February-2017 Seminars

Date & Time :2017-02-21 16:00:00
Speaker :Dr. Amitava Patra
Post Doctorol Fellow
Area :PRPGDN
Venue :Ground Floor Lecture Hall

Abstract

The Jaisalmer basin is the eastern extension of the shelf part of the Indus Basin and represents a more or less central part of the "West Rajasthan Shelf"tectonic province that is located to the west of the Aravalli ranges. The Paleogene succession of the Jaisalmer basin has hydrocarbon potential. This succession is dominantly represented by calcareous and argillaceous rocks with a subordinate proportion of arenites in the basal part. The facies associations suggest a complete 2nd order cycle of transgression-regression of the sea from shoreface to tidal flat in the Jaisalmer pericratonic basin. Provenance of the late Paleocene sandstone of the Jaisalmer basin has been determined by petrographic and heavy minerals analysis supported by paleocurrent study.Q-F-L and Qm-F-Lt diagrams suggest for a provenance at the margin of the craton interior and transitional continental. All these suggest that the provenance was dominated by low to medium grade metamorphic and volcanic rocks of the Aravalli Supergroup, Jurassic succession and the Deccan basalts which were denuded during late Paleocene.

Date & Time :2017-02-17 00:16:00
Speaker :Dr. Bhalamurugan Sivaraman
Area :PRAMOP
Venue :Thaltej Room No. 6 (Main building)

Date & Time :2017-02-17 14:30:00
Speaker :Dr. Santosh Kumar Das
Area :PRTHPH
Venue :Room No. 469

Abstract

The heavy quarks, charm and bottom, constitutes a unique probe of the quark gluon plasma (QGP) properties. Both at RHIC and LHC energies a puzzling relation between the nuclear modification factor RAA(pT) and the elliptic flow v2(pT) related to heavy quark has been observed which challenged all the existing models. We discuss how the temperature dependence of the heavy quark drag coefficient is responsible to address for a large part of such a puzzle along with the full solution of the Boltzmann collision integral for the momentum evolution of heavy quarks in the medium. Ultra-relativistic Heavy-Ion Collision (HIC) also generates very strong initial magnetic field. Since the heavy quark are produced at the early stage of HICs, we argue that their dynamics will be affected by such a strong magnetic field and we demonstrate that the directed flow, v1 , of heavy quarks is a superior probe to estimate the magnetic field generated in non- central HICs. We show that the resultant effects entail a significantly large v1 of charm quarks which is about two order of magnitude larger than the light quarks v1 and can be measured at experiments.

Date & Time :2017-02-14 16:00:00
Speaker :Dr. Sanjeev Kumar
Associate Professor
Area :PRPGDN
Venue :Ground Floor Lecture Hall

Date & Time :2017-02-09 16:00:00
Speaker :Prof. M. Azam
Area :PRTHPH
Venue :Room No. 469

Abstract

Compact stars such as neutron stars and black holes are gravitationally bound many body systems. We investigate the importance of short and long range part of gravity for such systems. From our analysis, we conclude that the true essence of gravity lies with the long range nature of the interaction.

Date & Time :2017-02-07 16:00:00
Speaker :Dr.Upasana Banerji
Post Doctorol Fellow
Area :PRPGDN
Venue :Ground Floor Lecture Hall

Abstract

Sea level varied throughout the geological past where eustatic and/or tectonic change played significant role in controlling the sea level. Unlike glacial and interglacial periods, no major sea level fluctuations have been observed during mid-late Holocene period. Thus, reconstruction of local sea level history rather than accepting global sea level change remains a challenge. Various studies have addressed mid-late Holocene sea level changes but only few could delineate the tectonic component involved in it. Saurashtra coast provides an ideal platform to study Holocene land-sea interactions. The southern Saurashtra coast consists of extensive mudflats which can provide a continuous record of sea level change. Sulphur isotope (delta 948;34S) has played a crucial role in constraining the biogeochemical cycle in modern environment and proven to be a valuable tool in unravelling the early history of earth surface oxidation. The talk will address local tectonic event deciphered from sulfur isotopes supported by productivity and redox proxies that resulted in local sea level change during mid-late Holocene period.

Date & Time :2017-02-07 16:30:00
Speaker :Sowmya K.
Post Doc
Area :PRUSOB
Venue :USO Seminar Hall