Search results for "Rift"

Structure-related geochemical (REE) and isotopic (K-Ar, Rb-Sr, δ18O) characteristics of clay minerals from Rotliegend sandstone reservoirs (Permian, …

1999

Abstract Euhedral illite cementing the gas-bearing sandstone reservoirs of the Rotliegend in the Niedersachsische rift system (northern Germany) was studied along a horst-to-graben cross-section to examine its chemical and isotopic characteristics. The data show that differentiated illite particles grew during a tectono-thermal event marked by distinct episodic hydrothermal activities along fault drains and in the poral space of sandstones at 210 Ma and at 195 to 190 Ma in horst positions, at 185 to 175 Ma in the nearby graben, and at 170 to 165 Ma in both the horst and graben. Varied REE distribution patterns and initial 87Sr/86Sr ratios (from 0.7124 to 0.7142) relative to illite-particle …

Re-enrichment of cratonic lithospheric mantle beneath an evolving rift: Mantle xenoliths from East Antarctica

2006

Four- and five-phase peridotites from a continental rift system: evidence for upper mantle uplift and cooling at the Ross Sea margin (Antarctica)

1992

Upper mantle plagioclase+spinel- and spinel-peridotite xenoliths occur in basanitic and tephritic lavas of the 2.7 my to Recent Mt. Melbourne Volcanic Field (Antarctica). This field belongs to the Cenozoic McMurdo volcanic group which is located between the deep western trough of the Ross Sea rift system and the uplifted rift shoulder of the Transantarctic Mountains. Our samples cover the transition zone between rift and shoulder. We examined texture and composition of plagioclase+spinel and normal spinel peridotites and determined temperatures and pressures of formation using the internally consistent Ca-ol/cpx and 2px-thermobarometer of Kohler and Brey (1990) and Brey and Kohler (1990). D…

Detrital zircon and micropalaeontological ages as new constraints for the lowermost tectonic unit (Talea Ori unit) of Crete, Greece

2007

The Talea Ori unit is the lowermost known tectonic unit of Crete and the most external part of the Hellenides. Its stratigraphy ranges from Late Carboniferous to Oligocene and outcrops of the lower part are only known in the Talea Ori mountains (central Crete). In this area, a black sandstone at the base of the Galinos Beds, thought to be the oldest formation, contains zircons which were dated using the single grain evaporation method. The majority of these grains yielded Late Carboniferous ages (Variscan), while a small group yielded Early Proterozoic ages. The age distribution of these zircons suggests that, at the Carboniferous–Permian boundary, not much of the older North Gondwanan base…

Tectono-stratigraphic modelling of the North Sicily continental margin (southern Tyrrhenian Sea).

2004

A two-dimensional numerical modelling that simulate the kinematic and thermal response of the lithosphere to thinning was used for the quantitative reconstruction of the late Neogene to Recent times tectonic and stratigraphic evolution of the North Sicily continental margin (southern Tyrrhenian Sea). The numerical study of the evolution of the North Sicily margin builds on the crustal image and kinematic interpretation of the margin obtained by Pepe et al. [Tectonics 19 (2000) 241] on the basis of seismic data and gravity modelling. Tectonic modeling indicate that different segments of the margin were undergoing different vertical movements, which are mainly expression of the rifting and th…

Par cilvēcisko lietu nepastāvību

1598

Teoloģiski ētiskais, vēsturiskais traktāts “Par cilvēcisko lietu nepastāvību” iesākas ar veltījumu dažādiem Rīgas rātskungiem. Par savstarpējo apmaiņu ar laipnībām var uzskatīt Dāvida Hilhena vēstuli grāmatas autoram un savukārt Georga Cīglera sacerēto dzeju par godu D. Hilhenam. G. Cīglers nopublicējis savā grāmatā arī Rostokas zinātnieka, vēsturnieka Dāvida Hitreja vēstuli autoram. Hitrejs raksta, ka neraugoties uz redzes problēmām, esot iepazinies ar G. Cīglera grāmatu (grāmata iznāca 1598 un 1599 gadā). Pazemīgie veltījumi ietekmīgām personām ieviesās arī tāpēc, ka sacerētāji tādējādi kompensēja trūkstošo autora honorāru, jo bagātie patricieši parasti parādā nepalika. Eksemplāriem atšķi…

Geschichte der Rigaer Stadtbibliothek und deren Bücher

1937

Inhalt: Schriften zur Bibliotheks- und Büchergeschichte. Vorbemerkung des Bearbeiters I. Einführung in die Geschichte der Rigaer Stadtbibliothek und ihre Bestände II. Die mittelalterlichen Bücher der Rigaer Stadtbibliothek III. Neugefundene Bruchstücke des Rigaer niederdeutschen Gesangbuch des aus dem 16. Jahrhundert IV. Drei mittelalterliche Rigaer Handschriften in der Universitätsbibliothek zu Uppsala.

Mutamento del giudice e rinnovazione della prova: la Corte costituzionale esorbita dai confini accusatori

2020

The “Judge of the laws” delivers to the Parliament punctuals directives to give concreteness to the reasonable duration of the trial. What is at stake is the right to renew the evidence in the event of a change of the judge, which is drastically reduced to prevent it from being used merely for dilatory purposes. The Author criticizes the decision in question, fearing a dangerous drift: the renewal only of the “useful” evidence.

Pleistocene allopatric differentiation followed by recent range expansion explains the distribution and molecular diversity of two congeneric crustac…

2021

AbstractPleistocene glaciations had a tremendous impact on the biota across the Palaearctic, resulting in strong phylogeographic signals of range contraction and rapid postglacial recolonization of the deglaciated areas. Here, we explore the diversity patterns and history of two sibling species of passively dispersing taxa typical of temporary ponds, fairy shrimps (Anostraca). We combine mitochondrial (COI) and nuclear (ITS2 and 18S) markers to conduct a range-wide phylogeographic study including 56 populations of Branchinecta ferox and Branchinecta orientalis in the Palaearctic. Specifically, we investigate whether their largely overlapping ranges in Europe resulted from allopatric differe…

L’écriture et le graphisme à l’ère de la linguistique psychologique

2016

This study deals with the conception of “writing” within the German humanities during the « psychological turn » of the last half of the XIXth - the beginning of the XXth centuries. The focal point is “graphism” and “writing” understood as “expressive movements” (Ausdrucksbewegungen), this notion being bound to the concept of “verbal gesture” within the trend of “psychological linguistics” (1850-1930). Inspired initially by the morphological and physiognomonic tradition (J. Lavater, J. W. Goethe, J. Engel, C. Carus, Th. Piderit), this conception considers language as a particular kind of “expressive movements”. This vision comes back to the German psychology of consciousness elaborated by J…