排序方式： 共有39条查询结果，搜索用时 15 毫秒
1.
2.
P. M. Kartashov T. A. Gornostaeva A. V. Mokhov O. A. Bogatikov 《Doklady Earth Sciences》2016,467(2):412-414
A CdSe high-pressure polymorph of the NaCl structural type of a0 = 0.549 nm and Fm–3m space group was discovered in nature for the first time. Its composition is within range of CdSe–CdSe1–х where x = 0.2 apfu. The phase was discovered as abundant nanosize inclusions in irgizite-type condensate glass separated from the sample of impact rock of the Zhamanshin crater (Central Kazakhstan). The treated mineral was presumably formed within a gas–plasma cloud at the moment of impact. 相似文献
3.
T. A. Gornostaeva A. V. Mokhov P. M. Kartashov O. A. Bogatikov 《Doklady Earth Sciences》2018,478(2):204-207
Using high-resolution analytical electron microscopy, heterogeneous fragments of cosmogenic substances, such as nickelphosphide Ni3P and the unnamed intermetallide ZnAl2, are detected for the first time for a large meteorite crater, the Zhamanshin circular structure. Due to the impossibility of simultaneous finding these phases in the same meteorite, an assumption is made on the cometary nature of the impactor of the Zhamanshin crater. 相似文献
4.
Ziminaite,Fe3+VO4, a new howardevansite-group mineral from the Bezymyannyi volcano,Kamchatka, Russia
Pekov Igor V. Siidra Oleg I. Yapaskurt Vasiliy O. Polekhovsky Yury S. Kartashov Pavel M. 《Mineralogy and Petrology》2018,112(3):371-379
Mineralogy and Petrology - The new mineral ziminaite, ideally Fe3+VO4, was found in fumarole sublimates at the Bezymyannyi volcano, Kamchatka, Russia. Ziminaite occurs as lamellar, tabular or... 相似文献
5.
6.
A. V. Mokhov P. M. Kartashov T. A. Gornostaeva O. A. Bogatikov 《Doklady Earth Sciences》2011,441(2):1692-1694
Native ytterbium first identified in a single brownish orange glass fragment collected from the deepest part (184–189 cm)
of the bore core delivered from the Mare Crisium of the Moon to the Earth by the Luna-24 Automatic Station is described. As
follows from X-ray elemental maps, the ytterbium grain is metallic. Possible mechanisms of its formation and reasons for its
elevated corrosion stability are discussed. 相似文献
7.
8.
P. M. Kartashov A. V. Mokhov T. A. Gornostaeva O. A. Bogatikov N. A. Ashikhmina 《Petrology》2010,18(2):107-125
This paper reports new findings of native molybdenum and iron from Mare Crisium. Native tin, copper, and nickel were detected
for the first time in this area of the lunar surface. Native tantalum and indium, intermetallic compound Ta2Mo, and barium titanate Ba2TiO4 were found for the first time on the Moon. The latter two phases were observed for the first time in nature. It was shown
that the investigated mineral phases correspond to different genetic groups (preimpact, impact, and postimpact mineral assemblages),
which is in general typical of lunar regolith. Based on the morphological features of the identified mineral phases, the history
of the formation of impact glass particles was reconstructed in part. They were probably affected by at least three impact
events. It was concluded that the peculiar molybdenum geochemical anomaly observed in a group of orange impact glass fragments
was not related to the impactor material but rather to the intrinsic enrichment in molybdenum of lunar rocks (target) in the
area of the impact events. It was supposed that this enrichment could be of exhalative (fumarole) nature. 相似文献
9.
10.
A. E. Zadov V. M. Gazeev O. V. Karimova N. N. Pertsev I. V. Pekov E. V. Galuskin I. O. Galuskina A. G. Gurbanov D. I. Belakovsky S. E. Borisovsky P. M. Kartashov A. G. Ivanova O. V. Yakubovich 《Geology of Ore Deposits》2011,53(8):775-782
A new mineral of the neptunite group, magnesioneptunite KNa2Li(Mg,Fe)2Ti2Si8O24, a Mg-dominant analogue of neptunite and manganoneptunite, has been found in the Upper Chegem caldera near Mount Lakargi, Kabardino-Balkaria, the North Caucasus, Russia in a xenolith of altered sandstone located between skarnified carbonate xenoliths and ignimbrite. Magnesioneptunite occurs as nearly isometric grains and aggregates up to 0.1 mm in size in the cores of some grains of a Mg-rich variety of neptunite with Mg/(Fe + Mn) = 0.7?1.0. The chemical composition of magnesioneptunite with a maximum Mg content is as follows, wt %: 3.63 K2O, 8.21 Na2O, 1.73 Li2O, 6.47 MgO, 0.04 MnO, 5.87 FeO, 0.07 Al2O3, 18.73 TiO2, 56.88 SiO2, 99.62 in total. The empirical formula is (K0.67Na0.32Ca0.01)Σ1.00Na2.06Li1.00 · (Mg1.39Fe 0.71 2+ )Σ2.10(Si7.90Al0.01)Σ7.91O24. Grains of magnesioneptunite are dark brown to red-brown, translucent, with vitreous luster. D calc = 3.15 g/cm3, and the Mohs hardness is 5–6. Cleavage parallel to the (110) is perfect. The new mineral is optically biaxial, positive, α = 1.697(2), β = 1.708 (3), γ = 1.725(3), 2V meas = 45(15)°. The mineral is associated with quartz, alkali feldspar, rutile, aegirine, and neptunite. Magnesioneptunite and the Mg-rich variety of neptunite were formed as products of ilmenite alteration. Magnesioneptunite is monoclinic, C2/c; unit-cell parameters: a = 16.327(7), b = 12.4788(4), c = 9.9666(4) Å, β = 115.6519(5)°, V = 1830.5(1) Å3, Z = 4. The type specimen is deposited at the Fersman Mineralogical Museum of the Russian Academy of Sciences, Moscow. 相似文献