☄️☄️☄️ NWA 17839: A Unique Ureilite with Micro-Diamonds 💎 💎 💎
**Provisional Classification**: NWA 17839
**Class**: Ureilite
**Main Mass**: 237.10 grams with traces of fusion crust!!!
**Pieces**: 1
**Type Specimen Mass**: 21.9 grams
**Weathering Grade**: Moderate
**Shock Level**: Low
**Find Location**: Algeria, 2024
**Classifier**: C. Agee, University of New Mexico (UNM)
Overview
NWA 17839 is an exciting new addition to the world of meteorites! With a total mass of 2 kg and comprising numerous pieces—estimated at 50-60—this specimen exhibits a fascinating and complex structure that beckons both new studies and impassioned inquiry among meteorite enthusiasts and researchers alike.
Physical Characteristics
The meteorite presents a single stone with an irregular and weathered exterior. Cutting through it reveals a captivating interior made up of a mosaic of relatively coarse silicate grains, highlighting its interesting formation history.
Petrography
Identified by classifier C. Agee, this ureilite is composed primarily of olivine, pigeonite, kamacite, and troilite, with finely disseminated iron-metal occupying the zones between silicate grain boundaries. What truly sets NWA 17839 apart, however, are the micro-diamonds found within—products of extreme pressure and temperature conditions typical of deep planetary interiors. Graphite casts representing plucked grains can also be observed, providing further insight into its complex mineralogy. Notably, there are mixed phases of graphite, diamond, and lonsdaleite, showcasing the meteorite’s unique geological history and conditions of formation.
Geochemical Analysis
The geochemical analysis led by C. Agee reveals key details about its mineral composition:
- **Olivine**: Fa 22.7±2.4; Fe/Mn=46±9; Cr2O3=0.62±0.18 (wt%)
- **Pigeonite**: Fs 18.1±3.1; Wo 4.5±2.8; Fe/Mn=34±10
These values indicate significant insights into the meteorite's differentiation and thermal evolution throughout its cosmic journey!
Unique Features
One of the most captivating aspects of NWA 17839 is its micro-diamond content. Formed under intense conditions, these tiny gemstones provide a glimpse into the high-pressure environments found within asteroids or even larger celestial bodies, transforming graphite into diamond through geological processes yet to be fully understood. The presence of these micro-diamonds opens avenues for research into the conditions that prevailed during their formation, contributing invaluable knowledge to planetary science.
Specimen Information
A type specimen weighing 21.9 grams is currently on deposit at the University of New Mexico. The main mass is held by Matthew Stream, further ensuring this meteorite's place in both academic and collector communities.
Conclusion
NWA 17839 is an extraordinary ureilite that combines a rich history, unique physical characteristics, and incredible geological phenomena. Its content of micro-diamonds serves as a thrilling reminder of the natural wonders of our universe, making this meteorite a highly anticipated specimen that will surely excite researchers and enthusiasts alike! Don't miss the chance to study this incredible find as it gets set for official publication! 🌟✨