You missed the scientific papers I showed you? Let me show you again:
Geophysical Letters
A search for iridium in the Deccan Traps and Inter-Traps
R. Rocchia, D. Boclet, V. Courtillot, J. J. Jaeger
First published: August 1988
Abstract
It has been suggested that flood basalts in the Deccan (India) might be associated with events at the Cretaceous-Tertiary boundary (KTB). A search for iridium in 47 samples from lava flows and inter-trap sediments in the Deccan yields negative results. Concentrations are not statistically different from zero, with a minimum detection level on the order of 0.1 ng.g−1 (ppb).
One would think we would see at least as much iridium in the Deccan traps as there is elsewhere. It doesn't absolutely rule out iridium coming from the traps, but it seems unlikely, especially when...
Science Advances Vol. 7, No. 9
Globally distributed iridium layer preserved within the Chicxulub impact structure
Abstract
The Cretaceous-Paleogene (K-Pg) mass extinction is marked globally by elevated concentrations of iridium, emplaced by a hypervelocity impact event 66 million years ago. Here, we report new data from four independent laboratories that reveal a positive iridium anomaly within the peak-ring sequence of the Chicxulub impact structure, in drill core recovered by IODP-ICDP Expedition 364. The highest concentration of ultrafine meteoritic matter occurs in the post-impact sediments that cover the crater peak ring, just below the lowermost Danian pelagic limestone. Within years to decades after the impact event, this part of the Chicxulub impact basin returned to a relatively low-energy depositional environment, recording in unprecedented detail the recovery of life during the succeeding millennia. The iridium layer provides a key temporal horizon precisely linking Chicxulub to K-Pg boundary sections worldwide.
Far as I know there is one case of iridium being found in large amounts in volcanic eruptions.
Science
9 Dec 1983
Iridium Enrichment in Airborne Particles from Kilauea Volcano: January 1983
Abstract
Airborne particulate matter from the January 1983 eruption of Kilauea volcano was inadvertently collected on air filters at Mauna Loa Observatory at a sampling station used to observe particles in global circulation. Analyses of affected samples revealed unusually large concentrations of selenium, arsenic, indium, gold, and sulfur, as expected for volcanic emissions. Strikingly large concentrations of iridium were also observed, the ratio of iridium to aluminum being 17,000 times its value in Hawaiian basalt. Since iridium enrichments have not previously been observed in volcanic emissions, the results for Kilauea suggest that it is part of an unusual volcanic system which may be fed by magma from the mantle. The iridium enrichment appears to be linked with the high fluorine content of the volcanic gases, which suggests that the iridium is released as a volatile IrF6.