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Sanna

Sanna Alwmark

Biträdande universitetslektor

Sanna

The scale of a martian hydrothermal system explored using combined neutron and x-ray tomography

Författare

  • Josefin Martell
  • Carl Alwmark
  • Luke Daly
  • Stephen Hall
  • Sanna Alwmark
  • Robin Woracek
  • Johan Hektor
  • Lukas Helfen
  • Alessandro Tengattini
  • Martin Lee

Summary, in English

Nakhlite meteorites are igneous rocks from Mars that were aqueously altered ~630 million years ago. Hydrothermal systems on Earth are known to provide microhabitats; knowledge of the extent and duration of these systems is crucial to establish whether they could sustain life elsewhere in the Solar System. Here, we explore the three-dimensional distribution of hydrous phases within the Miller Range 03346 nakhlite meteorite using nondestructive neutron and x-ray tomography to determine whether alteration is interconnected and pervasive. The results reveal discrete clusters of hydrous phases within and surrounding olivine grains, with limited interconnectivity between clusters. This implies that the fluid was localized and originated from the melting of local subsurface ice following an impact event. Consequently, the duration of the hydrous alteration was likely short, meaning that the martian crust sampled by the nakhlites could not have provided habitable environments that could harbor any life on Mars during the Amazonian.

Avdelning/ar

  • Berggrundsgeologi
  • LINXS - Institute of advanced Neutron and X-ray Science
  • Hållfasthetslära
  • LUNARC - Centrum för Tekniska och Vetenskapliga Beräkningar vid Lunds Universitet

Publiceringsår

2022-05-11

Språk

Engelska

Publikation/Tidskrift/Serie

Science Advances

Volym

8

Issue

19

Dokumenttyp

Artikel i tidskrift

Förlag

American Association for the Advancement of Science (AAAS)

Ämne

  • Geology
  • Geosciences, Multidisciplinary

Nyckelord

  • Neutron tomography
  • Martian meteorites
  • Impact cratering
  • planetary science
  • Planetary geology
  • Meteorite
  • x-ray imaging
  • image analysis
  • 3D Visualisation

Aktiv

Published

Projekt

  • Leave no trace: A non-destructive correlative approach providing new insights into impactites and meteorites

ISBN/ISSN/Övrigt

  • ISSN: 2375-2548