Ashima Saikia
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View article: ZTF25abjmnps (AT2025ulz) and S250818k: A Candidate Superkilonova from a Sub-threshold Sub-Solar Gravitational Wave Trigger
ZTF25abjmnps (AT2025ulz) and S250818k: A Candidate Superkilonova from a Sub-threshold Sub-Solar Gravitational Wave Trigger Open
On August 18, 2025, the LIGO-Virgo-KAGRA collaboration reported gravitational waves from a sub-threshold binary neutron star merger. If astrophysical, this event would have a surprisingly low chirp mass, suggesting that at least one neutro…
View article: Lunar geochemistry from X-ray line flux ratios using CLASS on Chandrayaan 2
Lunar geochemistry from X-ray line flux ratios using CLASS on Chandrayaan 2 Open
Global lunar chemical maps are essential for understanding the origin and evolution of the Moon, its surface characteristics, and its potential for resource extraction. Lunar elemental abundance maps have been derived using X-ray and gamma…
View article: Kala-azar and the contestations of its nomenclature
Kala-azar and the contestations of its nomenclature Open
This review examines how the epidemic of kala-azar was recorded in the medical registers of Assam under various debated names, stirring the British colonial state to trace its origins and its identity. Inquiries were focused on establishin…
View article: Controlling kala azar in Assam
Controlling kala azar in Assam Open
By exploring the state responses to kala azar in Assam during the early twentieth century, this review examines how, following the discovery of the parasite, efforts to halt the disease took on new forms, as questions about its communicabi…
View article: Tracing the vector
Tracing the vector Open
The initial theory of miasma and malnutrition being responsible for kala azar was dismantled by researchers who identified the causative parasite as Ancylostoma duodenale , suggesting the disease was naturally present in the human body. Fu…
View article: Editorial
Editorial Open
View article: Early treatment modalities and responses to Kala-azar in the 1920s in Eastern India
Early treatment modalities and responses to Kala-azar in the 1920s in Eastern India Open
From the 1920s, there was a shift in the treatment modalities with the presence of small dispensaries in rural areas that still partially relied on quinine, along with establishment of specialized kala-azar treatment centers. The initial u…
View article: Cost Analysis of DPP4 and SGLT2 Inhibitors - “Dilemma of the Prescribing Physician - Which Brand to Choose?”
Cost Analysis of DPP4 and SGLT2 Inhibitors - “Dilemma of the Prescribing Physician - Which Brand to Choose?” Open
Diabetes mellitus (DM) is a complex and heterogeneous group of chronic metabolic diseases causing dreaded complications increasing human sufferings, and a costly disease to manage in low/middle-income countries, which is burdensome for the…
View article: Petrogenesis of high-Mg andesites from the Proterozoic Shillong Basin, Northeast India: evidence for continuation of the Central Indian Tectonic Zone to the Assam-Meghalaya Gneissic Complex and its implications for the Columbia supercontinent reconstruction
Petrogenesis of high-Mg andesites from the Proterozoic Shillong Basin, Northeast India: evidence for continuation of the Central Indian Tectonic Zone to the Assam-Meghalaya Gneissic Complex and its implications for the Columbia supercontinent reconstruction Open
This study provides comprehensive geochemical and petrological data for the newly discovered high-magnesium andesites (HMAs) from the Shillong Group of rocks in the Proterozoic Shillong Basin of the Assam-Meghalaya Gneissic Complex (AMGC).…
View article: Anorthosite and associated gabbronorite plutons of Barabar hills in Chotanagpur granite gneiss complex (CGGC), eastern India: Estimation of parental melt for gabbronorite using equilibrium distribution method (EDM)
Anorthosite and associated gabbronorite plutons of Barabar hills in Chotanagpur granite gneiss complex (CGGC), eastern India: Estimation of parental melt for gabbronorite using equilibrium distribution method (EDM) Open
The small plutons of anorthosite and associated gabbronorite exposed near Barabar hills form a component of Chotanagpur granite gneiss complex (CGGC) in eastern India. Plagioclase (>90 vol %) make up the majority of anorthosite rock with m…
View article: Origin of basaltic rocks of Nagaland-Manipur Hill Ophiolite (NMHO) complex in North-Eastern India: Inferences from mantle melting models.
Origin of basaltic rocks of Nagaland-Manipur Hill Ophiolite (NMHO) complex in North-Eastern India: Inferences from mantle melting models. Open
Basaltic samples from Nagaland-Manipur Hill Ophiolite (NHMO) complex in north-eastern India comprise predominantly of plagioclase with small amounts of pyroxene and exhibit porphyritic texture. In whole rock Zr/Ti vs. Nb/Y discrimination d…
View article: Nature and origin of anorthosite enclaves within Proterozoic granite of Chotanagpur Granite Gneiss Complex of Eastern India
Nature and origin of anorthosite enclaves within Proterozoic granite of Chotanagpur Granite Gneiss Complex of Eastern India Open
The Central Indian Tectonic Zone (CITZ) is a Proterozoic suture along which the Northern and Southern Indian Blocks are inferred to have amalgamated, forming the Greater Indian Landmass. The Chotanagpur Granite Gneiss Complex (CGGC) repres…
View article: Mafic rocks with back-arc E-MORB affinity from the Chotanagpur Granite Gneiss Complex of India: relicts of a Proterozoic Ophiolite suite
Mafic rocks with back-arc E-MORB affinity from the Chotanagpur Granite Gneiss Complex of India: relicts of a Proterozoic Ophiolite suite Open
The Proterozoic Chotanagpur Granite Gneiss Complex (CGGC) at the northern boundary of the Central Indian Tectonic Zone (CITZ) of the eastern Indian shield preserves relics of fossilized oceanic back-arc crust. We describe the field, petrog…
View article: Back-arc basin origin for the basalts of the South Andaman Island Ophiolite (India)
Back-arc basin origin for the basalts of the South Andaman Island Ophiolite (India) Open
Petrological, mineral chemical and geochemical characteristics are reported for the basalts of South Andaman ophiolite suite (India) of Cretaceous age to infer its petrogenesis, magma source characteristics and tectonic setting.In the fiel…
View article: Viscous dilation as a mechanism of magma mixing in the Ghansura Rhyolite Dome of Bathani volcano-sedimentary sequence, Eastern India
Viscous dilation as a mechanism of magma mixing in the Ghansura Rhyolite Dome of Bathani volcano-sedimentary sequence, Eastern India Open
The comingled mafic-felsic rocks of the Ghansura Rhyolite Dome of Bathani volcano-sedimentary sequence, eastern India, have preserved veins of iron oxide. These veins are transporting iron oxide from the mafic zones into the adjacent felsi…
View article: Mafic-felsic magma interactions in the Bathani volcanic-plutonic complex of Chotanagpur Granite Gneiss Complex, eastern India: implications for assembly of the Greater Indian Landmass during the Proterozoic
Mafic-felsic magma interactions in the Bathani volcanic-plutonic complex of Chotanagpur Granite Gneiss Complex, eastern India: implications for assembly of the Greater Indian Landmass during the Proterozoic Open
View article: Synneusis: does its preservation imply magma mixing?
Synneusis: does its preservation imply magma mixing? Open
The Ghansura Felsic Dome (GFD) occurring in the Bathani volcano-sedimentary sequence was intruded by mafic magma during its evolution leading to magma mixing. In addition to the mafic and felsic rocks, a porphyritic intermediate rock occur…
View article: Titanite-centered ocellar texture: A petrological tool to unveil the mechanism facilitating magma mixing
Titanite-centered ocellar texture: A petrological tool to unveil the mechanism facilitating magma mixing Open
The titanite-centered ocellar texture is a rarely observed texture from magma mixing and mingling zones. This work provides a synthesis of petrographical observations and mineral-chemical data to understand the genesis of this texture. The…