Access Denied
IMPORTANT! If you’re a store owner, please make sure you have Customer accounts enabled in your Store Admin, as you have customer based locks set up with EasyLockdown app. Enable Customer Accounts
4.83g GYARUB ZANGBO Ungrouped Pallasite Meteorite Slice from Tibet
Top Meteorite
- $ 96.00
On Offer: 4.83 gram Gyarub Zangbo ungrouped pallasite meteorite slice from the Qiangtang "No Man's Land" area of the Tibetan Plateau.
Dimensions: 28.08 mm x 22.67 mm x 2.11 mm
Official name: Gyarub Zangbo
Type: Pallasite, ungrouped
Country: Tibet, Autonomous Region of China
Year found: Oct, 2020
History: In October 2020, an exploration trip exploration by Mr. G. Tulga on the Qinghai-Tibet Plateau in the Qiangtang uninhabited area NE of Gyarub Zangbo resulted in the discovery of many disaggregated fragments composed of olivine+metal at 33.126°N, 87.079°E, as well as a much larger single metal-rich specimen nearby at 33.127°N, 87.080°E.
Description: 4.83g Gyarub Zangbo ungrouped pallasite meteorite complete slice. The Gyarub Zangbo is a rare ungrouped pallasite that does not fit in the pallasite main group (PMG). More thorough analysis of this rare pallasite from Tibet shows phases other than just olivine, including both low and high calcium pyroxenes, two types of chromite, troilite, schreibersite, and the phosphates stanfieldite and farringtonite. Also of note is that the metal in this ungrouped pallasite is more closely related to the IIF iron meteorite group. Stable oxygen isotope analysis plots this ungrouped pallasite outside of both the PMG and ES pallasite parent bodies. * See orange X in lower left corner of the plot below to see where the oxygen isotopes in this ungrouped pallasite plot compared to other pallasites.
Stable Oxygen Isotope Plot:
What you get: 4.83g Gyarub Zangbo meteorite slice as shown, membrane storage/shipping box, and signed Certificate of Authenticity.We offer a 100% no questions asked 30 day return policy.
SEE OFFICIAL METEORITICAL SOCIETY ENTRY BELOW
Gyarub Zangbo
Status: Official
| Basic information |
Name: Gyarub Zangbo This is an OFFICIAL meteorite name. |
|---|---|
|
Classification history: |
Meteoritical Bulletin, MB 110 (2022): Pallasite |
| Comments: | Approved 13 Mar 2021 Revised 7 Apr 2026: Reclassified in MB114 |
| Writeup | Writeup from MB 110: Gyarub Zangbo 33.126°N, 87.079°E Xizang, China Find: 2020 Oct Classification: Pallasite History: In October 2020 exploration by Mr. G. Tulga on the Qinghai-Tibet Plateau in the Qiangtang uninhabited area NE of Gyarub Zangbo resulted in the discovery of many disaggregated fragments composed of olivine+metal at 33.126°N, 87.079°E, as well as a much larger single metal-rich specimen nearby at 33.127°N, 87.080°E. All of this material was purchased by Ziyao Wang in October and November, 2020. Physical characteristics: The material is composed of dark brown olivine and metal in variable proportions from specimen to specimen. Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Coarse grained aggregate (mean grainsize ~5 mm) with simple mineralogy of olivine and metal (both kamacite and taenite). Geochemistry: Olivine (Fa21.6-22.8, FeO/MnO = 61-72, N = 4). Classification: Pallasite. Specimens: 120 g including two polished endcuts at UWB; remainder with WangZ. Writeup from MB 114: Gyarub Zangbo, reclassification Gyarub Zangbo was announced in Met. Bull. 110 simply as a pallasite, without assignment to a pallasite group. In addition to the kamacite, taenite and olivine reported in the original description, J. Boesenberg (BrownU) and T. Gao (PMO) subsequently identified other minor phases including troilite, schreibersite, chromite, phosphates (stanfieldite and farringtonite), as well as pyroxenes. Additional mineral analyses (T. Gao and Y. Jiang, PMO; J. Boesenberg, BrownU) include olivine (Fa21.6±0.4, Fe/Mn = 66.9±3.9, n=41), orthopyroxene (Fs19.1±2.3Wo2.0±0.8, N=21), augite (Fs8.2±0.4Wo43.0±1.6, N=6) and two kinds of chromite (Mg# = 21.5±0.6, 8.0±3.2; Cr# = 87.8±0.6). Trace element compositions of the metal were published by Jiang et al. (2023) and Bosenberg et al. (2023). Oxygen isotopes measured by H. Bao (NJU) are δ17O = -1.294±0.006, -1.3210±0.0036; δ18O = 1.824±0.005, 1.7293±0.0046; Δ17O = -2.262±0.004, -2.2385±0.0060 (all in ‰). Oxygen isotopes measured by D. Ibarra [Ed: and R. Havel] (BrownU) are δ17O =-1.408; δ18O = 1.563; Δ17O = -2.230 (all in ‰). The updated total mass is now >200 kg. These data taken together indicate that Gyarub Zangbo (GZ) is an ungrouped pallasite. Explanation (J. Boesenberg, BrownU, W. Hsu, PMO): Olivine (with Mg# of 21-22) in GZ is similar in composition to that in the Eagle Station (ES) pallasites, but with lower Fe/Mn ratios (55-65 in GZ vs 95-100 in ES), and is significantly distinct from PMG olivine compositions (Fa12). The presence of pyroxene in GZ contrasts with its complete absence in either ES or Main Group (PMG) pallasites. Oxygen isotopes for GZ plot along an array between values for the PMG and ES pallasites, but do not appear to overlap with values for any other ungrouped pallasites. Metal in GZ differs from that in IIIAB irons and instead shows affinity with IIF irons. Finally, the Ni content in GZ metal is higher than in metal in the IVB irons, ES, and PMG pallasites, and the Ga-Ge contents separate GZ from the PMG or ES groups. |
| Bibliography: |
|
| Data from: MB110 Table 0 Line 0: |
State/Prov/County: Xizang Place of purchase: China Date: 2020 Oct Latitude: 33.126°N Longitude: 87.079°E Mass (g): 17614 Pieces: 102 Class: Pallasite Shock stage: low Weathering grade: low Fayalite (mol%): 21.6-22.8 Classifier: A. Irving, UWS, and P. Carpenter, WUSL Type spec mass (g): 120.0 Type spec location: UWB Main mass: WangZ Finder: G. Tulga Comments: Work names WZY-01, WZY-10; submitted by A. Irving |
We Also Recommend
Invalid password
Enter