Chicxulub: recreating an event

The premise

A direct impact would leave different traces. Delayed in the water, the body vaporizes itself; on touching the bottom, it bursts. This mode — marine explosion instead of direct impact — better explains the megaliths ~100 km away, and it needs no multiple bodies: the global iridium is already accounted for and the impactor was one.

The event, phase by phase

0. The impactor data

~10 km, ~20 km/s, CO-type carbonaceous (~2.9 g/cm³), ~60° oblique from the northeast. Crater 180–200 km. 66.043±0.011 Ma. Energy ≈ 3×10²³ J (literature: ~4.2×10²³ J; the model range 10²³–10²⁵ J does not change the order of magnitude of the partition).

1. Crossing the water model

100 m of water in 5 milliseconds. Slowdown ~0.3% (mass ratio 1:300 — the water does not stop it). But the ram pressure, 400 GPa, exceeds its strength a thousandfold: it fragments yet arrives compact (expanding meters in 5 ms). Ablated nose (~70 µm thermal penetration), cold interior, wrapped in its own vapor. Anchor: the d/H criterion for marine impacts (Shuvalov; Artemieva & Shuvalov 2002, SOVA): with d > H the water column barely affects the cratering flow. Here d/H = 10 km / 0.1 km = 100 — by published criterion, the water stops nothing.

2. Contact and partition model

It bursts against the seafloor. Roughly half downward — ~540 GPa shock at contact, ~6 GPa at 30 km, past the elastic limit — and half upward: it vaporizes the 100 m of water (7×10²¹ J, 2% of the total) and the rest feeds the atmosphere. The impactor vaporizes itself in the shock. Anchor: published shock decay for water impacts (isobaric core ~2 diameters, ~250 GPa near the surface → ~5 GPa at 6 diameters): our 540→6 GPa falls in the same order — the global shocked-quartz record is fed with margin.

3. The vapor blanket hypothesis

The crater is born under vapor, not under water. The sea returns in month 0–1 (condensation + lateral inflow), not in hours. Initial quenching is ~40× slower than with immediate flooding → ~5 °C more at 700 m at 200 kyr (modest). What matters is the chemistry: the first recharge is not seawater but hot, distilled, sulfatic condensate from vaporized anhydrite.

4. The first-year race open

Three transients with no coupled model: vapor blanket (cools slower) vs seismic permeability — global M~11 shaking opens fractures far beyond what is measured today — (cools faster) vs tsunami (violent return). The early thermal profile is decided by this race. Declared open node.

5. Plume and atmosphere JCEA theory

The explosive energy overloads the atmosphere; evaporation breeds more lightning. Vapor on a global scale, redistributed by rotation (Coriolis, jets — the moving sphere): moisture varies by zone (rain, floods, landslides, dam bursts); climate shift forces off-season migration; lightning ignites the dry zones; some condensed water was toxic and hot. Prolonged lightning over the hot ocean patch (analog: Hunga Tonga 2022).

6. Return of the sea data + model

The tsunami does not just flood: it builds the aquifer. The resurge breccia (suevite, 20–35% porosity) is the most permeable unit — the one breathing recharge for 8 Myr. The event manufactures its own plumbing. M0077A records it (Gulick et al., PNAS 2019): the upper 90 m of suevite were deposited as resurge (settling + seiches); the lower rock records the first day of the Cenozoic with tsunami evidence. The two returns of water: (a) minutes, the rim wave leaves the excavation point; (b) hours, the resurge returns — wrecking the bubble (closing the sulfur window), violent second quench, depositing the upper suevite; (c) days–weeks, the crater stays too hot to hold liquid water; (d) month 0–1, the sea stays — the "return of the sea" is not waiting for water, it is waiting for the crater to accept water.

7. The hot phase: 150–500 kyr data

Measured (Pickersgill et al., 2026): ≥250 °C at 700 m in granitic basement, marine recharge through the breccia. Submarine vortex like a hurricane, ~10 km eye hypothesis: entrainment suction + Coriolis spin (Ro~1 at 21.45°N); it insulates the core → ~10% less heat loss → ~11% longer hot phase. Vortex pressure on rock: 128 Pa vs 8 MPa — nil as a heat source (the piezoelectric chain was discarded on budget: 3 microkelvin ceiling). EM emissions remain as a possible diagnostic signal, not a source.

8. Transition: 0.5–4 Myr data + model

Cooling and carbonate burial: 100 m → ~20 m of water by infill (the 66→58 Ma eustatic fall is tens of meters, no ice). Tides rework at 20 m. Recharge ceases ~4 Myr: from flushing to stagnant.

9. The tail: 4–8 Myr data

Conductive decline + geothermal gradient (70 °C/km). Ar-Ar ages to 58 Ma: the longest-lived impact hydrothermal system on record.

10. The regional cascade JCEA theory

No single global mechanism: each zone responds in its own way. Widening knowledge, not explaining everything.

11. Megaliths ~100 km JCEA theory

This mode (marine explosion) explains them better than direct impact.

The sulfur mechanism

"Sulfur is the only thing the temperature lets settle." — JCEA

As the hot vapor bubble begins to condense and solidify, sulfur deposits — everything else stays vaporized or is extracted. That deposition is the deep coupling: the footprint left by the impact. The bubble kept depositing sulfur until the tsunami caused by the same impact arrived: the tsunami closes the window and the cold flood caps the layer.

The eye as a fractionation column JCEA theory: the eye of the submarine hurricane served to evaporate and extract as well as to deposit certain molecules — deposition and extraction of the light ones; sulfur deposits, the light ones are drawn up and out.

Isotopic fingerprint data (Rodiouchkina et al., Nat. Commun. 2025): target anhydrite reads δ³⁴S = +18.5 ± 1.4‰; onshore cores replicate it (+17 to +19‰). But M0077A — the center of the system — is the outlier: δ³⁴S from −17.2 to +8.5‰, with no anhydrite or gypsum in its stratigraphy. The sulfur at the center is not the rock's sulfur: it is processed and fractionated — exactly the signature the eye column predicts. Independent convergence: the same study concludes reduced contribution of sulfur to the mass extinction — less sulfur reached the stratosphere than modeled. The literature already says the sulfur did not all go up; this mechanism says where it stayed: in the bubble and the hydrothermal system.

Closed connections (sourced)

What the literature already had, and the model now ties together:

1. The water does not slow it (d/H = 100): Shuvalov; Artemieva & Shuvalov 2002 (SOVA) — with d > H the water column barely affects the cratering flow.
2. The shock feeds the record: published decay (isobaric core 2L, 250 GPa → 5 GPa at 6L) — our 540→6 GPa falls in the right order.
3. The center's sulfur is not the rock's: δ³⁴S +18.5‰ vs −17.2/+8.5‰ (Rodiouchkina et al., Nat. Commun. 2025).
4. The resurge is in the core: upper 90 m of suevite = resurge deposit (Gulick et al., PNAS 2019).
5. The sulfur horizon was already described: hydrothermal sulfides Fe-Ni-Co-Cu-Pb-Zn + Pt at 616–618 mbsf in M0077A (Claeys et al., GSA 2017).
6. The sky cleans in days: anhydrite vapor → SO₃ → acid rain (Ohno et al., Nat. Geosci.).
7. Melt: ~10⁴ km³ for 20 km impactors (Melosh & Ivanov, Geology 2003) — our contact feeds it with margin.
8. Volatilization/condensation already seen: Fe-Zn-Cu isotopes in M0077A (VUB 2019) — the community already sees the process; the eye gives it the mechanism.

Calculations (run on the lab's computer)

• Sulfur mass balance model: vaporized 325 ± 130 Gt (Artemieva et al. 2017) minus 67 ± 39 Gt that reached the global atmosphere (Rodiouchkina et al. 2025) = ~258 Gt missing. The crater trap sequestered ~26 to ~130 Gt = 8–40% of the vaporized (0.026 wt% average excess S over the 140,000 km³ altered already traps 100 Gt; M0077A observes 0.002–4 wt%). Honest bracket, not a measurement.
• Fractionator eye model (Rayleigh δ³⁴S): the +8.5‰ end is reached with 86–99% condensed in one stage; the −17.2‰ end is unreachable in one stage → second step: thermochemical sulfate reduction (TSR), fractionating 10–25‰. The column fractionates and the hot system reduces.
• First reactor model: SO₃ + H₂O → H₂SO₄; pH ~0.7–3.7 across brackets of 0.1–10% of S dissolved in 10–100 km³ of condensate. Distilled, sulfatic, acidic condensate, >250 °C → seawater within thousands of years. Living analogs: hyperacidic crater lakes (Poás, Kawah Ijen). At 701 mbsf in M0077A lives Desulfovermiculus, a sulfate reducer: the ancestral metabolism, still there.
• Melt model: ~1–2×10³ km³ by D³ scaling of the hydrocode; the core holds ~125 km³ in the peak-ring unit alone — fits with margin.
• Energy partition model: the 50/50 stays order-of-magnitude, declared — fine tables require a hydrocode.

Open nodes (declared)

• The first-year race open: needs a coupled model (lab). Without it, the early thermal profile stays order-of-magnitude.
• Element creation in the eye JCEA hypothesis: test designed, not run — multi-isotope systematics (Fe-Zn-Cu, already measured in M0077A) comparing eye-zone veins (<10 km radius) against distal veins, plus mineralogy. Prediction: anomalies that known fractionation + TSR cannot explain. If only known processes appear, the hypothesis falls. Needs the samples.
• Polar super-snowfalls hypothesis: ~20 cm over the Arctic if 10% of the vapor reached the poles — consistent physics but no proposed observable: the weakest node of the model. Kept for coherence, not for evidence.

Falsifiers

• F1 — Vapor chemistry: salinity and S/O isotopes in fluid inclusions of early veins (>250 °C, fresh and sulfatic — sulfur-dominated) vs late veins (marine). The test already has numbers: target +18.5‰, center −17.2/+8.5‰ — early veins must carry the fractionated central signature. If they show the same mix as the late ones, the bubble mechanism falls. Testable on the existing M0077A core.
• F2 — Radial gradient: high-temperature alteration must last longer inside the eye (~10 km) than outside. Compare cores at different radii of the peak ring.
• F3 — First-year race: needs a coupled model (lab). Without it, the early profile stays order-of-magnitude.
• F4 — Sulfur trap: expected signature: a sulfur-rich horizon sealed by the resurge breccia — sulfur that never reached the stratosphere (the impact winter was overestimated by that fraction). Already described in the core: hydrothermal sulfides at 616–618 mbsf in M0077A. Balance: veins + horizon vs modeled aerosols.

Labels: data measured or published · model reproducible first-order calculation · hypothesis proposal with a test · JCEA theory author's premise · open no model yet.

Global markers (verification)

The model's plume must reproduce them, node by node:

• Iridium: global layer 30–160× background (2.0–2.8×10¹¹ g); a 10 km carbonaceous asteroid contributes ~2.3×10¹¹ g — single impactor: the budget closes. (Alvarez et al. 1980; Artemieva & Morgan 2009)
• Spherules: deposits thicken toward the Gulf of Mexico — plume centered on Chicxulub. (Smit & Klaver)
• Shocked quartz: global PDFs demand high shock pressure; the model delivers 540→6 GPa with margin. (Bohor et al. 1984)
• Soot: global soot in the layer (Kaiho et al. 2016); fire extent remains disputed.
• Sulfur-poor impactor: Ni isotopes identify a CO chondrite (Makhatadze et al. 2026, Sci. Adv.) — the winter's sulfur came from the target rock, not the body.

Verdict: no marker demands correcting what happened. It only modifies the chronology, not the event.

Provenance

Theory by Juan Carlos Euyoque Aguilera (JCEA), started October 3, 2026 and synchronized with the author on October 5, 2026. CC BY 4.0 license.

Status: working draft — not sealed (Método Origen sealing awaits full synchronization). OTS stamp (layer 3): pending — 0 attestations on 2026-10-05 (calendars down, same as v3.9.7/v3.9.8); declared openly and retried daily by cron. The manifest is never regenerated after a sealing.

Cited data belongs to its sources: Pickersgill et al. (2026), IODP/ICDP Expedition 364, Rodiouchkina et al. (2025), and the standard Chicxulub literature. The judge is the math. If a node does not add up, it gets corrected in public.