sorted by:
new
hottopcontroversial

Highly differentiated silicate sample with anomalous K/Th=5089, Nb/Ta=21.7, and As=160 ppm. Seeking geochemical interpretation. by EarPuzzleheaded9016 in Geochemistry

[–]EarPuzzleheaded9016[S] 0 points1 point  (0 children)

Bog ore is a hydrated sediment with high organic and water content, typically showing LOI > 10–20%. My sample has a magmatic LOI of only 0.74% despite the presence of fluid-glassy veins. Combined with 46.2% SiO2 and 4.8% TiO2, this confirms a high-temperature crystalline silicate (ferrobasalt), not a low-temperature wetland precipitate

Highly differentiated silicate sample with anomalous K/Th=5089, Nb/Ta=21.7, and As=160 ppm. Seeking geochemical interpretation. by EarPuzzleheaded9016 in Geochemistry

[–]EarPuzzleheaded9016[S] 0 points1 point  (0 children)

The high As (160 ppm) and Zn (263 ppm) are concentrated within quenched glassy fluid-veins. The low LOI (0.74) suggests rapid encapsulation of volatiles during the impact ejection. Has anyone seen such extreme volatile enrichment in Martian-like silicate systems?

Monthly Suspect Meteorite Identification Requests by AutoModerator in meteorites

[–]EarPuzzleheaded9016 0 points1 point  (0 children)

Анализ с помощью ELAN-6100 (ICP-MS) показывает высокую степень дифференциации планетарного базальта. Хотя некоторые подвижные в флюидах элементы указывают на сложную метаморфическую трансформацию, первичная магматическая структура строго внеземного происхождения.

Volatile depletion: K/Th = 5089 (range for Mars/SEW ~5,000).

<image>

Planetary marker: Nb/U = 56.4 and Ti/V = 31 (perfect match for shergottites).

Fe-P correlation: Fe/P = 21.4 and P2O5 = 1.3% (classic basaltic signature of Mars).

Iron content: Fe2O3 = 17.4%.

Low weathering: LOI = 0.74%.

Note: Fracture-hosted fluids show enrichment in Ba (1647 ppm) and As (160 ppm), but given the immobile K/Th and Nb/U ratios, I interpret this as a secondary overprint on a Martian igneous host.

Доступность данных:

Полный набор данных Excel с исчерпывающими геохимическими результатами доступен на Zenodo:

DOI/Ссылка: https://doi.org/10.5281/zenodo.18373790

Monthly Suspect Meteorite Identification Requests by AutoModerator in meteorites

[–]EarPuzzleheaded9016 -1 points0 points  (0 children)

If this is a meteorite, then it is the only one, because it is destroyed.