China Geology最新文献_第10页

Passability test and simulation of sand control string with natural gas hydrates completion in large curvature hole 大曲率井含天然气水合物完井防砂管柱通过性测试与模拟

IF 4.5 3区地球科学

China Geology Pub Date : 2023-01-01 DOI: 10.31035/cg2022024

Hao-xian Shi , Yan-jiang Yu , Ru-lei Qin , Jun-yu Deng , Yi-xin Zhong , Li-qiang Qi , Bin Li , Bo Fan , Qiu-ping Lu , Jian Wang , Kui-wei Li , Ye-cheng Gan , Gen-long Chen , Hao-wen Chen , Zhi-ming Wu

{"title":"Passability test and simulation of sand control string with natural gas hydrates completion in large curvature hole","authors":"Hao-xian Shi , Yan-jiang Yu , Ru-lei Qin , Jun-yu Deng , Yi-xin Zhong , Li-qiang Qi , Bin Li , Bo Fan , Qiu-ping Lu , Jian Wang , Kui-wei Li , Ye-cheng Gan , Gen-long Chen , Hao-wen Chen , Zhi-ming Wu","doi":"10.31035/cg2022024","DOIUrl":"https://doi.org/10.31035/cg2022024","url":null,"abstract":"<div><p>To meet the requirements of marine natural gas hydrate exploitation, it is necessary to improve the penetration of completion sand control string in the large curvature borehole. In this study, large curvature test wells were selected to carry out the running test of sand control string with pre-packed screen. Meanwhile, the running simulation was performed by using the Landmark software. The results show that the sand control packer and screen can be run smoothly in the wellbore with a dogleg angle of more than 20°/30 m and keep the structure stable. Additionally, the comprehensive friction coefficient is 0.4, under which and the simulation shows that the sand control string for hydrate exploitation can be run smoothly. These findings have important guiding significance for running the completion sand control string in natural gas hydrate exploitation.</p><p>©2023 China Geology Editorial Office.</p></div>","PeriodicalId":45329,"journal":{"name":"China Geology","volume":null,"pages":null},"PeriodicalIF":4.5,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49733032","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Geology and mineralization of the Duobaoshan supergiant porphyry Cu-Au-Mo-Ag deposit (2.36 Mt) in Heilongjiang Province, China: A review 黑龙江省多宝山超巨型斑岩型铜、金、钼、银矿床(236 Mt)地质与成矿作用

IF 4.5 3区地球科学

China Geology Pub Date : 2023-01-01 DOI: 10.31035/cg2023010

Sen Zhang, Nan Ju, Guo-bin Zhang, Yuan-dong Zhao, Yun‐sheng Ren, Baoshan Liu, Hui Wang, Rong Guo, Qun Yang, Zhen-ming Sun, Feng-ming Xu, Keyou Wang, Yu-jie Hao

引用次数: 1

Zircon U-Pb age evidence of the Mesoarchean (2.9–3.2 Ga) crustal remnant in the Southern Dabie Orogen, South China 南大别造山带中太古代(2.9 ~ 3.2 Ga)地壳残余锆石U-Pb年龄证据

IF 4.5 3区地球科学

China Geology Pub Date : 2023-01-01 DOI: 10.31035/cg2022056

Da-liang Xu , Lian-hong Peng , Xin Deng , Chao-ran Liu , Le Wan , Xiao-ming Zhao

引用次数: 0

Characteristics of B, Zn and Se in stream sediments of Tanzania and their agricultural applications: Based on 1:1000000 geochemical survey 坦桑尼亚水系沉积物中B、Zn、Se的特征及其农业应用——基于1:10万地球化学测量

IF 4.5 3区地球科学

China Geology Pub Date : 2023-01-01 DOI: 10.31035/cg2022049

Kang-kang Xu , Hong-wei Sun , Wei Xie , Fu-qing He , Xiao-yang Liu , Kai Sun , Sheng-fei He , Xing-yuan Wu , Peng-hui Gong , Godfrey Machumu

{"title":"Characteristics of B, Zn and Se in stream sediments of Tanzania and their agricultural applications: Based on 1:1000000 geochemical survey","authors":"Kang-kang Xu , Hong-wei Sun , Wei Xie , Fu-qing He , Xiao-yang Liu , Kai Sun , Sheng-fei He , Xing-yuan Wu , Peng-hui Gong , Godfrey Machumu","doi":"10.31035/cg2022049","DOIUrl":"https://doi.org/10.31035/cg2022049","url":null,"abstract":"<div><p>Tanzania is located in eastern Africa with a predominantly agricultural ecomomy, the potential for developing and utilizing cultivated land are promising, but scientific guidance is required. B, Zn and Se are essential micronutrients for plants and human body with crucial biological functions, in particular, Se is significant for human health and considered as “the king of anti-cancer”. As these elements required by human or plants are mainly absorbed from soil directly or indirectly, therefore, it is important to understand the contents and distributions of them in the soil of cultivated land for guiding agricultural production. In this work, low-density geochemical survey at the scale of 1:1000000 was carried out in Tanzania, and the results show that the concentrations of B, Zn and Se in stream sediments are low and their distributions are heterogeneous. According to the distributions of geological units, the existing cultivated land resources can be divided into five regions in Tanzania. Compared with the national background values, the concentrations of B, Zn and Se are insufficient overall but enriched locally in these regions. In general, element concentrations in stream sediments and soil have a positive correlation because of their similar sources, which is essential in agriculture application. Based on the information provided by low-density geochemical data and maps, the Se-sufficient and Se-rich regions were delineated in Tanzania, where can be used to develop Se-rich industries. Finally, this paper believes that geochemical survey is a powerful tool for cultivated land evaluation, agriculture management and land development.</p><p>©2023 China Geology Editorial Office.</p></div>","PeriodicalId":45329,"journal":{"name":"China Geology","volume":null,"pages":null},"PeriodicalIF":4.5,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49733026","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Formation and evolution of the South China Sea since the Late Mesozoic: A review 晚中生代以来南海的形成与演化述评

IF 4.5 3区地球科学

China Geology Pub Date : 2023-01-01 DOI: 10.31035/cg2022021

Xue-jie Li , Zhe Wang , Yong-jian Yao , Hong-fang Gao , Song Zhu , Zi-ying Xu

{"title":"Formation and evolution of the South China Sea since the Late Mesozoic: A review","authors":"Xue-jie Li , Zhe Wang , Yong-jian Yao , Hong-fang Gao , Song Zhu , Zi-ying Xu","doi":"10.31035/cg2022021","DOIUrl":"https://doi.org/10.31035/cg2022021","url":null,"abstract":"<div><p>The existing genetic models of the South China Sea (SCS) include an extrusion model of the Indochina Peninsula, a back-arc extension model, and a subduction and dragging model of the Proto-South China Sea (PSCS). However, none of these models has been universally accepted because they do not fully match a large number of geological phenomena and facts. By examining the regional tectonics and integrating them with measured data for the SCS, in this study, a back-arc spreading-sinistral shear model is proposed. It is suggested that the SCS is a back-arc basin formed by northward subduction of the PSCS and its formation was triggered by left-lateral strike-slip motion due to the northward drift of the Philippine Sea Plate. The left-lateral strike-slip fault on the western margin caused by the Indo-Eurasian collision changed the direction of the Southwest Sub-basin’s spreading axis from nearly E–W to NE–SW, and subduction retreat caused the spreading ridge to jump southward. This study summarizes the evolution of the SCS and adjacent regions since the Late Mesozoic.</p><p>©2023 China Geology Editorial Office.</p></div>","PeriodicalId":45329,"journal":{"name":"China Geology","volume":null,"pages":null},"PeriodicalIF":4.5,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49733028","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Pacific oyster (Crassostrea gigas) shell growth duration in a year in Bohai Bay and implication for its carbon sink potential 渤海湾太平洋牡蛎(长牡蛎)年生长周期及其碳汇潜力的启示

IF 4.5 3区地球科学

China Geology Pub Date : 2023-01-01 DOI: 10.31035/cg2023054

Wen-yu Wang, Chang-fu Fan, Zhao-jun Song, Hong Wang, Fu Wang

引用次数: 0

Optimization of water-urban-agricultural-ecological land use pattern: A case study of Guanzhong Basin in the southern Loess Plateau of Shaanxi Province, China 水-城-农-生态土地利用格局优化——以陕南黄土高原关中盆地为例

3区地球科学

China Geology Pub Date : 2023-01-01 DOI: 10.31035/cg2022068

Sai Wang, Bin Wu, Hai-xue Li, Min-min Zhao, Lei Yuan, Xi Wu, Tao Ma, Fu-Cheng Li, Shuang-bao Han

{"title":"Optimization of water-urban-agricultural-ecological land use pattern: A case study of Guanzhong Basin in the southern Loess Plateau of Shaanxi Province, China","authors":"Sai Wang, Bin Wu, Hai-xue Li, Min-min Zhao, Lei Yuan, Xi Wu, Tao Ma, Fu-Cheng Li, Shuang-bao Han","doi":"10.31035/cg2022068","DOIUrl":"https://doi.org/10.31035/cg2022068","url":null,"abstract":"Extensive land use will cause many environmental problems. It is an urgent task to improve land use efficiency and optimize land use patterns. In recent years, due to the flow decrease, the Guanzhong Basin in Shaanxi Province is confronted with the problem of insufficient water resources reserve. Based on the Coupled Ground-Water and Surface-Water Flow Model (GSFLOW), this paper evaluates the response of water resources in the basin to changes in land use patterns, optimizes the land use pattern, improves the ecological and economic benefits, and the efficiency of various spatial development, providing a reference for ecological protection and high-quality development of the Yellow River Basin. The research shows that the land use pattern in the Guanzhong Basin should be further optimized. Under the condition of considering ecological and economic development, the percentage change of the optimum area of farmland, forest, grassland, water area, and urban area compared with the current land use area ratio is +2.3, +2.4, −6.1, +0.2, and +1.6, respectively. The economic and ecological value of land increases by 14.1% and 3.1%, respectively, and the number of water resources can increase by 2.5%.","PeriodicalId":45329,"journal":{"name":"China Geology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135549712","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

SHRIMP zircon U-Pb age and O isotopic analysis of the dunite from Kudi ophiolite in the West Kunlun, China 西昆仑苦地蛇绿岩中泥质锆石SHRIMP U-Pb年龄及O同位素分析

IF 4.5 3区地球科学

China Geology Pub Date : 2023-01-01 DOI: 10.31035/cg2021047

Geng-biao Qiao , Wen-ming Li , Tian-hu Li

引用次数: 1

Application of tensor CSAMT with high-power orthogonal signal sources in Jiama porphyry copper deposit, South Tibet 大功率正交信号源张量CSAMT在藏南甲麻斑岩铜矿床的应用

IF 4.5 3区地球科学

China Geology Pub Date : 2023-01-01 DOI: 10.31035/cg2021065

Peng-liang Yu , Ting Qu , Ri-zheng He , Jian-li Liu , Su-fen Wang , Xiao-long Chen

{"title":"Application of tensor CSAMT with high-power orthogonal signal sources in Jiama porphyry copper deposit, South Tibet","authors":"Peng-liang Yu , Ting Qu , Ri-zheng He , Jian-li Liu , Su-fen Wang , Xiao-long Chen","doi":"10.31035/cg2021065","DOIUrl":"https://doi.org/10.31035/cg2021065","url":null,"abstract":"<div><p>The Jiama porphyry copper deposit in Tibet is one of the proven supergiant copper deposits in the Qinghai-Tibet Plateau at present, with the reserves of geological resources equivalent to nearly 20×10<sup>6</sup> t. However, it features wavy and steep terrain, leading to extremely difficult field operation and heavy interference. This study attempts to determine the effects of the tensor controlled-source audio-magnetotellurics (CSAMT) with high-power orthogonal signal sources (also referred to as the high-power tensor CSAMT) when it is applied to the deep geophysical exploration in plateaus with complex terrain and mining areas with strong interference. The test results show that the high current provided by the high-power tensor CSAMT not only greatly improved the signal-to-noise ratio but also guaranteed that effective signals were received in the case of a long transmitter-receiver distance. Meanwhile, the tensor data better described the anisotropy of deep geologic bodies. In addition, the tests also show that when the transmitting current reaches 60 A, it is still guaranteed that strong enough signals can be received in the case of the transmitter-receiver distance of about 25 km, sounding curves show no near field effect, and effective exploration depth can reach 3 km. The 2D inversion results are roughly consistent with drilling results, indicating that the high-power tensor CSAMT can be used to achieve nearly actual characteristics of underground electrical structures. Therefore, this method has great potential for application in deep geophysical exploration in plateaus and mining areas with complex terrain and strong interference, respectively. This study not only serves as important guidance on the prospecting in the Qinghai-Tibet Plateau but also can be used as positive references for deep mineral exploration in other areas.</p><p>©2023 China Geology Editorial Office.</p></div>","PeriodicalId":45329,"journal":{"name":"China Geology","volume":null,"pages":null},"PeriodicalIF":4.5,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49733033","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

U-Pb dating of monazite in the Bainiuchang silver polymetallic deposit, in Yunnan Province, and its limitation on Mesozoic mineralization 云南白牛场银多金属矿床独居石U-Pb定年及其对中生代成矿作用的限制

IF 4.5 3区地球科学

China Geology Pub Date : 2023-01-01 DOI: 10.31035/cg2023052

Bo-de Lu, Wen-chang Li, Xue-long Liu, Guang-zhi Meng, Qi-he Long, Hong Zhang, Jun-shan Dao, Fanglan Li, Jie-hu Zhou, Mao-huang Fan, Xue Mi, Nan Shi, Zhen-liang Cao

引用次数: 0