14 Northern Appalachian Magmatism: From the Precambrian to the Cretaceous (Posters)

Sunday, 17 March 2024
1:30 PM - 5:30 PM
Armory Ballroom

SULFUR EMISSIONS FROM THE CENTRAL ATLANTIC MAGMATIC PROVINCE FROM GLASSY MELT INCLUSIONS

Paper number: 14-5
Program: Theme Sessions
Time: 1:30 PM – 5:30 PM

Authors

Abstract

Sulfur emissions from the Central Atlantic Magmatic Province (CAMP) have been linked with climate disruption during the 201 Ma end-Triassic mass extinction. Available constraints on CAMP sulfur emissions are based on measurements of trace amounts of sulfur in clinopyroxene crystals, and experimentally calibrated clinopyroxene-melt sulfur partitioning. We collected fresh glass chips from central Connecticut at a previously described locality of the Fairhaven dike (Philpotts and Martello, 1986), thought to feed the Talcott basalt, the first CAMP lava to erupt in the Hartford basin. Fresh, euhedral olivine phenocrysts and subhedral to rounded glomerocrystic pyroxenes are preserved within these glassy pockets. Here we present new measurements of sulfur and chlorine in glassy melt inclusions hosted within these olivine and pyroxene phenocrysts, as well as in groundmass glass. We use these data to estimate sulfur emissions from the Talcott basalt, and compare our measured sulfur concentrations with prior estimates.

Geological Society of America Abstracts with Programs. Vol. 56, No. 1

doi: 10.1130/abs/2024NE-397525

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