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High-pressure metamorphic rocks in the Borborema Province, Northeast Brazil: Reworking of Archean oceanic crust during proterozoic orogenies

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Geoscience Frontiers 2020年第6期11卷 2221-2242页

作者： alanielson da câmara dantas ferreira Elton Luiz dantas Ticiano JoséSaraiva dos Santos Reinhardt A.Fuck Mahyra Tedeschi Instituto de Geociências Universidade de Brasília(UnB)70910-900Brasília-DFBrazil Instituto de Geociências Universidade Estadual de Campinas(UNICAMP)Departamento de Geologia e Recursos Naturais13083-970Campinas-SPBrazil Instituto de Geoci^encias Universidade Federal de Minas Gerais(UFMG)31270-901Belo HorizonteMGBrazil

We present the first evidence of Archean oceanic crust submitted to Proterozoic high-pressure(HP)metamorphism in the South American ***-Nd and Lu-Hf isotopic data combined with U-Pb geochronological data from the campo Grande area,Rio Grande do Norte domain,in the Northern Borborema Province,reflect a complex Archean(2.9 Ga and 2.6 Ga)and Paleoproterozoic(2.0 Ga)evolution,culminating in the Neoproterozoic Brasiliano/Pan-African orogeny(ca.600 Ma).The preserved mafic rocks contain massive poikiloblastic garnet and granoblastic amphibole with variable proportions of plagioclase+diopside in symplectitic texture,typical of high-pressure *** clinopyroxene-garnet amphibolites and the more common garnet amphibolites from the campo Grande area are exposed as rare lenses within an Archean migmatite *** amphibolite lenses represent 2.65 Ga juvenile tholeiitic magmatism derived from depleted mantle sources(positive values of+3.81 to+30.66)later enriched by mantle metasomatism(negative εNd(t)values of-7.97).chondrite and Primitive Mantle-normalized REE of analyzed samples and discriminant diagrams define two different oceanic affinities,with E-MORB and OIB *** Eu anomalies(Eu/Eu*=0.75-0.95)indicate depletion of plagioclase in the *** zircon cores of 3.0-2.9 Ga in analyzed samples indicate that the Neoarchean tholeiitic magmatism was emplaced into 2923±14 Ma old Mesoarchean crust(εNd(t)--2.58 and Nd TDM=3.2 Ga)of the Rio Grande do Norte *** age of retro-eclogite facies metamorphism is not yet completely *** suggest that two high-grade metamorphic events are recognized in the mafic rocks:the first at 2.0 Ga,recorded in some samples,and the second,at ca.600 Ma,stronger and more pervasive and recorded in several of the mafic rock *** Neoproterozoic zircon grains are found in symplectite texture as inclusions in the garnet grains and represent the age of HP conditions in the *** zircon grains show a

关键词： Archean oceanic crust Proterozoic orogens Borborema province

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Effects of cryofrequence on Localized Adiposity: case Study

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Journal of Biosciences and Medicines 2022年第1期10卷 16-28页

作者： Patrícia Froes Meyer Laura Vieira Pires Diniz Ruth Gaioso cartaxo Sousa Júlio davi costa Silva Eneida de Morais carreiro Rafaella Rêgo Maia ciro dantas Soares Fernando cesar câmara Rodrigo Marcel Valentim da Silva University center of Rio Grande do Norte UNI-RN Natal Brazil Universida de Potiguar (UNP) Natal Brazil Federal University of Rio Grande do Norte (UFRN) Natal Brazil

cryofrequence is the combination of cryotherapy with radiofrequency, which promotes a “thermal shock” to the tissue, working simultaneously to skin flaccidity and localized adiposity. The efficacy of dermatological and hypodermic cryofrequency treatment was evaluated. This study reports the case of a 45-year-old woman with complaints of flaccidity and fat located in the infra-umbilical region in the preoperative period of abdominoplasty. The evaluation was performed before and after treatment through evaluation protocols, ultrasound examinations and histological findings through optic microscopy, microfocal and immunohistochemical analysis. The treatment was performed in 4 sessions, with a weekly application, using the BHS 156 FULL®—BODY HEALTH BRASIL®apparatus, the parameters were temperature of -10°c, power in 70%, duration of 8 minutes. After the surgical procedure, parts of treated and untreated abdominal tissues were removed for evaluation. In the tests performed, significant destruction of adipocytes was detected, with consequent reduction of fat and greater expression of caspase-3 in the treated tissue, being constated the macrophage increase by cD68 expression. There was improvement in flaccidity, evidenced by the significant increase in the number of fibroblasts and inflammatory cells positive for Ki67, bringing more quantity and better quality to the collagen.

关键词： cryofrequence Localized Adiposity Skin Flaccidity Abdominoplasty

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