Pub Date : 2022-01-01DOI: 10.4236/ojg.2022.1211042
Trevor H Rempert, Brennan P. Martens, Alexander P. M. Vinkeles Melchers
{"title":"First Record of a Tylosaurine Mosasaur from the Latest Cretaceous Phosphates of Morocco","authors":"Trevor H Rempert, Brennan P. Martens, Alexander P. M. Vinkeles Melchers","doi":"10.4236/ojg.2022.1211042","DOIUrl":"https://doi.org/10.4236/ojg.2022.1211042","url":null,"abstract":"","PeriodicalId":63246,"journal":{"name":"地质学期刊(英文)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70650768","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Mohammad Ehsan Ahmadi, Sh. Mesroghli, Bahare Hedayat, H. Nazerian, A. Shirazi, Adel Shirazy
{"title":"Assessment of the Influence of Sulfuric Acid/Hydrogen Peroxide Mixture on Organic Sulfur Reduction of High Sulfur Coals and Their Chemical Composition","authors":"Mohammad Ehsan Ahmadi, Sh. Mesroghli, Bahare Hedayat, H. Nazerian, A. Shirazi, Adel Shirazy","doi":"10.4236/ojg.2022.123011","DOIUrl":"https://doi.org/10.4236/ojg.2022.123011","url":null,"abstract":"","PeriodicalId":63246,"journal":{"name":"地质学期刊(英文)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70650780","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Maoru Fu, Binyang Sun, Liquan Guo, Zan Ye, Xiangxiang Zhuang
Different geological conditions are often encountered in the excavation of coal mine roadways, with fault-fracture zone being the most commonly seen complex geological conditions. Fault-fracture zone is characterized by complex lithologic property and joint development and can easily cause safety accidents when excavation burrows through the fault. Therefore, grouting reinforcement of fault-fracture zone is often implemented to ensure coal mine safety production. Based on the tunnel excavation case of −530 −650 m belt conveyor inclined roadway at Huainan Pan’er Coal Mine, borehole optical fiber and electrical testing technologies were applied to monitor and analyze the dynamics of the surrounding rock stability when roadway excavation passed through the F1 fault, and evaluate the effect of grouting reinforcement on fault-fracture zone. According to the results of optical fiber and electrical methods, the distributional characteristics and evolution patterns of strain and electric resistivity were analyzed. The research pointed out the distinct difference in variation characteristics of strain and electrical fields between grouted reinforced fault-fracture zone and normal rock strata sections. This indicates that the grouting reinforcement effectively improve physical properties of rock strata in the fractured section, the stability of the rock strata at the fault-fracture zone was effectively increased, the degree of fault activation and deformation was relatively small, and roadway surrounding rock basically retained its original properties, pointing to high stability.
{"title":"Research on Surrounding Rock Stability Test of Tunneling Roadway under Complex Geological Conditions","authors":"Maoru Fu, Binyang Sun, Liquan Guo, Zan Ye, Xiangxiang Zhuang","doi":"10.4236/ojg.2022.123013","DOIUrl":"https://doi.org/10.4236/ojg.2022.123013","url":null,"abstract":"Different geological conditions are often encountered in the excavation of coal mine roadways, with fault-fracture zone being the most commonly seen complex geological conditions. Fault-fracture zone is characterized by complex lithologic property and joint development and can easily cause safety accidents when excavation burrows through the fault. Therefore, grouting reinforcement of fault-fracture zone is often implemented to ensure coal mine safety production. Based on the tunnel excavation case of −530 −650 m belt conveyor inclined roadway at Huainan Pan’er Coal Mine, borehole optical fiber and electrical testing technologies were applied to monitor and analyze the dynamics of the surrounding rock stability when roadway excavation passed through the F1 fault, and evaluate the effect of grouting reinforcement on fault-fracture zone. According to the results of optical fiber and electrical methods, the distributional characteristics and evolution patterns of strain and electric resistivity were analyzed. The research pointed out the distinct difference in variation characteristics of strain and electrical fields between grouted reinforced fault-fracture zone and normal rock strata sections. This indicates that the grouting reinforcement effectively improve physical properties of rock strata in the fractured section, the stability of the rock strata at the fault-fracture zone was effectively increased, the degree of fault activation and deformation was relatively small, and roadway surrounding rock basically retained its original properties, pointing to high stability.","PeriodicalId":63246,"journal":{"name":"地质学期刊(英文)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70650868","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-01-01DOI: 10.4236/ojg.2022.1210039
Simon Pierre Djroh, Gnamba Emmanuel Franck Gouedji, Ehui Aka, Boko Célestin Sombo, C. Picard, M. Audet, B. Bakayoko
{"title":"Magnetic Facies and Polymetallic Sulphides Deposit in the Mafic and Ultramafic Intrusions of Samapleu (Western Côte d’Ivoire)","authors":"Simon Pierre Djroh, Gnamba Emmanuel Franck Gouedji, Ehui Aka, Boko Célestin Sombo, C. Picard, M. Audet, B. Bakayoko","doi":"10.4236/ojg.2022.1210039","DOIUrl":"https://doi.org/10.4236/ojg.2022.1210039","url":null,"abstract":"","PeriodicalId":63246,"journal":{"name":"地质学期刊(英文)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70650016","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Safety of Mosul and Haditha Dams, West Iraq as Affected by Karstification","authors":"V. Sissakian, N. Al-Ansari, N. Adamo, J. Laue","doi":"10.4236/ojg.2022.121001","DOIUrl":"https://doi.org/10.4236/ojg.2022.121001","url":null,"abstract":"","PeriodicalId":63246,"journal":{"name":"地质学期刊(英文)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70650218","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-01-01DOI: 10.4236/ojg.2022.1211046
Asher Hategekamungu, N. Mhammdi, Amine Manar Mohamed
{"title":"Seismic Signature Analysis for Clarification of Mud Volcanoes from the New Mud Diapirs Discovered at the NE-SW Moroccan Atlantic Margin","authors":"Asher Hategekamungu, N. Mhammdi, Amine Manar Mohamed","doi":"10.4236/ojg.2022.1211046","DOIUrl":"https://doi.org/10.4236/ojg.2022.1211046","url":null,"abstract":"","PeriodicalId":63246,"journal":{"name":"地质学期刊(英文)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70650463","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-01-01DOI: 10.4236/ojg.2022.1212050
S. Abrakasa, K. Kouadio, Franck-Hilaire Essiagne, Emma Laure Oura
{"title":"A Probable Connection between a Bitumen Sample from the Western Niger Delta and Isan Well Sample from the Lower Cretaceous (Neocomian) Shale","authors":"S. Abrakasa, K. Kouadio, Franck-Hilaire Essiagne, Emma Laure Oura","doi":"10.4236/ojg.2022.1212050","DOIUrl":"https://doi.org/10.4236/ojg.2022.1212050","url":null,"abstract":"","PeriodicalId":63246,"journal":{"name":"地质学期刊(英文)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70650530","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Mohamadou Moustapha Thiam, Moumar Dieye, A. Dione, A. Ndiaye, M. Ndiaye, Salimata Ngom, R. Sarr
{"title":"Stratigraphy of the MSGBC Basin in the Western Part of Thies by Pixelation and Website Simulation (Senegal, West Africa)","authors":"Mohamadou Moustapha Thiam, Moumar Dieye, A. Dione, A. Ndiaye, M. Ndiaye, Salimata Ngom, R. Sarr","doi":"10.4236/ojg.2022.129032","DOIUrl":"https://doi.org/10.4236/ojg.2022.129032","url":null,"abstract":"","PeriodicalId":63246,"journal":{"name":"地质学期刊(英文)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70651049","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
During the early two decades of third millennium, many Mesozoic and Cenozoic biotas belong to plesiosaur, Titanosauriformes, titanosaurs, theropods, Mesoeucrocodiles, pterosaur, bird, snake, fishes, mammals, eucrocodiles, invertebrates and plants from Pakistan were found. Previously a few were formally published according to nomenclatural rules. Most of the Mesozoic vertebrates were formally published in August 2021, and the remaining Mesozoic and Cenozoic biotas are being formally described here.
{"title":"Formal Description of Mesozoic and Cenozoic Biotas Found from Pakistan","authors":"M. S. Malkani","doi":"10.4236/ojg.2021.119023","DOIUrl":"https://doi.org/10.4236/ojg.2021.119023","url":null,"abstract":"During the early two decades of third millennium, many Mesozoic and Cenozoic biotas belong to plesiosaur, Titanosauriformes, titanosaurs, theropods, Mesoeucrocodiles, pterosaur, bird, snake, fishes, mammals, eucrocodiles, invertebrates and plants from Pakistan were found. Previously a few were formally published according to nomenclatural rules. Most of the Mesozoic vertebrates were formally published in August 2021, and the remaining Mesozoic and Cenozoic biotas are being formally described here.","PeriodicalId":63246,"journal":{"name":"地质学期刊(英文)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47011042","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Non-marine Cretaceous rocks are widespread in northeastern Thailand and is well known as “the red bed” Khorat Group. The Sao Khua Formation is in the upper half of the Khorat Group which is comprised of six formations. This formation was named and defined at the type section for the rocks between the restricted PhraWihan Formation and the Phu Phan Formation in the drainage area of the Huai Sao Khua, an intermittent stream that flows westward parallel to the highway between Nong Bua Lamphu and UdonThani Provinces. It contains richest and most diverse vertebrate and invertebrate Mesozoic fossils in Thailand. The Sao Khua Formation is characterized by the sequence of the fining-upward successions of at least 4-5 megacycles throughout the formation with the total thickness ranging between 400-700 meters. Each cycle starts with a channel lag conglomerate which the clasts consist totally of re-worked calcrete nodules. The conglomerates were overlain by fine-to medium-grained sandstones of point bar deposit. Finally, the top part of each cycle was covered by a succession of fine-grained floodplain deposit that makes up 60%-70% of the formation. Paleosols are commonly found in the Sao Khua Formation within the floodplain sequence and their geochemistry indicates a semi-arid paleoclimate. Based on lithostratigraphy, the Sao Khua Formation is interpreted to have been deposited by a meandering river system under a semi-arid climate condition. The age of the formation is assigned as the Hauterivian-Late Barremian based on vertebrate and bivalves fossils.
{"title":"A Review of the Lithostratigraphy of the Early Cretaceous Sao Khua Formation, Khorat Group in Northeastern Thailand","authors":"P. Nulay, R. Arjwech","doi":"10.4236/ojg.2021.119021","DOIUrl":"https://doi.org/10.4236/ojg.2021.119021","url":null,"abstract":"Non-marine Cretaceous rocks are widespread in \u0000northeastern Thailand and is well known as “the red bed” Khorat Group. The Sao \u0000Khua Formation is in the upper half of the Khorat Group which is comprised of \u0000six formations. This formation was named and defined at the type section for \u0000the rocks between the restricted PhraWihan Formation and the Phu Phan Formation \u0000in the drainage area of the Huai Sao Khua, an intermittent stream that flows \u0000westward parallel to the highway between Nong Bua Lamphu and UdonThani \u0000Provinces. It contains richest and most diverse vertebrate and invertebrate \u0000Mesozoic fossils in Thailand. The Sao Khua Formation is characterized by the \u0000sequence of the fining-upward successions of at least 4-5 megacycles \u0000throughout the formation with the total thickness ranging between 400-700 \u0000meters. Each cycle starts with a channel lag conglomerate which the clasts \u0000consist totally of re-worked calcrete nodules. The conglomerates were overlain \u0000by fine-to medium-grained sandstones of point bar deposit. Finally, the top \u0000part of each cycle was covered by a succession of fine-grained floodplain \u0000deposit that makes up 60%-70% of the formation. Paleosols are commonly found \u0000in the Sao Khua Formation within the floodplain sequence and their geochemistry \u0000indicates a semi-arid paleoclimate. Based on lithostratigraphy, the Sao Khua \u0000Formation is interpreted to have been deposited by a meandering river system \u0000under a semi-arid climate condition. The age of the formation is assigned as \u0000the Hauterivian-Late Barremian based on vertebrate and bivalves fossils.","PeriodicalId":63246,"journal":{"name":"地质学期刊(英文)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44298753","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：