地质学期刊(英文)最新文献_第9页

First Record of a Tylosaurine Mosasaur from the Latest Cretaceous Phosphates of Morocco 摩洛哥白垩纪晚期磷酸盐中发现的首个泰龙沧龙记录

地质学期刊(英文) Pub Date : 2022-01-01 DOI: 10.4236/ojg.2022.1211042

Trevor H Rempert, Brennan P. Martens, Alexander P. M. Vinkeles Melchers

引用次数: 4

Assessment of the Influence of Sulfuric Acid/Hydrogen Peroxide Mixture on Organic Sulfur Reduction of High Sulfur Coals and Their Chemical Composition 硫酸/双氧水混合物对高硫煤有机硫还原及其化学成分影响的评价

地质学期刊(英文) Pub Date : 2022-01-01 DOI: 10.4236/ojg.2022.123011

Mohammad Ehsan Ahmadi, Sh. Mesroghli, Bahare Hedayat, H. Nazerian, A. Shirazi, Adel Shirazy

引用次数: 3

Research on Surrounding Rock Stability Test of Tunneling Roadway under Complex Geological Conditions 复杂地质条件下隧道巷道围岩稳定性试验研究

地质学期刊(英文) Pub Date : 2022-01-01 DOI: 10.4236/ojg.2022.123013

Maoru Fu, Binyang Sun, Liquan Guo, Zan Ye, Xiangxiang Zhuang

{"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":"1 1","pages":""},"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}

引用次数: 0

Magnetic Facies and Polymetallic Sulphides Deposit in the Mafic and Ultramafic Intrusions of Samapleu (Western Côte d’Ivoire) Samapleu (Côte科特迪瓦西部)基性和超基性岩体磁相与多金属硫化物矿床

地质学期刊(英文) Pub Date : 2022-01-01 DOI: 10.4236/ojg.2022.1210039

Simon Pierre Djroh, Gnamba Emmanuel Franck Gouedji, Ehui Aka, Boko Célestin Sombo, C. Picard, M. Audet, B. Bakayoko

引用次数: 0

Safety of Mosul and Haditha Dams, West Iraq as Affected by Karstification 受喀斯特化影响的伊拉克西部摩苏尔和哈迪塞大坝安全

地质学期刊(英文) Pub Date : 2022-01-01 DOI: 10.4236/ojg.2022.121001

V. Sissakian, N. Al-Ansari, N. Adamo, J. Laue

引用次数: 0

Seismic Signature Analysis for Clarification of Mud Volcanoes from the New Mud Diapirs Discovered at the NE-SW Moroccan Atlantic Margin 摩洛哥大西洋边缘东北-西南新泥底坑泥火山的地震特征分析

地质学期刊(英文) Pub Date : 2022-01-01 DOI: 10.4236/ojg.2022.1211046

Asher Hategekamungu, N. Mhammdi, Amine Manar Mohamed

引用次数: 0

A Probable Connection between a Bitumen Sample from the Western Niger Delta and Isan Well Sample from the Lower Cretaceous (Neocomian) Shale 西尼日尔三角洲沥青样品与下白垩统(新科统)页岩Isan井样品的可能联系

地质学期刊(英文) Pub Date : 2022-01-01 DOI: 10.4236/ojg.2022.1212050

S. Abrakasa, K. Kouadio, Franck-Hilaire Essiagne, Emma Laure Oura

引用次数: 0

Stratigraphy of the MSGBC Basin in the Western Part of Thies by Pixelation and Website Simulation (Senegal, West Africa) 埃塞俄比亚西部MSGBC盆地的像素化与网站模拟地层学研究(西非塞内加尔)

地质学期刊(英文) Pub Date : 2022-01-01 DOI: 10.4236/ojg.2022.129032

Mohamadou Moustapha Thiam, Moumar Dieye, A. Dione, A. Ndiaye, M. Ndiaye, Salimata Ngom, R. Sarr

引用次数: 0

Formal Description of Mesozoic and Cenozoic Biotas Found from Pakistan 巴基斯坦中新生代生物群的正式描述

地质学期刊(英文) Pub Date : 2021-09-07 DOI: 10.4236/ojg.2021.119023

M. S. Malkani

引用次数: 5

A Review of the Lithostratigraphy of the Early Cretaceous Sao Khua Formation, Khorat Group in Northeastern Thailand 泰国东北部Khorat群早白垩世Sao Khua组岩石地层研究

地质学期刊(英文) Pub Date : 2021-09-07 DOI: 10.4236/ojg.2021.119021

P. Nulay, R. Arjwech

{"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":" ","pages":""},"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}

引用次数: 4