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40.19g Olivine Diogenite I Beautiful HED Achondrite Meteorite from Asteroid 4 Vesta
Top Meteorite
- $ 800.00
On Offer: 40.19g Diogenite olivine-bearing HED achondrite meteorite slice
Official name: *Northeast Africa 070 (NEA 070)
Type: HED Diogenite-olivine
Parent Body: Likely Vesta or Vestoid
Description: 40.19 gram slice of an amazing olivine-bearing diogenite HED meteorite. Polished on one side.
The HED Meteorite Clan: petrological evidence and data from NASA's Dawn mission indicate that nearly monomineralic ultramafic orthopyroxenite, olivine-bearing, and the much more rare harzburgitic, and dunite diogenites formed alongside each other. They likely originated as cumulates within localized magma chambers (plutons) situated across Vesta's lower crust and the lower-crust/upper-mantle transition zone. While the eucrites represent more evolved plagioclase rich mafic upper to middle zone crustal material. The howardites were formed by impact mixing of the diogenitic and eucritic material both in situ and during ejection events.
The HED Meteorite Clan: petrological evidence and data from NASA's Dawn mission indicate that nearly monomineralic ultramafic orthopyroxenite, olivine-bearing, and the much more rare harzburgitic, and dunite diogenites formed alongside each other. They likely originated as cumulates within localized magma chambers (plutons) situated across Vesta's lower crust and the lower-crust/upper-mantle transition zone. While the eucrites represent more evolved plagioclase rich mafic upper to middle zone crustal material. The howardites were formed by impact mixing of the diogenitic and eucritic material both in situ and during ejection events.
The HED meteorites are so named for the three types of meteorites that comprise the group; Howardite, Eucrite and Diogenite. The Eucrite and Diogenite are meteorites with distinct chemistries, while the Howardite is a mix of the eucritic and diogenitic material. The HEDs are differentiated achondritic meteorites, thought to originate from the large differentiated asteroid 4 Vesta. Vesta is one of the only asteroids visible with the naked eye and low powered telescopes.
The Vesta parent body origin for the HED clan of meteorites is considered to have been conclusively established for many years. However, the late Dr. John Wasson, a planetary science researcher from UCLA had long held that the HED meteorite clan originated from another unknown Vesta-like asteroid that was blown apart long ago. This is because we also find a class of iron meteorites with nearly identical oxygen isotopes as the HED clan. This along with other research lead Dr. Wasson to conclude the HED clan of meteorites come from another differentiated V-type asteroid that was in a cataclysmic collision liberating part or all of its metal core along with the HED meteorites.
However, this hypothesis does not necessarily rule out the possibility that a "reaccreted" Vesta and the smaller V-type asteroids collectively known as Vestoids along with the HED meteorites and the isotopically paired irons were all once part of a much larger dwarf planet prior to a massive collision with another large body. While most researchers consider the case mostly closed on this debate, the paradox of isotopically paired core metal raised by Dr. Wasson's hypothesis has not been resolved. This leaves some to speculate that perhaps we still have more to learn about this fascinating clan of achondrite meteorites and even Vesta itself.
What you get: 40.19 gram diogenite meteorite specimen as shown, & signed Certificate of Authenticity.
I offer a 100% no questions asked 30 day return policy.
SEE OFFICIAL METEORITICAL BULLETIN DATABASE ENTRY BELLOW
| Northeast Africa 070 | |||||||||||||||||||||||||||
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| Basic information |
Name: Northeast Africa 070 This is an OFFICIAL meteorite name. Abbreviation: NEA 070 Observed fall: No Year found: 2023 Country: Libya Mass:  1600 g |
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| Classification history: |
This is 1 of 32 approved meteorites classified as Diogenite-olivine. [show all] Search for other: Achondrites, Diogenites, and HED achondrites |
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| Comments: | Approved 13 Dec 2024 | ||||||||||||||||||||||||||
| Writeup |
Writeup from MB 113:
Northeast Africa 070 (NEA 070) Libya Purchased: 2023 Oct Classification: HED achondrite (Diogenite, olivine) History: Purchased by Isaac Schroeder in October, 2023 from a meteorite hunter in Libya. Physical characteristics: A single 1600 gram dark colored stone displaying remnant fusion crust with green and yellow crystals visible through some areas of the exterior. Petrography: (D. Dickens, LMAC ) An igneous rock with phaneritic texture composed mainly of low-Ca pyroxene and olivine. Examination of polished probe mount shows a coarse grained poikilitic microstructure of low-Ca pyroxene enclosing less abundant rounded olivine grains of approximately 50 µm to 250 µm with rare accessory plagioclase. Several areas of the sample display interstitial and transecting veinlets of kamacite. Minor phases include bytownite, chromite, and kamacite. Geochemistry: (D. Dickens, LMAC and A. S. Bell, UColo) Low-Ca Pyroxene Fs22.7±0.3Wo2.9±0.6, FeO/MnO = 29±1 (n=19). Olivine Fa27.8±0.3, FeO/MnO = 46.1±2 (n=15). Plagioclase An85.6±1.4Ab13.3±1.4Or1.5±0.3 (n=6). Chromite TiO2 0.9±0.1, Al2O3 5.7±0.2, MgO 5.8±0.3 (all wt%), Cr#=83, Mg#=32 (n=3). Classification: Achondrite (diogenite-olivine) Specimens: Type specimen of 21 g at TCU. Mian mass with Issac Schroeder. |
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| Data from: MB113 Table 0 Line 0: |
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