Toconao 001 					Location 22°58.68’S, 68°18.01’W
Atacama, Antofagasta, Chile  
Find: 26 Mar 2019
Classification: Ordinary chondrite (LL3)


History: The meteorite was found by Mr. T. Kryachko on March 26, 2019, during a visual search for the meteorites in the Atacama desert.

Physical characteristics: The meteorite shows numerous fragments of irregular shape. It is grayish-brown in color, with fusion crust is absent,
and chondritic texture visible on the sample surface. Some of the fragments are patchy, covered by salts; 
some of them are fractured by sub-parallel fracture planes due to weathering processes.

Petrography: (Lorenz C. A.) The meteorite is composed of chondrules of RP, RO, BP, BO, POP, PO and C types. 
Average chondrule diameter is 486±290 µm (N=280). Minor components are chondrule fragments, mineral grains and essentially fine-grained, 
non-transparent matrix. The chondrules are well outlined and have sharp contacts with the matrix. Troilite-rich chondrules are widely distributed, 
silica-rich chondrule was found. The main phases are olivine, pyroxene, troilite and glass; metal is accessory. 
Several chondrules contain Al-rich clinopyroxene. Olivine has sharp optical extinction. 
A network of thin veins of weathering products crosses the meteorite.

Geochemistry: Mineral compositions and geochemistry: Olivine: Fa19.4±12.3 (N=70), PMD Fa is 63.2%, CaO 0.01-0.58 wt%; 
pyroxene Fs8.3±7.6Wo1.2±1.2 (N=30), clinopyroxene Fs15.4±6.1Wo23.4±8.2 (N=6); 
Al-rich clinopyroxene (wt%, N=22): Al2O3 13.7±4.3; TiO2 0.7±0.4; Cr2O3 0.3±0.3; sulfide is troilite; 
Total Fe of the meteorite is 19.7 wt% (XRF, T. G. Kuzmina, Vernad).

Classification: Based on a texture, PMD of Fa olivine and total Fe abundance the meteorite is classified as ordinary chondrite of LL group, petrological type 3.