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Article ; Online: Influence of thermochemical sulfate reduction on oxygen isotopic composition of calcite cements in carbonates of the Triassic Feixianguan and Permian Changxing formations in the Sichuan Basin, China

Guangwei Wang / Fang Hao / Huayao Zou / Pingping Li

Frontiers in Earth Science, Vol

2023 Volume 10

Abstract: ... isotope fractionation. In this study, the stable isotope compositions of the calcite cements in the Changxing and ...

Abstract	Calcite cement is a common diagenetic mineral in carbonate rocks and plays an important role on rock quality as hydrocarbon reservoirs. Traditionally, oxygen isotopic compositions (δ18O) of the diagenetic calcites tend to decrease with increasing depths due to temperature-dependent isotope fractionation. In this study, the stable isotope compositions of the calcite cements in the Changxing and Feixianguan formations from the Puguang, Yuanba, Jiannan and Fuling carbonate fields in the Sichuan Basin were analyzed. The results show that some calcite cements have δ18O values similar to those of their host carbonates, despite the fact that these calcites formed at elevated temperatures (>∼100°C). Based on petrographic and geochemical analyses, the 18O-enriched calcites commonly occur with solid bitumens and have lower δ13C values compared with host rocks, suggesting thermochemical sulfate reduction (TSR) provided organic carbon for these calcite precipitation. During TSR, thermal oxidation of hydrocarbons generated the light carbon, and simultaneously the reduced sulfate ions provided the oxygen. Comparison of our study with the TSR calcites worldwide, a model for oxygen isotope behavior during TSR was established. Oxygen isotope compositions of TSR-related calcites are a function of isotope compositions and amounts of the initial anhydrite and pore waters. TSR shows two opposing effects on the δ18O values of calcites, depending on the δ18O ratios of the initial anhydrite. The reduction of anhydrite with relatively low δ18O values causes the calcite δ18O lower than theoretical values of calcites directly precipitated from pore waters. The heavy δ18O ratios of calcites formed during TSR are not only attributed to the 18O-enriched pore water resulting from extensive water-rock interaction, but also probably due to the involvement of anhydrite with high δ18O values.
Keywords	calcite cement ; diagenesis ; oxygen-isotopic composition ; thermochemical sulfate reduction ; Sichuan Basin ; Science ; Q
Subject code	550
Language	English
Publishing date	2023-01-01T00:00:00Z
Publisher	Frontiers Media S.A.
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Positive matrix factorization as source apportionment of soil lead and cadmium around a battery plant (Changxing County, China).

Xue, Jian-long / Zhi, Yu-you / Yang, Li-ping / Shi, Jia-chun / Zeng, Ling-zao / Wu, Lao-sheng

Environmental science and pollution research international

2014 Volume 21, Issue 12, Page(s) 7698–7707

Abstract: ... contaminated site in Changxing County, Zhejiang Province, China. The site is heavily contaminated with high ...

Abstract	Chemical compositions of soil samples are multivariate in nature and provide datasets suitable for the application of multivariate factor analytical techniques. One of the analytical techniques, the positive matrix factorization (PMF), uses a weighted least square by fitting the data matrix to determine the weights of the sources based on the error estimates of each data point. In this research, PMF was employed to apportion the sources of heavy metals in 104 soil samples taken within a 1-km radius of a lead battery plant contaminated site in Changxing County, Zhejiang Province, China. The site is heavily contaminated with high concentrations of lead (Pb) and cadmium (Cd). PMF successfully partitioned the variances into sources related to soil background, agronomic practices, and the lead battery plants combined with a geostatistical approach. It was estimated that the lead battery plants and the agronomic practices contributed 55.37 and 29.28%, respectively, for soil Pb of the total source. Soil Cd mainly came from the lead battery plants (65.92%), followed by the agronomic practices (21.65%), and soil parent materials (12.43%). This research indicates that PMF combined with geostatistics is a useful tool for source identification and apportionment.
MeSH term(s)	Cadmium/analysis ; China ; Electric Power Supplies ; Environmental Monitoring/methods ; Industry ; Lead/analysis ; Metals, Heavy/analysis ; Models, Statistical ; Soil Pollutants/analysis
Chemical Substances	Metals, Heavy ; Soil Pollutants ; Cadmium (00BH33GNGH) ; Lead (2P299V784P)
Language	English
Publishing date	2014-03-14
Publishing country	Germany
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ZDB-ID	1178791-0
ISSN	1614-7499 ; 0944-1344
ISSN (online)	1614-7499
ISSN	0944-1344
DOI	10.1007/s11356-014-2726-x
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Article ; Online: Characteristics of the Changxing Fm biohermal gas reservoir in the Yuanba Gasfield, Sichuan Basin and development countermeasures

Wu, Hengzhi / Li, Zhongping / Ke, Guangming

Sichuan Petroleum Administration Natural Gas Industry B. 2017,

2017

Abstract: ... among those discovered in the world. Its biohermal gas reservoir of the Upper Permian Changxing Fm is characterized ...

Abstract	Located in the Sichuan Basin, the Yuanba Gasfield is the deepest high-sulfur carbonate gas field among those discovered in the world. Its biohermal gas reservoir of the Upper Permian Changxing Fm is characterized by ultra depth, multi-stage small and scattered reef, thin reservoir, poor physical properties, strong heterogeneity, complex fluid distribution, and low production of vertical wells. The development of the biohermal gas reservoir is subject to many difficulties. For example, it is necessary to deepen the studies on time-space distribution laws of reef dolomite reservoirs; it is difficult to characterize small reefs precisely and predict thin reservoirs quantitatively; the deployment and optimization design of horizontal wells are influenced by multiple factors; and the difficulty for horizontal wells with long horizontal sections to run through high-quality thin reservoirs is high. In order to develop the Yuanba Gasfield efficiently, therefore, it is necessary to carry out a series of technical researches on the distribution laws and development models of biohermal reservoirs, precise characterization of small reefs, quantitative prediction of thin reservoirs, optimization design of horizontal wells in banded small reef gas reservoirs, and real-time trajectory optimization and adjustment of horizontal wells in ultra-deep thin reservoirs. These research results provide a powerful support for the development and construction of the Yuanba Gasfield. Based on these technologies, China's first ultra-deep high-sulfur large biohermal gas field was built with a mixed gas annual production capacity of 40×108 m3. The successful commissioning of the Yuanba Gasfield lays a basis for the leading position of China in the field of high-sulfur gas field development. In addition, it is of great significance to the long-term stable gas supply in 70 cities of six provinces and two municipalities along the "Sichuan-to-East China Gas Transmission Pipeline", as well as to the industrial structure adjustment in central-western China and the economic development along the Yangtze River.
Keywords	Sichuan Basin ; Yuanba Gasfield ; Late Permian ; Biohermal gas reservoir ; Reservoir ; Development model ; Reef characterization ; Horizontal well design ; Trajectory optimization
Language	English
Publishing place	Elsevier B.V.
Document type	Article ; Online
Note	Pre-press version
ZDB-ID	2835766-8
ISSN	2352-8540
ISSN	2352-8540
DOI	10.1016/j.ngib.2017.05.003
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Article ; Online: County-scale temporal-spatial distribution and variability tendency of heavy metals in arable soils influenced by policy adjustment during the last decade: a case study of Changxing, China.

Li, Peng / Zhi, Yuyou / Shi, Jiachun / Zeng, Lingzao / Wu, Laosheng

Environmental science and pollution research international

2015 Volume 22, Issue 22, Page(s) 17937–17947

Abstract: ... the notorious pollution. An extensive survey was conducted in Changxing County, Zhejiang Province ...

Abstract	The widespread "pertinacious illness" for environmental management soil contamination by toxic metals has inevitably led to announcement of gradual adjustment for the local government to curb the notorious pollution. An extensive survey was conducted in Changxing County, Zhejiang Province, to investigate the contents of cadmium (Cd), arsenic (As), lead (Pb), and copper (Cu) and characterize the spatial-temporal change pattern to elucidate the current state and performance of policy adjustment. Geostatistic methods were applied in the mapping and characterizing processes to assess the concentrations of heavy metals at unsampled sites. Enrichment factor analysis indicated obvious Cd and As enrichment in the west and northwest of the county. Ordinary kriging interpolation combined with semivariogram revealed that the four heavy metals possessed distinct spatial distribution patterns. However, the distribution patterns for the elevated Cd and Pb concentrations exhibited a similar geographic drift, corresponding primarily to industrial distribution. Compared with the investigation findings in 2003, the results indicated an uptrend of Cd and As and downtrend of Cu, while Pb was a mixture of increase and decrease. However, strengthened actions aimed at restraining heavy metal contamination are still needed to establish a mechanism to secure residents' health and livelihood.
MeSH term(s)	China ; Environmental Monitoring/legislation & jurisprudence ; Environmental Policy ; Industry ; Metals, Heavy/analysis ; Soil/chemistry ; Soil Pollutants/analysis ; Spatio-Temporal Analysis
Chemical Substances	Metals, Heavy ; Soil ; Soil Pollutants
Language	English
Publishing date	2015-11
Publishing country	Germany
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ZDB-ID	1178791-0
ISSN	1614-7499 ; 0944-1344
ISSN (online)	1614-7499
ISSN	0944-1344
DOI	10.1007/s11356-015-4964-y
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Article: Positive matrix factorization as source apportionment of soil lead and cadmium around a battery plant (Changxing County, China)

Xue, Jian-long / Zhi, Yu-you / Yang, Li-ping / Shi, Jia-chun / Zeng, Ling-zao / Wu, Lao-sheng

Environmental science and pollution research. 2014 June, v. 21, no. 12

2014

Abstract: ... contaminated site in Changxing County, Zhejiang Province, China. The site is heavily contaminated with high ...

Abstract	Chemical compositions of soil samples are multivariate in nature and provide datasets suitable for the application of multivariate factor analytical techniques. One of the analytical techniques, the positive matrix factorization (PMF), uses a weighted least square by fitting the data matrix to determine the weights of the sources based on the error estimates of each data point. In this research, PMF was employed to apportion the sources of heavy metals in 104 soil samples taken within a 1-km radius of a lead battery plant contaminated site in Changxing County, Zhejiang Province, China. The site is heavily contaminated with high concentrations of lead (Pb) and cadmium (Cd). PMF successfully partitioned the variances into sources related to soil background, agronomic practices, and the lead battery plants combined with a geostatistical approach. It was estimated that the lead battery plants and the agronomic practices contributed 55.37 and 29.28� %, respectively, for soil Pb of the total source. Soil Cd mainly came from the lead battery plants (65.92� %), followed by the agronomic practices (21.65� %), and soil parent materials (12.43� %). This research indicates that PMF combined with geostatistics is a useful tool for source identification and apportionment.
Keywords	analytical methods ; batteries ; cadmium ; chemical composition ; heavy metals ; lead ; plant cultural practices ; soil ; soil parent materials ; soil sampling ; China
Language	English
Dates of publication	2014-06
Size	p. 7698-7707.
Publishing place	Springer-Verlag
Document type	Article
ZDB-ID	1178791-0
ISSN	1614-7499 ; 0944-1344
ISSN (online)	1614-7499
ISSN	0944-1344
DOI	10.1007/s11356-014-2726-x
Database	NAL-Catalogue (AGRICOLA)

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Article: Comparative study of gas accumulations in the Permian Changxing reefs and Triassic Feixianguan oolitic reservoirs between Longgang and Luojiazhai-Puguang in the Sichuan Basin

Zhao, WenZhi / Xu, ChunChun / Wang, TongShan / Wang, HongJun / Wang, ZeCheng / Bian, CongSheng / Li, Xia

Chinese science bulletin Kexue tongbao.. 2011 Nov., v. 56, no. 31

2011

Abstract: Reef and oolitic gas reservoirs in the Permian Changxing and Triassic Feixianguan formations have ...

Abstract	Reef and oolitic gas reservoirs in the Permian Changxing and Triassic Feixianguan formations have been discovered in both the Luojiazhai-Puguang and Longgang areas of the Sichuan Basin, but the accumulation scale, abundance and distribution patterns differ greatly. In fact, the two areas have more differences than they have similarities. Similarities include: (1) the lithology, properties and types of porosity of the reef and oolitic reservoirs are primarily consistent in the two areas; (2) well-developed regional caprocks that seal the fluid system; and (3) accumulation process histories, with liquid hydrocarbon charging at an early stage, cracking into gas at a high to over-mature stage, adjustment of gas reservoirs at an uplifting stage, and final reservoir generation at a late stage. Differences include: (1) gas accumulations in the Luojiazhai-Puguang area that are dominated by oil-type cracked gas, with multiple and sufficient gas sources, contrasting with gas accumulations in the Longgang area that are dominated by coal-sourced gas with insufficient gas sources; (2) heterogeneity and horizontal diversity of reservoirs in the Longgang area that are stronger than in the Luojiazhai-Puguang area; and (3) the development of deep and large faults in the Luojiazhai-Puguang area that link source, reservoir and migration pathways, contrasting with poorly developed faults in Longgang area, where laterally variable fractures are the major migration pathway. Because of these differences, abundant large-scale structurally-controlled gas accumulations are developed in the Luojiazhai-Puguang area, whereas lithology plays a more important role in gas accumulation in the Longgang area where accumulations are smaller-scale and have lower gas-bearing abundance. We suggest that future exploration for reef and oolitic gas accumulations should be strengthened in NE Sichuan and NW Sichuan Jiulongshan. In particular, the transitional zone between Longgang and Kaijiang-Liangping Bay has the best potential for new discoveries.
Keywords	geology ; natural gas ; porosity ; China
Language	English
Dates of publication	2011-11
Size	p. 3310-3320.
Publishing place	Springer-Verlag
Document type	Article
ZDB-ID	1021576-1
ISSN	1861-9541 ; 1001-6538 ; 0250-7862
ISSN (online)	1861-9541
ISSN	1001-6538 ; 0250-7862
DOI	10.1007/s11434-011-4668-8
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Article ; Online: Research progress on the role of endometrial glucose transporters in embryo implantation

ZHANG Lixue, LI Changxing

Jichu yixue yu linchuang, Vol 43, Iss 6, Pp 1003-

2023 Volume 1007

Abstract: Glucose transporters are important carriers that mediate glucose transport across cell membranes, including facilitated diffusion glucose transporters (GLUTs), sodium glucose co transporters (SGLTs), and a class of glucose transporters SWEETs that have ... ...

Abstract	Glucose transporters are important carriers that mediate glucose transport across cell membranes, including facilitated diffusion glucose transporters (GLUTs), sodium glucose co transporters (SGLTs), and a class of glucose transporters SWEETs that have not been extensively studied. Glucose uptake and utilization of endometrial epithelial cells during implantation can ensure normal implant-related functional activities. The purpose of this paper is to elucidate the role of glucose transporter in embryo implantation in order to further reveal the mechanism of embryo implantation and provide new ideas for the diagnosis and treatment of female infertility and early abortion caused by implantation failure.
Keywords	endometrium\|glucose transporter\|embryo implantation ; Medicine ; R
Language	Chinese
Publishing date	2023-06-01T00:00:00Z
Publisher	Institute of Basic Medical Sciences and Peking Union Medical College Hospital, Chinese Academy of Medical Sciences / Peking Union Medical College.
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Our experience in the treatment of uretero-colonic fistula.

Jiang, Changyi / Yin, Li / Wang, Yabo / Ke, Changxing

Asian journal of surgery

2023 Volume 46, Issue 10, Page(s) 4709–4711

MeSH term(s)	Humans ; Ureter ; Intestinal Fistula/etiology ; Intestinal Fistula/surgery ; Colonic Diseases/etiology ; Colonic Diseases/surgery
Language	English
Publishing date	2023-06-07
Publishing country	Netherlands
Document type	Letter
ZDB-ID	1068461-x
ISSN	0219-3108 ; 1015-9584
ISSN (online)	0219-3108
ISSN	1015-9584
DOI	10.1016/j.asjsur.2023.05.108
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Article ; Online: Giant androgen-producing adrenocortical carcinoma causing male characteristics.

Jiang, Changyi / Yin, Li / Pu, Qingsong / Ke, Changxing

Asian journal of surgery

2023 Volume 47, Issue 1, Page(s) 718–720

MeSH term(s)	Male ; Humans ; Adrenocortical Carcinoma/diagnostic imaging ; Adrenocortical Carcinoma/surgery ; Adrenocortical Carcinoma/pathology ; Androgens ; Adrenal Cortex Neoplasms/diagnostic imaging ; Adrenal Cortex Neoplasms/surgery ; Adrenal Cortex Neoplasms/pathology
Chemical Substances	Androgens
Language	English
Publishing date	2023-10-28
Publishing country	Netherlands
Document type	Letter
ZDB-ID	1068461-x
ISSN	0219-3108 ; 1015-9584
ISSN (online)	0219-3108
ISSN	1015-9584
DOI	10.1016/j.asjsur.2023.10.005
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Article: A novel heterozygous frameshift mutation in the

Liang, Jiali / Li, Ronghua / Liu, Chenmei / Cai, Yan / Liu, Yifei / Chen, Pingjiao / Zeng, Kang / Li, Changxing

Heliyon

2024 Volume 10, Issue 5, Page(s) e27195

Abstract: Pachyonychia congenita is an uncommon autosomal dominant skin disorder characterized by hypertrophic nail dystrophy, palmoplantar keratoderma, oral leukokeratosis, and cutaneous cysts. And fissured tongue is rarely reported in patients with pachyonychia ... ...

Abstract	Pachyonychia congenita is an uncommon autosomal dominant skin disorder characterized by hypertrophic nail dystrophy, palmoplantar keratoderma, oral leukokeratosis, and cutaneous cysts. And fissured tongue is rarely reported in patients with pachyonychia congenita. The disease is primarily associated with mutations in five keratin genes, namely
Language	English
Publishing date	2024-03-01
Publishing country	England
Document type	Case Reports
ZDB-ID	2835763-2
ISSN	2405-8440
ISSN	2405-8440
DOI	10.1016/j.heliyon.2024.e27195
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