@article{PAR00009956,
  title = {{D}etermination of rapid {D}eccan eruptions across the {C}retaceous-{T}ertiary boundary using paleomagnetic secular variation: {R}esults from a 1200-m-thick section in the {M}ahabaleshwar escarpment},
  author = {{C}henet, {A}. {L}. and {F}luteau, {F}. and {C}ourtillot, {V}. and {G}{\'e}rard, {M}artine and {S}ubbarao, {K}. {V}.},
  editor = {},
  language = {{ENG}},
  abstract = {{F}low-by-flow reanalysis of paleomagnetic directions in two sections of the {M}ahabaleshwar escarpment, coupled with analysis of intertrappean alteration levels shows that volcanism spanned a much shorter time than previously realized. {T}he sections comprise the upper part of magnetic chron {C}29r, transitional directions and the lowermost part of {C}29n. {L}ack of paleosecular variation allows identification of four directional groups, implying very large (40 to 180 m thick) single eruptive events ({SEE}s) having occurred in a few decades. {P}aleomagnetism allows temporal constraints upon the formation of 9 out of 23 thin red bole levels found in the sections to no more than a few decades; the two thickest altered layers could have formed in 1 to 50 ka. {T}he typical volumes of {SEE}s (corresponding to magnetic directional groups) are estimated at 3000 to 20,000 km(3), with flux rates similar to 100 km(3) a(-1), having lasted for decades. {F}lood basalt emission can be translated into {SO}(2) injection rates of several {G}t a(-1), which could have been the main agent of environmental change. {T}he total volume of {SO}(2) emitted by the larger {SEE}s could be on the order of that released by the {C}hicxulub impact. {M}oreover, each {SEE} may have injected 10 to 100 times more {SO}(2) in the atmosphere than the deleterious 1783 {L}aki eruption. {T}he detailed time sequence of {SEE}s appears to be the key feature having controlled the extent of climate change. {I}f several {SEE}s erupted in a short sequence (compared to the equilibration time of the ocean), they could have generated a runaway effect leading to mass extinction.},
  keywords = {},
  booktitle = {},
  journal = {{J}ournal of {G}eophysical {R}esearch-{S}olid {E}arth},
  volume = {113},
  numero = {{B}4},
  pages = {{B}04101},
  ISSN = {0148-0227},
  year = {2008},
  DOI = {10.1029/2006jb004635},
  URL = {https://www.documentation.ird.fr/hor/{PAR}00009956},
}