Publication and about | tamoghnajugeo

Personal pilot and small scale research

Tourmaline bearing gneiss and granite near MCT, Sikkim Himalaya: Implications for investigation. Treeja Lepcha, Anil Ghimiray, Tamoghna Saha. Abstract accepted for International Geological Congress 2020, New Delhi. (Conference cancelled). Accepted September, 2019
Saha, T., 2020. Importance of study of tourmaline bearing vein and gneiss near Main central Thrust (MCT), Sikkim Darjeeling Himalaya: Open Journal of Geology, 10 (5).
Saha, T., 2020. A SHORT REPORT ON PETROLOGY OF AMPHIBOLITE LENS FROM MCT: A LOW TEMPERATURE ACTIVITY POST HIGH TEMPERATURE EVENTS? International journal of research and analytical reviews.
Saha, T, 2021. Characterization of tourmaline from Sikkim Darjeeling Himalaya at main central thrust and implications. International journal of research and analytical reviews.
Potential for mineralization of porphyritic Cu Au deposit near Pedong: study of tourmaline bearing rock (preprint)
The mingling textures in granitoids and porphyritic rocks are sometimes present in field which we seldom observe. The process of their formation can be closely correlated with the rheology depending upon density and viscosity. On the other hand, there are roles of fluid dynamics in this complex interplay in regions where magma shows the texture. as well as variable mineralogy. The energy and mass balance in this scenario is complicated as well as genesis of new minerals like peritectic phases can be argued during these events. This study will focus on the numerical analyses and a few field evidences from a locale.
Thesis (PhD) and related paper and abstract(s)
Saha, T. and Karmakar, S., 2015, Petrotectonic framework of granitoids and associated granulites at Nagavalli shear zone (NSZ), Eastern Ghats Belt: evidence of a late transpression orogeny. Journal of Earth System Sciences, 124, 4, 707-727
Saha, T., and Karmakar, S., 2013, Petrotectonic framework of granitoids and associated granulites from Visakhapatnam domain at Nagavalli shear zone, Eastern Ghats Belt: evidence of a subsequent transpression orogeny. Abstract published in International association for Gondwana Research Conference Series 16
Saha, T., and Karmakar, S., 2017, Petrogenesis and physicochemical signatures of megacrystic charnocktite and leucogranitoid from Nagavalli

shear zone of Eastern Ghats Belt , India: Implications for a Grenvillian accretion-collision orogenesis. Abstract publisehd in Humboldt Kolleg, 2017, 'Earth and metarial sciences for sustainable societal development. ISBN -978-93-82549-29-1

Workshops attended (curricular and extracurricular)

1. LAICPMS (NGRI, 2011)

2. THERMOCALC KHARAGPUR

3. GASSHUKU, KOLKATA (IFSK) and others

Past and current research works:

My previous reserach work was on the generation and characterization megacrystic granitoid and associated rock types from Nagavalli Shear Zone (NSZ), Eastern Ghats Belt (EGB), India. It includes the study of different generations of deformation and metamorphism in the lithotypes. The tectonic framework of emplacement of granitoids was also a prerequisite. Subsequent petrotectonic evolution and the tectonic implication are also important to note down as we want to build up a petrological, mineralogical as well as structural evolutionary pattern of lithotypes, principally the granitoids. The timing of different events circumscribing the above facts and their context in terms of Grenvillian orogenesis, suggested by earlier workers from EGB was also under further detailing. What terms it dictate in terms of orogenic cycles and continental crustal processes and reworking will be important for noting down throughout our current research. Possible publications are on hault. Thesis submitted in the exact same phenomena.

The generation of the granitoids and their emplacement was investigated noting the rheological characters and the dykes and injections of one over annother. The areal extension shows that it was a batholitic complex comprising plutons. A minimum temperature of around 880 degree was estimated from various analytical algorithms. That also suites with the igneous zircon grains preserved in polyzonal zircon cores. Assimilation and fractional crystallization was also substantiated from geochemical trace element modelling. Evidences of garnet generation were found from the signs of elements like Nb. However, fractionation of plagioclase was also established from major elements during ascent. The behavior of mingling at later stages rather than mixing also supported the assimilation process. The mafic microgranuler enclaves proved to be the earliest pieces of the granitoids found.

Currently active for investigation related to Himalayan orogeny as can be observed from the abstract and publication. As far as there had been problems. The start up and fresh works with the Himalayan orogeny had been under development through the busy schedule. Structural, ore genesis related studies had been done with communication (Tourmaline) around Pedong-Lanbha-Rhenok-Rongli.

Primary Channel: SnakeEyes; https://www.youtube.com/channel/UCHRXWRbS_Ps-qy-cQM92sjw

Secondary Channel: GEOS87.;