Rapid cooling history of a Neotethyan ophiolite: Evidence for contemporaneous subduction initiation and metamorphic sole formation

2019 ◽  
Vol 131 (11-12) ◽  
pp. 2011-2038 ◽  
Author(s):  
Osman Parlak ◽  
István Dunkl ◽  
Fatih Karaoğlan ◽  
Timothy M. Kusky ◽  
Chao Zhang ◽  
...  
Keyword(s):  
Oceanic Crust ◽  
Carbonate Platform ◽  
Alkali Basalts ◽  
Tholeiitic Magma ◽  
Subduction Initiation ◽  
Suprasubduction Zone ◽  
Isparta Angle ◽  
History Of ◽  
Ophiolitic Rocks ◽  
Age Range

AbstractThe Beyşehir-Hoyran Nappes, including Mesozoic carbonate platform rocks, deep-sea sediments, and ophiolite-related units, crop out extensively on the western limb of the Isparta Angle in the Central Taurides, Turkey. The ophiolite-related rocks are represented by variably serpentinized harzburgitic mantle tectonites, tectonically underlain by a subophiolitic metamorphic sole and mélange. The harzburgitic mantle tectonites and metamorphic sole are intruded by undeformed isolated dikes. Protoliths of the metamorphic sole are similar to within-plate alkali basalts and associated sediments. The isolated dikes were geochemically derived mainly from tholeiitic magma and, to a lesser extent, from alkaline magma. Five isolated dike samples yielded U-Pb ages ranging from 90.8 ± 1.6 Ma to 87.6 ± 2.1 Ma (zircon) and from 102.3 ± 7.4 Ma to 87.5 ± 7.9 Ma (titanite). Seven amphibolite samples yielded U-Pb age ranges of 91.1 ± 2.1–88.85 ± 1.0 Ma (zircon) and 94.0 ± 4.8–90.0 ± 9.4 Ma (titanite) and a 40Ar-39Ar age range of 93.7 ± 0.3–91.4 ± 0.4 Ma (hornblende). U-Pb and 40Ar-39Ar ages of mineral phases with different closure temperatures (∼900–500 °C) from the isolated dikes and metamorphic sole rocks are almost identical and overlapping within 1σ, suggesting that both the magmatic growth of oceanic crust and formation of metamorphic sole were contemporaneous and cooled very rapidly. Hence, all the data should be interpreted as the crystallization ages of the ophiolite and metamorphic sole pair. Genesis of suprasubduction zone–type oceanic crust, genesis and exhumation of the metamorphic sole, and postmetamorphic dike emplacement within the Inner Tauride Ocean can be best explained by subduction initiation and rollback processes during the Late Cretaceous based on petrological and geochronological data obtained from the ophiolitic rocks of the Beyşehir-Hoyran Nappes.

Syphilis among men who have sex with men attending a large HIV clinic in Trinidad

2021 ◽  
pp. 095646242199719
Author(s):  
Robert Jeffrey Edwards ◽  
Isshad John ◽  
Selena Todd ◽  
Leon-Omari Lavia ◽  
David Musa ◽  
...  
Keyword(s):  
Logistic Regression ◽  
Chart Review ◽  
Laboratory Data ◽  
Previous History ◽  
History Of ◽  
Review Study ◽  
Sex With Men ◽  
Associated Risk Factors ◽  
Living With Hiv ◽  
Age Range

A chart review study was conducted to determine the prevalence of syphilis and explore the associated risk factors among men who have sex with men (MSM) who attended a large HIV clinic in Trinidad during the period January–December 2019. Patients were routinely screened for syphilis annually, and demographic, clinical, and laboratory data were extracted from the medical records. Descriptive and bivariate analyses were performed, and factors significantly associated with a syphilis diagnosis were assessed using multivariate logistic regression. During the period, 218 MSM were seen, age range 19–67 years, and median age 34.0 years. The prevalence of syphilis was 41.3% (90/218), and 71.1% (64//90) of these infections were asymptomatic. Multivariate analysis using logistic regression showed that MSM living with HIV in the 30–34 years old-age group (OR, 4.32; 95% CI, 1.04–18.02), and those with a previous history of treated syphilis (OR, 10.18; 95% CI, 4.60–22.53) were more likely to be diagnosed with syphilis. The prevalence of syphilis is high among MSM attending the HIV clinic in Trinidad, and most of these infections were asymptomatic; hence, targeted and sustained interventions to reduce syphilis transmission are urgently required. Repeat episodes of syphilis may play a role in the transmission dynamics of syphilis in MSM.

Constraining the slip rate of Jurassic rift faults through the drowning history of a carbonate platform

Terra Nova ◽  
2021 ◽  
Author(s):  
Santantonio Massimo ◽  
Cipriani Angelo ◽  
Fabbi Simone ◽  
Meister Christian
Keyword(s):  
Carbonate Platform ◽  
Slip Rate ◽  
History Of

scholarly journals Application of a Polymerase Chain Reaction Assay for Detection of Proliferative Enteritis-Affected Swine Herds

1996 ◽  
Vol 8 (2) ◽  
pp. 181-185 ◽  
Author(s):  
Patricia K. Holyoake ◽  
Gary F. Jones ◽  
Peter R. Davies ◽  
Dennis L. Foss ◽  
Michael P. Murtaugh
Keyword(s):  
Polymerase Chain Reaction ◽  
Chain Reaction ◽  
Pcr Assay ◽  
Nursery Pigs ◽  
Clinically Normal ◽  
Source Of Infection ◽  
History Of ◽  
Polymerase Chain ◽  
Swine Herds ◽  
Age Range

A polymerase chain reaction (PCR) assay was used to confirm the presence of ileal symbiont (IS) intracellularis in 3 swine herds with a history of proliferative enteritis (PE). Two pooled fecal specimens, each comprising 5 individual stool samples, were collected from pen floors to screen for the presence of IS intracellularis and determine the age range of pigs shedding the organism. IS intracellularis was detected in the feces of clinically normal 10–25week-old grower/finisher pigs, indicating that this age range of pigs was the main source of infection for younger nursery pigs. Shedding continued without clinical disease when 10–100 g/ton of tylosin or 10 g/ton of chlortetracycline was added to the feed. PCR testing of pooled fecal samples can be used to identify groups of pigs affected with PE. The results of this study indicate that this PCR assay has the potential to accurately assess the IS intracellularis infection status of swine herds and the association of IS intracellular-is with PE and growth performance.

A suite of alkali basalts and gabbros associated with the Hare Bay Allochthon of western Newfoundland

1977 ◽  
Vol 14 (3) ◽  
pp. 346-356 ◽  
Author(s):  
R. A. Jamieson
Keyword(s):  
Oceanic Crust ◽  
Continental Margin ◽  
Upper Mantle ◽  
Ultramafic Rocks ◽  
Alkali Basalts ◽  
Crust And Upper Mantle ◽  
Bay Area ◽  
Close Proximity ◽  
Thrust Sheets

The Hare Bay Allochthon of northwestern Newfoundland consists of a series of sedimentary, volcanic, metamorphic, and ultramafic rocks which was emplaced over a Cambro-Ordovician continental margin as several thrust sheets. It probably represents a continental margin sequence overridden by oceanic crust and upper mantle. The Partridge Point gabbro, Cape Onion volcanics, and Ireland Point Volcanics, which now occur in the Maiden Point, Cape Onion, and St. Anthony tectonic slices respectively, appear to be closely related on petrographic and chemical grounds. Olivine, titanaugite, kaersutite, and plagioclase indicate that these rocks formed as a single suite of hydrous alkali basalts, possibly as part of a seamount near a continental margin. This relationship provides a link between the lower sedimentary and the upper igneous-metamorphic structural slices of the allochthon and implies that most of the transported rocks in the Hare Bay area evolved in close proximity to each other.

scholarly journals Sleep terrors antecedent is common in adolescents with migraine

2013 ◽  
Vol 71 (2) ◽  
pp. 83-86 ◽  
Author(s):  
Libânia Melo Nunes Fialho ◽  
Ricardo Silva Pinho ◽  
Jaime Lin ◽  
Thais Soares Cianciarullo Minett ◽  
Maria Sylvia de Souza Vitalle ◽  
...  
Keyword(s):  
Pain Intensity ◽  
Sleep Disorders ◽  
Consecutive Series ◽  
Healthy Controls ◽  
Adolescent Population ◽  
Sleep Terrors ◽  
Headache Diary ◽  
History Of ◽  
Age Range

Migraines and sleep terrors (STs) are highly prevalent disorders with striking similarities. The aim of this study was to evaluate the effect of the antecedent of STs by comparing adolescents suffering from migraines with healthy controls in a large consecutive series. METHODS: All patients were subjected to a detailed headache questionnaire and were instructed to keep a headache diary during a two-month period. The age range was 10 to 19 years. The diagnosis of STs was defined according to the International Classification of Sleep Disorders. RESULTS: A total of 158 participants were evaluated. Of these participants, 50 suffered from episodic migraines (EMs), 57 had chronic migraines (CMs) and 51 were control subjects (CG). Participants who had a history of STs had significantly more migraines than participants who did not. CONCLUSIONS: Migraine is strongly associated with a history of STs in the adolescent population independent of demographics and pain intensity.

scholarly journals OUTCOME OF CEREBRAL CONTUSIONS DUE TO TRAUMATIC BRAIN INJURY

2020 ◽  
Vol 11 (1) ◽  
pp. 39-43
Author(s):  
Zubair Ahmed Khan ◽  
Habib sultan ◽  
Amir Aziz ◽  
Shahrukh Rizvi ◽  
Tauqeer Ahmed ◽  
...  
Keyword(s):  
Traumatic Brain Injury ◽  
Brain Injury ◽  
Hospital Stay ◽  
Traffic Accidents ◽  
Road Traffic ◽  
Road Traffic Accidents ◽  
Male And Female ◽  
Duration Of Hospital Stay ◽  
History Of ◽  
Age Range

ABSTRACT:BACKGROUND & OBJECTIVE: To compare the results of surgically operated vs conservatively treated patients of cerebral contusions due to traumatic brain injury. METHODOLOGY: This comparative study was conducted from January 2012 to December 2014 at the department of Neurosurgery, PGMI Lahore General Hospital, Lahore. A total of 50 patients were included in this study of both gender (male and female) and in the age range of 15-65 years. In our study 20 patients were managed conservatively while other 30 patients were operated for cerebral contusions. The mode of injury in our study was road traffic accidents and history of falls. RESULTS: Out of 50 patients, there were 41 (82%) males and 09 (18%) female patients. Their age ranged from 15 - 65 years. In this study the overall mean age is 38.36 years. The maximum numbers of patients were in their third and fourth decades of life. In our study the duration of hospital stay in conservatively managed patients was longer as compared to surgically treated patients who were discharged earlier. Mortality rate in surgically managed patients having a GCS ranged between 09 to 12 was very low contrary to the conservatively managed group, similarly the rate of delayed contusion formation and edema was also low in surgically managed patients as compared to those who were managed conservatively. CONCLUSION: Surgically managed patients of cerebral contusions in traumatic brain injury has better outcome and decreased hospital stay as compared to conservatively managed patients.

scholarly journals Surgical management of vesicovaginal fistula repair: Our experience.

2020 ◽  
Vol 27 (09) ◽  
pp. 1872-1877
Author(s):  
Mumtaz Rasool ◽  
Mudasar Saeed Pansota ◽  
Muhammad Shehzad Saleem ◽  
Fariha Mumtaz ◽  
Shafqat Ali Tabassum
Keyword(s):  
Fistula Formation ◽  
Time Interval ◽  
Vaginal Repair ◽  
Medical College ◽  
Recurrent Fistula ◽  
Clinical Control ◽  
Abdominal Repair ◽  
History Of ◽  
Clinical Control Trial ◽  
Age Range

Objectives: The results of our study would generate useful baseline database which would help the surgeons to manage these fistulae and their related complications properly. Study Design: Non-randomized Clinical Control Trial study. Setting: Department of Urology, Bahawal Victoria Hospital, Bahawalpur and Shahida Islam Medical College, Lodhran. Period: From July 2015 to June 2016. Material & Methods: Total 150 women with vesico-vaginal fistula (VVF) on cystoscopy of either age were selected. Patients with history of recurrence of fistula, multiple fistulae, radiation and severe vaginal scarring were excluded. The transvaginal management was approached in cases of simple fistula, VVF located at trigone of bladder while transabdominal route was preferred when the fistula site could not be easily accessed per vagina, when VVF was above trigone or when the VVF was complex. These patients were followed for 6 weeks at 2 week time interval. Results: Age range in this study was from 20 to 60 years with mean age of 38.18 ± 10.64 years. Majority of patients were (41.72%) with medium sized fistula. In 92 patients, abdominal repair was done while in 52 patients vaginal repair was done. Unsuccessful repair was seen in 14 (9.33%), infection in 25 (16.67%) and recurrent fistula formation in 21 (14.0%) patients. Conclusion: This study concluded that the frequency of unsuccessful repair and recurrent fistula is more after vaginal repair compared to abdominal repair while infection rate was more after abdominal repair.

scholarly journals Overview of Cordilleran oceanic terranes and their significance for the tectonic evolution of the northern Cordillera

2021 ◽  
Author(s):  
A Zagorevski ◽  
C R van Staal ◽  
J H Bédard ◽  
A Bogatu ◽  
D Canil ◽  
...  
Keyword(s):  
Continental Margin ◽  
Tectonic Evolution ◽  
Middle Triassic ◽  
Passive Margin ◽  
Suprasubduction Zone ◽  
Ophiolitic Rocks ◽  
Juvenile Crust ◽  
Tectonic Framework ◽  
Tectonic Reconstructions ◽  
Stratigraphic Nomenclature

Ophiolite complexes are an important component of oceanic terranes in the northern Cordillera and constitute a significant amount of juvenile crust added to the Mesozoic Laurentian continental margin during Cordilleran orogenesis. Despite their tectonic importance, few systematic studies of these complexes have been conducted. Detailed studies of the pseudostratigraphy, age, geochemistry, and structural setting of ophiolitic rocks in the northern Cordillera indicate that ophiolites formed in Permian to Middle Triassic suprasubduction zone settings and were obducted onto passive margin sequences. Re-evaluation of ophiolite complexes highlights fundamental gaps in the understanding of the tectonic framework of the northern Cordillera. The previous inclusion of ophiolite complexes into generic 'oceanic' terranes resulted in significant challenges for stratigraphic nomenclature, led to incorrect terrane definitions, and resulted in flawed tectonic reconstructions.

The Valanginian history of the eastern part of the Getic Carbonate Platform (Southern Carpathians, Romania): Evidence for emergence and drowning of the platform

2016 ◽  
Vol 66 ◽  
pp. 11-42 ◽  
Author(s):  
Mihaela Grădinaru ◽  
Iuliana Lazar ◽  
Ioan I. Bucur ◽  
Eugen Grădinaru ◽  
Emanoil Săsăran ◽  
...  
Keyword(s):  
Carbonate Platform ◽  
History Of ◽  
Southern Carpathians
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