Constraints on the thermal evolution of the Adriatic margin during Jurassic continental break-up: U–Pb dating of rutile from the Ivrea–Verbano Zone, Italy

The Ivrea–Verbano Zone (IVZ), northern Italy, exposes an attenuated section through the Permian lower crust that records high-temperature metamorphism under lower crustal conditions and a protracted history of extension and exhumation associated partly with the Jurassic opening of the Alpine Tethys ocean. This study presents SHRIMP U–Pb geochronology of rutile from seven granulite facies metapelites from the base of the IVZ, collected from locations spanning ~35 km along the strike of Paleozoic fabrics. Rutile crystallised during Permian high-temperature metamorphism and anatexis, yet all samples give Jurassic rutile U–Pb ages that record cooling through 650–550 °C. Rutile age distributions are dominated by a peak at ~160 Ma, with a subordinate peak at ~175 Ma. Both ~160 and ~175 Ma age populations show excellent agreement between samples, indicating that the two distinctive cooling stages they record were synchronous on a regional scale. The ~175 Ma population is interpreted to record cooling in the footwall of rift-related faults and shear zones, for which widespread activity in the Lower Jurassic has been documented along the western margin of the Adriatic plate. The ~160 Ma age population postdates the activity of all known rift-related structures within the Adriatic margin, but coincides with extensive gabbroic magmatism and exhumation of sub-continental mantle to the floor of the Alpine Tethys, west of the Ivrea Zone. We propose that this ~160 Ma early post-rift age population records regional cooling following episodic heating of the distal Adriatic margin, likely related to extreme lithospheric thinning and associated advection of the asthenosphere to shallow levels. The partial preservation of the ~175 Ma age cluster suggests that the post-rift (~160 Ma) heating pulse was of short duration. The regional consistency of the data presented here, which is in contrast to many other thermochronometers in the IVZ, demonstrates the value of the rutile U–Pb technique for probing the thermal evolution of high-grade metamorphic terrains. In the IVZ, a significant decoupling between Zr-in-rutile temperatures and U–Pb ages of rutile is observed, with the two systems recording events ~120 Ma apart.

Calibration of cosmogenic noble gas production based on ³⁶Cl-³⁶Ar ages. Part 2. The ⁸¹Kr-Kr dating technique

We calibrated the ⁸¹Kr-Kr dating system for ordinary chondrites of different sizes using independent shielding-corrected ³⁶Cl-³⁶Ar ages. Krypton concentrations and isotopic compositions were measured in bulk samples from 14 ordinary chondrites of high petrologic type and the cosmogenic Kr component was obtained by subtracting trapped Kr from phase Q. The thus-determined average cosmogenic ⁷⁸Kr/⁸³Kr, ⁸⁰Kr/⁸³Kr, ⁸²Kr/⁸³Kr, and ⁸4Kr/⁸³Kr ratiC(Lavielle and Marti 1988; Wieler 2002). The cosmogenic ⁷⁸Kr/⁸³Kr ratio is correlated with the cosmogenic 22Ne/21Ne ratio, confirming that ⁷⁸Kr/⁸³Kr is a reliable shielding indicator. Previously, ⁸¹Kr-Kr ages have been determined by assuming the cosmogenic production rate of ⁸¹Kr, P(⁸¹Kr)c, to be 0.95 times the average of the cosmogenic production rates of ⁸⁰Kr and ⁸²Kr; the factor Y = 0.95 therefore accounts for the unequal production of the various Kr isotopes (Marti 1967a). However, Y should be regarded as an empirical adjustment. For samples whose ⁸⁰Kr and ⁸²Kr concentrations may be affected by neutron-capture reactions, the shielding-dependent cosmogenic (⁷⁸Kr/⁸³Kr)c ratio has been used instead to calculate P(⁸¹Kr)/P(⁸³Kr), as for some lunar samples, this ratio has been shown to linearly increase with (⁷⁸Kr/⁸³Kr)c (Marti and Lugmair 1971). However, the ⁸¹Kr-Kr ages of our samples calculated with these methods are on average ~30% higher than their ³⁶Cl-³⁶Ar ages, indicating that most if not all the ⁸¹Kr-Kr ages determined so far are significantly too high. We therefore re-evaluated both methods to determine P(⁸¹Kr)c/P(⁸³Kr)c. Our new Y value of 0.70 ± 0.04 is more than 25% lower than the value of 0.95 used so far. Furthermore, together with literature data, our data indicate that for chondrites, P(⁸¹Kr)c/P(⁸³Kr)c is rather constant at 0.43 ± 0.02, at least for the shielding range covered by our samples ([⁷⁸Kr/⁸³Kr]c = 0.119–0.185; [22Ne/21Ne]c = 1.083–1.144), in contrast to the observations on lunar samples. As expected considering the method used, ⁸¹Kr-Kr ages calculated either directly with this new P(⁸¹Kr)c/P(⁸³Kr)c value or with our new Y value both agree with the corresponding ³⁶Cl-³⁶Ar ages. However, the average deviation of 2% indicates the accuracy of both new ⁸¹Kr-Kr dating methods and the precision of the new dating systems of ~10% is demonstrated by the low scatter in the data. Consequently, this study indicates that the ⁸¹Kr-Kr ages published so far are up to 30% too high.

Na 50 Nachlass Arthur Schopenhauer - 'Schopenhauer-Archiv', 210 - Mitteilung von A. Scheuter über die psychische Krankheit von Pfarrer Grim

u.a.: Heilanstalt in Eltville;

8° Hs 210 - De statu animae

Vorbesitzer: Senckenbergische Bibliothek Frankfurt am Main

Na 1 Nachlass Max Horkheimer, 455 - Korrespondenzen u.a. mit Margo H. Wolff und Karl August Wittfogel (p. V 173, 210-429)

19 Briefe zwischen Lisa Witherell (geb. Richter) und Max Horkheimer, 1963-1971; 2 Briefe zwischen Werner Wittayer (stud. phil.) und Max Horkheimer, 1964; 4 Drucksachen vom Landtagspräsidenten Otto Witte an Max Horkheimer, 1952-1954; 2 Briefe an Otto Witte von Max Horkheimer, 1952-1953; 1 Todesanzeige, 1963; 4 Briefe zwischen der Studentin Ulrike Wittenberg und Max Horkheimer, 1972-1973; 4 Briefe zwischen dem Professor Karl A. Wittfogel und Max Horkheimer, 1972; 3 Briefe zwischen dem Oberstudiendirektor Dr. Kurt Debus und Max Horkheimer, 1967; 3 Briefe zwischen David Wodlinger und Max Horkheimer, 1960; 2 Briefe zwischen Dr. Herman Wohlstein und Max Horkheimer, 1965; 16 Briefe an Johanna Woitschach von Max Horkheimer, 1970-1973 (die Briefe an Max Horkheimer wurden zurückverlangt); 1 Brief von Ernst Wolf an Max Horkheimer, San Francisco, 1954; 3 Briefe zwischen dem Diplom-Psychologen Heinz E. Wolf und Max Horkheimer, 1958; 13 Briefe zwischen dem Oberstudiendirektor Oskar Wolfenstädter und Max Horkheimer, 1968-1969; 4 Briefe zwischen der Ordensschwester Katherine Wolff und Max Horkheimer, 1970-1971; 25 Briefe zwischen Margo H. Wolff und Max Horkheimer, 1962-1973; 11 Briefe zwischen dem Professor Max Wolff und Max Horkheimer, 1960; 3 Briefe zwischen dem Professor Manfred Wolfson und Max Horkheimer, 1971; 6 Briefe von der Physiotherapeutin Helga Wolk an Max Horkheimer, 1970-1971; 13 Briefe zwischen Hedwig G. de Wollenberger und Max Horkheimer, 1966-1970; 1 Brief an den Professor Günther Wollheim von Max Horkheimer, 1965; 4 Briefe zwischen Johanna Wopperer-Ege und Max Horkheimer, 1970; 5 Briefe zwischen Anton Wopperer und Max Horkheimer, 1969-1970; 3 Briefe an die World Future Society von Max Horkheimer, 1969-1973; 2 Briefe zwischen dem World Jewish Congress und Max Horkheimer, 1970; 2 Briefe zwischen dem Professor Theodor Würtenberger und Max Horkheimer, 1964; 3 Briefe zwischen der Würtembergischen Landesbibliothek und Max Horkheimer, 1969; 16 Briefe zwischen Rösle Wüstholz und Max Horkheimer, 1951-1959; 2 Briefe zwischen Christoph Wulf und Max Horkheimer, 1973; 1 Brief an Jssy Wygoda von Max Horkheimer, 1964; 2 Briefe zwischen Dr. Hans von Wyl und Max Horkheimer, 1971; 2 Briefe zwischen Jacques Wyler und Max Horkheimer, 1973; 1 Brief von Gisela Wysocki an Max Horkheimer, o.J. (1973?);

Ms.Ff.F.Stoltze 3. 210 - Brief von Robert Oettel an Friedrich Stoltze

Dank für ein Gedicht in der Frankfurter Latern, Zu seinem Enkel Otto Kienitz

Na 1 Nachlass Max Horkheimer, 599 - Korrespondenzen u.a. mit Friedrich Pollock und Karl August Wittfogel (p. VI 42, 1-210)

Briefwechsel zwischen Max Horkheimer, Frederick Pollock und Karl August und Olga Wittfogel; 1 Brief von Karl August Wittfogel an Stephen Duggan, 02.08.1936; 2 Briefe an Max Horkheimer von Karl August Wittfogel, November 1937; 1 Brief von Karl August Wittfogel an Carter, 16.07.1936; 1 Brief an den American Consul General (Tientein, China) von Max Horkheimer, 03.04.1936; 1 Brief von Max Horkheimer an Owen Lattimore, 28.12.1935;

Ausst. 210 - HIerinen sind begriffen vier bücher von menschlicher Proportion durch Albrechten Dürer von Nürenberg erfunden vnd beschriben zu nutz allen denen so zu diser kunst lieb tragen

Vorbesitzer: Heinrich Anton Cornill-d'Orville (Exlibris im Vorderdeckel)

Ms. lat. oct. 210 - Certificat du Comité de Surveillance Révolutionnaire

Vorbesitzer: O. Borelli

Suite : Prélude, Pavane, Chanson de Louis XIII varié, Gavotte et Musette, Tambourin ; für Pianoforte und Violine ; op. 210

von Joachim Raff

Is dating violence associated with substance use and sexual risk behaviors among urban, minority, middle school youth

Background. One in 4 adolescents reports some form of dating violence each year. Dating violence among high school adolescents has been linked with several morbidity issues. However, the association between dating violence and sexual risk and/or substance use among young adolescents has rarely been studied.^ Methods. Research hypotheses were tested using a secondary data analysis from a HIV, STI, pregnancy prevention intervention study for urban middle school students.^ Results. At baseline, 21% of youth reported experiencing physical ADV victimization, 48.2% reported non-physical victimization, and 52.6% report any victimization. After adjusting for race/ethnicity, gender, and age ever having sex, alcohol use, and illicit drug use were significantly associated with several forms of ADV.^ Conclusions. Dating violence appears to be associated with early initiation of sexual behavior, as well as alcohol and drug use. Few interventions address ADV among middle school youth. Early interventions that prevent dating violence are needed. ^

The Need for School-Based Teen Dating Violence Prevention

Schools have several competing demands, and often suffer from inefficient access to needed resources. Thus, the addition of any program into an already overtaxed school system must be met with convincing evidence that 1) a need or problem exists and is relevant to the education of students, 2) the problem is amenable to change, and 3) addressing the problem is in the best interest of educators and students. The purpose of the present paper is to present a case for inclusion of teen dating violence prevention programs in middle and high schools. We also discuss a recent survey of 219 employees of a suburban school district in southeast Texas. Specifically, we examined their perceived need for and appropriateness of a school-based dating violence prevention program. The anonymous internet-based survey revealed that a majority of participants believed that teen dating violence was a problem, 19% reported having observed an instance of teen dating violence, and 82% believed school to be an appropriate outlet for the implementation of a dating violence prevention program.

Building an Evidence-Based Approach to Address Dating Violence Prevention

Purpose: To discuss the approach and recommendations related to the adoption of school based curriculum for violence prevention. Findings: Preliminary assessments suggest that middle and high school youth experience a variety of forms of violence in social and dating relationships. Such experiences have negative academic, behavioral and emotional consequences. Conclusions: The authors have clearly illuminated the need for addressing the phenomenon of dating violence. The field could benefit from more robust evidenced-based investigations that substantiate that interventions have an impact beyond attitudinal changes toward the behavior. Such academic endeavors will provide a platform to validate the inclusion of such information in a school based curriculum as act as a call for action for broad based interventions.