... of America 2024 Mineralogical Society of America The Xiakou stratal succession (31°6′51″N, 110°48′13″E) comprises the Permian Chihsian to Lower Triassic Smithian stages. The depositional setting of the Xiakou region was a distal carbonate ramp characterized by shallow to somewhat deeper water open...

... for bentonites spanning a wide range of ages and depositional environments globally. We found that Ti mainly occurs as discrete micrometer-scale magmatic srilankite and nanoscale authigenic anatase crystals. During the weathering process, the magmatic srilankite partly dissolved under acidic conditions...

... is characteristically carbon-rich and is a horizontally interbedded clay layer in the Xiakou section, which implies that the sediments of P259-b were deposited under weak hydrodynamic conditions and in a strongly reducing environment, taking into account the larger number of illite layers in the I-S. Clay layer...

... from their different sedimentary environments; Meishan was situated closer to the volcanic eruption than Xiakou ( Wang and Xia, 2004 ). Kaolinite deposits typically occur near the shore because of the large particles; the occurrence of kaolinite at Meishan while absent from Xiakou could be attributed...

... ). The lower Daye Formation consists of interbedded thick mudstone, clay, and siliceous mudstone, deposited in a similar environment to the upper Changxing Formation. Fig. 1. Geological sketch map of Xiakou area. Pt, Proterozoic; Z, Sinian; Є, Cambrian; O, Ordovician; S, Silurian; D, Devonian; P 2...

... on which were deposited the Meishan (∼30–60 m water depth; Yin et al., 2001 ) and Xiakou sections (∼200–500 m water depth; Zhao et al., 2005 ). The Xiakou section (Hubei Province) consists of 2.7 m of black mudstone with limestone interbeds (Dalong Formation) overlain by 1.9 m of gray mudstone (Daye...

... detrital mudstones were collected only from the deep-marine Dongpan (DP) section and the shallow-marine Xiakou (XK) section, taking into account the generally rapid changes in sedimentary facies of lacustrine and paludal sections. The depositional facies and sampling locations of the samples studied...

... of volcanic activity, is considered an effective tool for 78 stratigraphic correlation due to its stable deposition and global uniform distribution 79 (Huff et al., 1996; Huff, 2016). However, the mobility characteristics of Ti can affect 80 source area identification by using Ti as immobile element. Thus...

...Yong Lei; Thomas Servais; Qinglai Feng; Weihong He Abstract Diverse and well-preserved latest Permian phytoplankton assemblages are described from four sections of the Yangtze Block, South China from localities in Zhongzhai (Guizhou Province), Shangsi (Sichuan Province), Xiakou (Hubei Province...

... exploration have discovered abundant clay and clay mineral resources in China. In addition to common kaolinite, smectite, and vermiculite, large deposits of other clay minerals, such as rectorite in Hubei Province and hydrobiotite in Xijiang Autonomous Region, have also been discovered. With advances...

... ), and the Shangsi section in northern Sichuan Province ( Li et al., 1989 ; Lai et al., 1996 ; Nicoll et al., 2002 ; Jiang et al., 2011 ). The Daxiakou section (GPS: N31°06.874′, E110°48.209′) is located 6 km east of Xiakou Town, in Xingshan County, western Hubei Province, South China ( Fig. 1 ). Here...

... deposited all over the basin ( Wang et al. 1989 ). During the Late Permian, continental and littoral swamp facies developed in the southwest of the basin, platform trench facies were appearing in the east, and in the remainder of the basin carbonate platform facies were still being deposited ( Wang et al...

... ) of samples collected from four sections through the P-Tr transition. These four sections were deposited in different sedimentary settings in South China spanning from shallow water carbonate platform to deep water, lower ramp slope environments ( Fig. 1 ). In combination with previously published carbon...

... reported from the deep-water environments. Only recently, a deep-water foraminiferal fauna extracted from siliceous deposits in the Dalong Formation was systematically described from the Dongpan section in Guangxi, southwestern South China (Shang et al., 2003 ; Gu et al., 2007...

... Capitanian time a large carbonate platform divided by the deep-water Jiangnan Basin in the middle into the Yangtze Platform in the west and the Cathaysian Platform in the east ( Fig. 1 ). The Xiakou-Lichuan Bay (Yin et al. 2014 ) was located in the northern Yangtze Platform ( Fig. 1 ). Our studied section...

... demonstrate a felsic nature for these volcanic ash beds (He et al. 1989 ; Yin et al. 1989 , 1992 ; Yang et al. 1991 ). The connection between the PTB mass extinction and the Siberian Large Igneous Province led to the conclusion that these ash beds may represent distal deposits from basaltic volcanisms...

... in Hubei Province in south-central China, an area close to the paleoequator during the late Permian to Early Triassic (Fig. DR1 in the GSA Data Repository 1 ). The study section was deposited on a carbonate ramp, at water depths of >200 m, on the northern (paleowestern) margin of the Yangtze platform...

... to dwelling and feeding behaviors of deposit-feeding crustaceans, annelids, or insects ( Häntzschel, 1975 ; Pemberton, 1992 ; Knaust, 2007 , 2013 ). Rhizocorallium is characterized by relatively complex spreite structures, indicating complicated behaviors of trace makers, and thus it has also been...

.... , Xia , W. , and Yu , N. , 2008 , Clay mineralogy across the P-T boundary of the Xiakou section, China: Evidence of clay provenance and environment : Clays and Clay Minerals , v. 56 , p. 131 – 143 , https://doi.org/10.1346/CCMN.2008.0560201 . Hower , J. , Eslinger , E.V...

.... In order to substantiate the correctness of this GSSP and its global importance, we selected a major section and two auxilliary sections for studying correlative conodont zonations at Maoershan, western Hubei, South China, which was deposited in the slope environment of a continental margin basin...