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29 results

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  • Geochemistry and new zircon U–Pb geochronology of Mesoproterozoic Punugodu granite pluton, SE India: implications for anorogenic magmatism along the western margin of Nellore Schist Belt, India
  • Ch. Narshimha, V. V. Sesha Sai, U. V. B. Reddy, T. Vijaya Kumar, E. V. S. S. K. Babu, B. Sreenivas, K. S. V. Subramanyam
  • Journal: Geological Magazine / Volume 159 / Issue 6 / June 2022
  • Published online by Cambridge University Press: 22 March 2022, pp. 904-924
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    We report a new zircon U–Pb age of 1257 ± 6 Ma for the Punugodu granite (PG) pluton in the Eastern Dharwar Craton (EDC), Southern India. The Mesoproterozoic PG is alkali feldspar hypersolvus granite emplaced at shallow crustal level, as evident from the presence of rhyodacite xenoliths and hornfelsic texture developed in the metavolcanic country rocks of the Neoarchaean Nellore Schist Belt (NSB). Geochemically, the PG is metaluminous, ferroan and alkali-calcic, and is characterized by high SiO2 and Na2O + K2O, Ga/Al ratios >2.6, high-field-strength elements and rare earth element (REE) contents with low CaO, MgO and Sr, indicating its similarity to anorogenic, alkali (A-type) granite. The highly fractionated REE patterns with negative europium anomalies of PG reflect its evolved nature and feldspar fractionation. Mafic (MME) to hybrid (HME) microgranular enclaves represent distinct batches of mantle-derived magmas that interacted, mingled and undercooled within the partly crystalline PG host magma. Felsic microgranular enclaves (FME) having similar mineralogical and geochemical characteristics to the host PG most likely represent fragments of marginal rock facies of the PG pluton. The PG appears to be formed from an oceanic island basalt (OIB)-like source in an anorogenic, within-plate setting. The emplacement of PG (c. 1257 Ma) in the vicinity of Mesoproterozoic Kanigiri Ophiolite (c. 1334 Ma) shows an age gap of nearly 77 Ma, which probably suggests PG emplacement in an extensional environment along a terrain boundary at the western margin of the Neoarchaean NSB in the EDC.

Differential Diagnosis in Cytopathology
  • Differential Diagnosis in Cytopathology
  • 3rd edition
  • Edited by Ji-Weon Park, Paolo Gattuso, Vijaya B. Reddy, Shahla Masood
  • Published online: 05 March 2021
  • Print publication: 06 May 2021
  • View description
    This fully updated edition incorporates the newest classification systems, such as the Bethesda System for reporting thyroid cytopathology; the Paris System for reporting urinary cytology, and the Milan System for reporting salivary gland cytopathology. Over 1,000 high-quality color photos illustrate the key diagnostic cytological features described. Succinct bullet points condense vital information, making the text more accessible for busy clinicians. The full spectrum of infection, inflammatory, benign and malignant processes throughout the body are presented in detail, including chapters on cervical, breast, and central nervous system diagnostic criteria. Key information pearls and differential diagnosis indicators give insight from experts in the field. Not limited to light microscopic findings, many other genetic, molecular, and immunologic diagnostic modalities are covered in this essential and comprehensive resource. An online version of the book with expandable figures can be accessed on Cambridge Core, via the code printed on the inside of the cover.
Differential Diagnosis in Cytopathology
  • Differential Diagnosis in Cytopathology
  • 2nd edition
  • Edited by Paolo Gattuso, Vijaya B. Reddy, Shahla Masood
  • Published online: 05 December 2014
  • Print publication: 04 December 2014
  • View description
    The cytologic evaluation of exfoliative and fine needle aspiration material is one of the most widely used diagnostic modalities worldwide. Now thoroughly updated with new guidelines and references, and featuring more than 1000 high-quality color photomicrographs, Differential Diagnosis in Cytopathology remains the essential organ-based reference guide for practising and trainee pathologists and cytotechnologists. This new edition addresses a comprehensive variety of benign and malignant neoplastic conditions, utilizing a consistent structure with bullet-point text for quick access and assimilation. The full spectrum of infectious and inflammatory disorders are also presented in detail. The information is not limited to light microscopic findings but includes many other genetic, molecular, and immunologic diagnostic modalities, giving readers the diagnostic and clinical criteria needed when formulating a diagnosis and differential diagnosis. No other book focuses exclusively on essential diagnostic criteria, making this an essential text for pathologists, cytopathologists and cytotechnologists at all stages of their careers.

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