Aubrites are achondritic meteorites (enstatite pyroxenites) that were formed in highly reduced magmatic environments on a differentiated parent body sharing a common oxygen isotope reservoir with enstatite chondrites (EC), Earth and Moon, and could be considered as a geochemical model of the early proto-Earth. Some pyroxenes of the Pesyanoe aubrite have high abundance of gaseous inclusions, captured during the crystallization of the rocks. Investigation of the inclusions by IR spectroscopy reveals presence of OH⁻ groups and C–H bonds. The former are assigned to protonated point defects in enstatite lattice and the latter to compounds occupying void walls. Molecular water and CO₂ were not observed. Volatile components released from the samples of the Pesyanoe enstatite by stepwise crushing and heating are composed of CO₂, H₂O and a non-condensable phase. Hydrogen isotopic composition of volatiles extracted in form of molecular water in Px-separates varies in the range δD = −61 – −84‰ with mean value of δD = −73 ± 16‰ VSMOW and is within the ranges of ECs and Earth’s mantle. The total abundance of H₂ in the pyroxene of Pesyanoe were estimated as at least 0.047 ppm that is too low in comparison with that of enstatite chondrites (≥30 ppm H₂) and could indicate nearly complete degassing of the Pesyanoe primitive precursor material during the Pesyanoe parent body accretion or a mantle degassing in igneous differentiation process. In a last case a primitive precursor could have D/H ratio different from that of enstatite chondrites.

赤铁矿是软骨质陨石（顽辉辉石辉石），是在高度还原的岩浆环境中形成的，在一个分化的母体上，与母体共享一个常见的氧同位素储集层，与顽辉石球粒陨石（EC），地球和月球一起被认为是早期原型的地球化学模型。 -地球。Pesyanoe aubrite的一些辉石具有高含量的气态夹杂物，这些夹杂物是在岩石结晶过程中捕获的。通过IR光谱的夹杂物的调查显示OH的存在^-基团和C-H键。前者被归为顽辉石晶格中的质子点缺陷，后者被归为占据空隙壁的化合物。分子水和CO ₂没有观察到。通过逐步破碎和加热从Pesyanoe顽辉石样品中释放的挥发性成分由CO ₂，H ₂ O和不可凝相组成。Px分离物中以分子水形式提取的挥发物的氢同位素组成在δD= -61 – -84‰范围内变化，平均值δD= -73±16‰VSMOW，且在ECs和地幔范围内。Pesyanoe的辉石中H ₂的总丰度估计至少为0.047 ppm，与顽辉陨石（≥30 ppm H _2）相比太低了），这可能表明在Pesyanoe母体增生过程中Pesyanoe原始前体物质几乎完全脱气，或者在火成岩分化过程中发生了地幔脱气。在最后一种情况下，原始的前驱体的D / H比可能不同于顽辉长方晶石的D / H比。