![(A) C1 clast containing numerous magnetite (white), pyrrhotite (light gray), and dolomite grains (dark gray). (B) C1 clast with numerous dolomites marked “D,” indicating the dolomite crystal where the FIB was cut (bottom, arrowed, and outlined in yellow). (C) Bright-field TEM image of the FIBed dolomite crystal. Numerous cracks are arrowed. (D) Na x-ray map of the same area as in (C). -- [Science Advances]](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/07/Meteor-over-New-.png?fit=1200%2C671&ssl=1)
[Science Advances] The CI (Ivuna-type) carbonaceous material returned from asteroids Ryugu and Bennu contain mobilized sodium from the evaporation or freezing of liquid water into brines, shedding light on the internal structure of ice-rich CI-type worlds and the formation of prebiotic organic compounds.
The formation of brines has not been demonstrated in CM (Mighei-type) carbonaceous chondrites, which also supplied organic matter to the early Earth.
Here, we announce the fall of a primitive meteorite from a daytime fireball over the New York metropolitan area in July 2024. It is a CM2 breccia that contains unique CM1 clasts rich in water and sodium.
The meteorite contains abundant amino acids and other products of organic chemistry in brines that reveal subsurface processes on CM-type asteroid parent bodies.
- Meteor over New York City: Brines in a primitive CM asteroid, Science Advances via PubMed (open access)
- Meteor over New York City: Brines in a primitive CM asteroid, Science Advances (open access)
Astrobiology, Astrochemistry, Astrogeology,
