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Abstract

The organic carbon (OC)-rich, black shale succession of the Middle Triassic Bravaisberget Formation in Spitsbergen contains scattered dolomite-ankerite cement in coarser-grained beds and intervals. This cement shows growth-related compositional trend from non-ferroan dolomite (0–5 mol % FeCO3) through ferroan dolomite (5–10 mol % FeCO3) to ankerite (10–20 mol % FeCO3, up to 1.7 mol % MnCO3) that is manifested by zoned nature of composite carbonate crystals. The d13C (-7.3‰ to -1.8‰ VPDB) and d18O (-9.4‰ to -6.0‰ VPDB) values are typical for burial cements originated from mixed inorganic and organic carbonate sources. The dolomite-ankerite cement formed over a range of diagenetic and burial environments, from early post-sulphidic to early catagenic. It reflects evolution of intraformational, compaction-derived marine fluids that was affected by dissolution of biogenic carbonate, clay mineral and iron oxide transformations, and thermal decomposition of organic carbon (decarboxylation of organic acids, kerogen breakdown). These processes operated during Late Triassic and post-Triassic burial history over a temperature range from approx. 40°C to more than 100°C, and contributed to the final stage of cementation of the primary pore space of siltstone and sandstone beds and intervals in the OC-rich succession.

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Authors and Affiliations

Krzysztof P. Krajewski
Ewa Woźny
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Abstract

Reliable data analysis is one of the hardest tasks in sciences and social sciences. Often misleading and sometimes puzzling results arise when the analysis is done without regard for the special features of the data. In this exposition, I will focus on designing new statistical tools to deal with some prominent questions in Finance and Economics. In particular, I will talk about the following. (1) How to characterize the randomness of variables, motivated by a problem in the pricing of financial options. (2) Uncovering the relation between interest rates on different maturities, now and in the future; the "term structure of interest rates". (3) Modelling the unconventional nonlinear long-memory dynamics that arise from a general-equilibrium economic model, and their implications for exchange rates, stock market indexes, and all macroeconomic variables; with recommendations for trading in financial markets, but also for the design of macroeconomic stabilization policies by governments.

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Karim M. Abadir
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Abstract

Tadeusz Rittner steered clear of political themes in his dramas with the single excep-tion of the Wrogowie bogaczy (The Enemies of the Rich). First performed in 1921, the play exposes the insane madness of social (Bolshevik) revolution. At the same time, though, the tragic horror is handled with ironic distance and diverted into absurd grotesque. Moreover, Rittner invests the individual scenes and exchanges between the characters with hints and references that turn the story into a playful game with the theatrical traditions, including the familiar set of plot drivers, i.e. the pursuit of power, love/eroti-cism and art/imagination. For all its cleverness, the play, when staged at the Słowacki Theatre in Cracow, turned out a complete failure. One simple reason for it was that Rittner’s broad, generalized vision failed to meet the current demand for a more con-crete reenactment of historical events.
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Authors and Affiliations

Sabina Brzozowska
1
ORCID: ORCID

  1. Wydział Filologiczny Uniwersytetu Opolskiego

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