... al., 1999). The Lower Jurassic Fuxian Formation was deposited on the Upper Triassic Yanchang Formation, developing a regional angular unconformity (Yan, 1992). The Fuxian Formation is mainly a braided river deposit, but a lacustrine succession developed in the Anya area in the northeastern Ordos...

... ( Li et al., 1995b ; Liu and Yang, 2000 ). From the bottom to the top, the Early–Middle Jurassic mega-sequence consists of the Fuxian, Yan’an, Zhiluo, and Anding Formations ( Lee, 1986 ). The Lower Jurassic Fuxian Formation overlies the Triassic erosional surface (Fig. S1A) with its lower part...

.... 2021 ; Li et al. 2022 ). Pyrite is widely developed in the Ordovician Majiagou Formation in the Fuxian area of the Ordos Basin, which provides a good research basis for us. In addition, there are still gaps in previous studies on the genesis of pyrite in this area, and the connection between...

... ( Zhang, 1997 ). The Lower Jurassic Fuxian Formation was deposited in local sags formed on the pre-Jurassic erosional surface and is mainly composed of sandstones and conglomerates of incised braided-channel systems ( Wu and Xue, 1992 ) ( Figure 3B ). During the deposition of the lower section...

..., for an epidote vein, a value of 0.70526 from an initial hypothetical value of 0.70310. As can be seen, this is a relatively moderate increase in spite of the very high W/R ratios characteristic of epidote vein formation. It is unlikely that submarine-hydrothermal alteration would have been able to raise 87 Sr...

... Formation are the Jurassic Zhiluo and Fuxian Formations, respectively, but the petroleum resources in these formations are not abundant. The target area, the Pengyang area, is located in the southern Tianhuan depression (Figure  1a ). Figure 1. Geologic map of the study area and stratigraphic column...

... was initiated during the convergence between the NCC and Yangtze Blocks (Okay and Şengör 1992 ), marking the thinnest part of the eastern NCC (ENCC) lithosphere (Chen et al. 2008 ). The extension may also have aided the asthenospheric material upwelling in the COB area and the formation of a low-velocity...

... section; its top had been variably eroded. The unconformably overlying Early Jurassic Fuxian Formation is not present in the southwestern margin of basin. The early Middle Jurassic Yan’an Formation is made up of conglomerates, sandstones, and shales with thin coal interlayers. The uncomfortably overlying...

... from the Fuxian kimberlite confirm that SiC occurs naturally ( Leung et al. 1990 ; Leung 1990 ), SiC is still an enigma mineral in terms of its genesis and its 13 C-depleted isotopic composition. Natural SiC always occurs alongside with other reduced phases. SiC can have Si ( Di Pierro et al. 2003...

.... The regional Mesozoic sedimentary deposits belong mainly to the Late Triassic Yanchang Formation (T 3 y), including the petroliferous rocks of the Ordos Basin ( Table 1 ). The Jurassic strata are composed of deposits of the Middle and Lower units, whereas the Upper unit is absent. The Lower Jurassic Fuxian...

...Fig. 3. Schematic diagram of the petrogenesis of the Saima alkaline rocks from the northeastern North China Craton. The Fuxian kimberlites are used to represent the initial formation of the metasomatized lithospheric mantle in the Saima alkaline rock source area in early Ordovician time (∼500 Ma...

... ) The crystal structure of natural 33 R moissanite from Tibet . Zeitschrift fur Kristallographie , 221 , 213 – 217 . Leung , I.S. ( 1990 ) Silicon carbide cluster entrapped in a diamond from Fuxian, China . American Mineralogist , 75 , 1110 – 1119 . Leung , I. , Guo , W...

... cratons in Russia (Yakutia; Marshintsev 1990 ), China (Fuxian; Leung 1990 ), U.S.A. (Colorado; McCammon et al. 1997 ; Otter and Gurney 1986 , 1989 ), South Africa (Monastery Mine; Moore et al. 1986 ; Moore and Gurney 1989 ; Koffiefontein mine, Klein-BenDavid et al. 2007 ), Central Africa ( De et...

... and hydrothermal solution and the typomorphism of sphalerite surface: XPS, AES, and AFM data— V.L. Tauson, D.N. Babkin, S.V. Lipko, E.E. Lustenberg, I.Yu. Parkhomenko, T.M. Pastushkova, P.B. Loginov, and B.A. Loginov 94 Vol. 74, No. 7, 2010 Conditions of the formation of gold-enriched...

... magnesian, near-primitive picritic lavas in LIPs have been used to infer the characteristics of a mantle plume (e.g., Brugmann et al. 1987 ; Puchtel and Humayun 2000 ). This is possible because of the specific conditions of picrite formation, including high-temperature partial melting, consistent...

...; YA—Yanan/Fuxian area; LT—Lantian area; NCC—North China Craton. (C) Ecological environments change across the Taihang Mountains (THM). (D) Regional topography and bouguer gravity (dashed line) cross-section of NC, showing the sharp contrast between the Loess Plateau and North China Plain. The section...

... the interaction of plants with changes in heavy metal abundance across the T-OAE. We studied the Anya section (38°24′00″N, 110°11′48″E) from the Ordos Basin, North China, which consists of lacustrine strata of the Fuxian Formation ( Fig. 1 ; Supplemental Material 1 Fig. S1; Jin et al., 2020...