  
Mongolian Altai ◽  
Icp Ms ◽  
Volcaniclastic Rocks ◽  
Data Yield

A new occurrence of Permian volcanic and volcaniclastic rocks in the Mongolian Altai south of the Main Mongolian Lineament was described between soums of Tugrug and Tseel in Gobi-Altai aimag. Studied vitrophyric pyroxene basalt lies in a layer of agglomerate and amygdaloidal lavas, which is a part of NE–SW trending subvertical sequence of varicolored siltstones and volcaniclastic rocks in the Tsengel River valley. This high-Mg basalt is enriched in large ion lithophile elements, Pb and Sr and depleted in Nb and Ta. LA-ICP-MS dating on 44 spots reveals several concordia clusters. The whole rock geochemistry of sample fits volcanic arc characteristic in the geotectonic discrimination diagrams. Dominant zircon data yield Upper Carboniferous and Permian magmatic ages 304.4 ± 2.3 and 288.6 ± 1.9 Ma. Two smaller clusters of Upper Devonian (376 ± 4.7 Ma) to Lower Carboniferous ages (351.9 ± 3.5 Ma) indicate probably contamination of ascending magmatic material. Youngest Triassic age found in three morphologically differing grains reflects probably lead loss. Described high-Mg basalt lava represents sub-aerial volcanism in volcanic arc environment developed over the N dipping subduction zone in the southwestern Mongolia in the time span from Uppermost Carboniferous to Permian during terminal stage of its activity.

scholarly journals Lower Moscovian limestones of the Bogdashan Range (NW China) as an indicator of cessation of arc magmatism in the Junggar region

2019 ◽  
Vol 27 (1) ◽  
pp. 57-78
Author(s):  
D. V. Alexeiev ◽  
Yu. S. Biske ◽  
A. V. Djenchuraeva ◽  
B. Wang ◽  
O. L. Kossovaya ◽  
...  
Keyword(s):  
Volcanic Rocks ◽  
Foreland Basin ◽  
Northwest China ◽  
Island Arc ◽  
Tien Shan ◽  
Lower Permian ◽  
Carbonate Sediments ◽  
Tropical Zone ◽  
Middle Carboniferous ◽  
Marine Facies

The field revision of the Carboniferous and Lower Permian stratigraphy of the northern Bogdashan (South Junggar, Northwest China) shows that the Lower to Middle Carboniferous island arc volcanic rocks, widely developed in this region, are overlapped everywhere by carbonate and terrigenous-carbonate sediments, containing occasional lava flows and overlain up the section by thick terrigenous series practically devoid of volcanic rocks. The deposition of limestone occurred at the stage of dying off of a volcanic arc, and the question of their age is of fundamental importance for dating this event. Carbonates are represented by facies of lagoons, shoals, and bioherms that formed on the leveled surface of the arc and on the slopes of the last active volcanoes. Bioherms are Waulsortian mounds and are mainly composed of algal limestones and carbonate mud. There are no framestones composed of corals and sponges (chaetetids) typical of the tropical zone. The facies of shallow crinoid-fusulinid limestones typical of the adjacent territories of the Southern Tien Shan and Tarim are poorly represented. Paleogeographically, the position of bioherms corresponds to the northern boundary of the realm of Pennsylvanian reefs. On the basis of foraminifers, brachiopods, and corals, the age of carbonates is early Moscovian (ca. 315–310 Ma). Cessation of island-arc volcanism, followed by the accumulation of limestone in Bogdashan, occurred sub-synchronously with formation of the West Junggar (Bayingou) suture and may reflect docking of the Bogdashan arc to the Yili active margin of the Kazakhstan continent. Further subsidence of Bogdashan and adjacent regions of the Junggar and Turfan basins, which was somewhat slower at the end of the Carboniferous and more intense in the Early and Middle Permian, may reflect the development of the foreland basin that formed along the northern flank of the Tien Shan orogen. Marine facies were locally preserved in this basin until the Artinskian (ca. 285 Ma), and later the Junggar and Turfan basins lost connection to the ocean and developed in continental environments.

scholarly journals First record of tetrapod footprints from the Carboniferous Mesters Vig Formation in East Greenland.

2016 ◽  
Vol 64 ◽  
pp. 69-76
Author(s):  
Jesper Milàn ◽  
Hendrik Klein ◽  
Sebastian Voigt ◽  
Lars Stemmerik
Keyword(s):  
Natural History ◽  
North Africa ◽  
Morphological Difference ◽  
First Record ◽  
Lower Permian ◽  
Upper Carboniferous ◽  
History Museum ◽  
East Greenland ◽  
Continental Deposits ◽  
Significant Morphological Difference

A single slab with Late Palaeozoic tetrapod footprints from East Greenland has been housed at the Natural History Museum of Denmark for decades without scientific notice. The specimen comes from the Mesters Vig Formation of northern Scoresby Land in East Greenland and contains a monospecific assemblage of tetrapod footprints that we assign to Limnopus Marsh 1894. As there is no significant morphological difference from other records of this ichnogenus from North America, Europe and North Africa, the described tetrapod footprints can be referred to eryopoid temnospondyl trackmakers. Limnopus is well-known from Upper Carboniferous and Lower Permian continental deposits of palaeoequatorial Pangea. Identification of Limnopus tracks is in agreement with the supposed Late Carboniferous age of the Mesters Vig Formation and thereby also the first evidence of Carboniferous tetrapods from Greenland.

A further strange Archaeorthoptera from the Moscovian of Nord-Pas-de-Calais (France) (Insecta, Polyneoptera)

Zootaxa ◽  
2021 ◽  
Vol 5047 (2) ◽  
pp. 165-170
Author(s):  
ANDRE NEL ◽  
PATRICK ROQUES ◽  
HERVE DUQUESNE
Keyword(s):  
Lower Permian ◽  
Upper Carboniferous ◽  
Northern France

The new Archaeorthoptera Duquesnia gallica gen. et sp. nov. Nel & Roques, is described from the upper Carboniferous of Northern France. It shows several putative synapomorphies with the three genera Contracladus Dvořák et al., 2021 (Pennsylvanian of Germany), Nugonioneura (lower Permian of USA), and Avionugonioneura from the Moscovian of Avion (France).  

La question des conditions probables du climat de l'Autunien et du Saxonien de l'Europe centrale et occidentale

1961 ◽  
Vol S7-III (5) ◽  
pp. 463-467 ◽  
Author(s):  
Horst Falke
Keyword(s):  
Middle Permian ◽  
Lower Permian ◽  
Prevailing Wind ◽  
Great Care ◽  
Atmospheric Conditions ◽  
Humid Climate ◽  
Upper Carboniferous ◽  
Sedimentary Deposits ◽  
Hot Humid Climate ◽  
Desert Climate

Abstract The similarity of upper Carboniferous and Autunian (lower Permian) floras and of faunas, and most of the Autunian sediments, indicates a hot, humid climate interrupted by several dry periods during the Autunian. Saxonian (middle Permian) fauna and sediments show increasing dryness without reaching actual desert climate until the end of the epoch. Conditions differed from basin to basin during both the Autunian and the Saxonian, and relief greatly influenced the climate. Thus flora, fauna, and climate require interpretation with great care. Textures of eolian sedimentary deposits of the Permian give some information concerning prevailing wind directions and atmospheric conditions, but paleomagnetic conditions are poorly known.

Cement Geochemistry of Photozoan Carbonate Strata (Upper Carboniferous-Lower Permian), Finmark Carbonate Platform, Barents Sea: Erratum

2003 ◽  
Vol 73 (2) ◽  
pp. 336-336
Author(s):  
S.N. Ehrenberg ◽  
N.A.H. Pickard ◽  
T.A. Svana ◽  
N.H. Oxtoby
Keyword(s):  
Barents Sea ◽  
Carbonate Platform ◽  
Lower Permian ◽  
Upper Carboniferous

An Upper Carboniferous-Lower Permian silicified wood in the Miocene conglomerate from the western Mecsek Mts. (southern Hungary)

2000 ◽  
Vol 2000 (4) ◽  
pp. 193-204 ◽  
Author(s):  
Marc Philippe ◽  
György Szakmány ◽  
Csaba Gulyas-Kis ◽  
Sandor Józsa
Keyword(s):  
Lower Permian ◽  
Upper Carboniferous
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