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Lowermost Devonian conodonts from the Setul Group, northwestern Peninsular Malaysia 马来西亚半岛西北部Setul群泥盆纪最底的牙形刺
Journal of the Geological Society of Japan Pub Date : 2017-11-15 DOI: 10.5575/GEOSOC.2017.0040
Yui Takahashi, Sachiko Agematsu, Mat Niza Abdul Rahman, K. Sashida
{"title":"Lowermost Devonian conodonts from the Setul Group, northwestern Peninsular Malaysia","authors":"Yui Takahashi, Sachiko Agematsu, Mat Niza Abdul Rahman, K. Sashida","doi":"10.5575/GEOSOC.2017.0040","DOIUrl":"https://doi.org/10.5575/GEOSOC.2017.0040","url":null,"abstract":"©The Geological Society of Japan 2017 989 Abstract: The Setul Group, which contains a thick Lower Ordovician to Early Devonian limestone succession, occurs in northwestern Perlis State and the Langkawi Islands, Peninsular Malaysia. We report a lowermost Devonian conodont fauna characterized by Flajsella stygia and Flajsella streptostygia from a limestone section near the small town of Kaki Bukit, in what was previously considered to be Ordovician limestone. The studied limestone corresponds to the youngest part of the Mempelam Limestone. Nine species of conodonts in six genera are systematically investigated herein, of which three species Dvorakia amsdeni, D. philipi and F. streptostygia are the first reports in the Peninsula Malaysia. The stratigraphic correlations of the rock are also briefly discussed. Report","PeriodicalId":264556,"journal":{"name":"Journal of the Geological Society of Japan","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114754979","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: 1
Cyrtospirifer ainosawensis sp. nov., from the Upper Devonian Ainosawa Formation, Soma, Abukuma Mountains, northeastern Japan Cyrtospirifer ainosawensis sp. nov.，产自日本东北部武间山索马上泥盆统Ainosawa组
Journal of the Geological Society of Japan Pub Date : 2017-08-15 DOI: 10.5575/GEOSOC.2017.0011
J. Tazawa, Hiroaki Inose, N. Kaneko
{"title":"Cyrtospirifer ainosawensis sp. nov., from the Upper Devonian Ainosawa Formation, Soma, Abukuma Mountains, northeastern Japan","authors":"J. Tazawa, Hiroaki Inose, N. Kaneko","doi":"10.5575/GEOSOC.2017.0011","DOIUrl":"https://doi.org/10.5575/GEOSOC.2017.0011","url":null,"abstract":"©The Geological Society of Japan 2017 653 Abstract: This paper describes a new species of Cyrtospirifer (Late Devonian Brachiopoda) from the Ainosawa Formation of Soma, Abukuma Mountains (South Kitakami Belt), northeast-ern Japan, termed Cyrtospirifer ainosawensis, sp. nov. by Tazawa, Inose and Kaneko. This new species most resembles Cyrtospirifer choanjiensis of Tazawa (2017), described from the Upper Devonian of Choanji, southern Kitakami Mountains (South Kitakami Belt), northeastern Japan. Report","PeriodicalId":264556,"journal":{"name":"Journal of the Geological Society of Japan","volume":"77 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115969726","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: 2
北海道厚真（あつま）川を遡上した2011年東北沖地震津波による堆積物の形成過程および津波波形との対応 溯上北海道厚真川的2011年东北冲地震海啸引起的沉积物形成过程及海啸波形的对应
Journal of the Geological Society of Japan Pub Date : 2017-07-15 DOI: 10.5575/GEOSOC.2017.0007
Katsuichi Oota, T. Sagayama, Tetsuya Inui, K. Hoyanagi
{"title":"北海道厚真（あつま）川を遡上した2011年東北沖地震津波による堆積物の形成過程および津波波形との対応","authors":"Katsuichi Oota, T. Sagayama, Tetsuya Inui, K. Hoyanagi","doi":"10.5575/GEOSOC.2017.0007","DOIUrl":"https://doi.org/10.5575/GEOSOC.2017.0007","url":null,"abstract":"","PeriodicalId":264556,"journal":{"name":"Journal of the Geological Society of Japan","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124346327","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
岩石 vs ファインセラミックス 岩石vs新型陶瓷
Journal of the Geological Society of Japan Pub Date : 2017-06-15 DOI: 10.5575/GEOSOC.2017.0009
岳彦 平賀
{"title":"岩石 vs ファインセラミックス","authors":"岳彦 平賀","doi":"10.5575/GEOSOC.2017.0009","DOIUrl":"https://doi.org/10.5575/GEOSOC.2017.0009","url":null,"abstract":"","PeriodicalId":264556,"journal":{"name":"Journal of the Geological Society of Japan","volume":"146 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123376107","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: 1
A Pleistocene rhinocerotid (Mammalia, Perissodactyla) from the Bisan-Seto area, western Japan 日本西部比森濑户地区的一种更新世犀牛类(哺乳纲，长趾目)
Journal of the Geological Society of Japan Pub Date : 2017-06-15 DOI: 10.5575/GEOSOC.2017.0004
Naoto Handa, Y. Takechi
{"title":"A Pleistocene rhinocerotid (Mammalia, Perissodactyla) from the Bisan-Seto area, western Japan","authors":"Naoto Handa, Y. Takechi","doi":"10.5575/GEOSOC.2017.0004","DOIUrl":"https://doi.org/10.5575/GEOSOC.2017.0004","url":null,"abstract":"©The Geological Society of Japan 2017 433 Abstract: We describe the characteristics of a Rhinocerotidae femur and tibia found within sea-floor sediments in the Bisan-Seto region, western Japan, a region for which the mammal fauna has been assigned the Middle Pleistocene age. Based on morphological and metrical comparisons between the studied specimens and those from Pleistocene rhinoceroses from Eurasia (Stephanorhinus, Coelodonta, and Rhinoceros), the studied specimens can be referred to as Stephanorhinus sp., although their more specific identification is not possible given a lack of further skeletal elements. Nevertheless, our study confirms the presence of Stephanorhinus during the Middle Pleistocene in Japan and supports similar finds elsewhere in western Japan (e.g., Isa in Yamaguchi Prefecture). Report","PeriodicalId":264556,"journal":{"name":"Journal of the Geological Society of Japan","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127611997","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: 3
口永良部島・新岳の2014・2015年噴火：水蒸気噴火の可能性 口永良部岛、新岳2014、2015年火山喷发:水蒸气喷发的可能性
Journal of the Geological Society of Japan Pub Date : 2017-05-15 DOI: 10.5575/GEOSOC.2017.0018
哲夫 小林
{"title":"口永良部島・新岳の2014・2015年噴火：水蒸気噴火の可能性","authors":"哲夫 小林","doi":"10.5575/GEOSOC.2017.0018","DOIUrl":"https://doi.org/10.5575/GEOSOC.2017.0018","url":null,"abstract":"","PeriodicalId":264556,"journal":{"name":"Journal of the Geological Society of Japan","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116316049","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
Re-evaluation of the history of phreatic eruptions from Atosanupuri Volcano, eastern Hokkaido, Japan:: Inferred from 14 C ages and borehole cores of Japan Meteorological Agency@@@炭素年代および気象庁ボーリングコアからの検討 Re-evaluation of the history of phreatic eruptions from Atosanupuri Volcano, eastern Hokkaido，japan::Inferred from 14c ages and borehole cores of Japan Meteorological Agency@@@来自碳年代和气象局钻探核心的探讨
Journal of the Geological Society of Japan Pub Date : 2017-05-15 DOI: 10.5575/GEOSOC.2016.0051
T. Hasegawa, M. Nakagawa, I. Miyagi
{"title":"Re-evaluation of the history of phreatic eruptions from Atosanupuri Volcano, eastern Hokkaido, Japan:: Inferred from 14 C ages and borehole cores of Japan Meteorological Agency@@@炭素年代および気象庁ボーリングコアからの検討","authors":"T. Hasegawa, M. Nakagawa, I. Miyagi","doi":"10.5575/GEOSOC.2016.0051","DOIUrl":"https://doi.org/10.5575/GEOSOC.2016.0051","url":null,"abstract":"Atosanupuri Volcano is one of the active volcanoes, located in the Akan–Shiretoko Volcanic Chain, eastern Hokkaido. Tephro-strati-graphic and tephro-chronologic studies were conducted on two drill cores and new outcrops around the volcano to reveal a recent history of the explosive eruptions. Widespread tephra layers, such as the 10 th century B-Tm tephra, and the 2 . 7 cal. ka BP Ta-c 2 tephra were distinguished by the geochemical composition of volcanic glass. In addition, 14 C ages of organic samples underlying the eruption deposits were obtained. Using these data, we identified seven phreatic eruption deposits, At-ph 1 to At-ph 7 , overlying the T-c 2 tephra; these include the previously described At-a and At-b tephras. At-ph 7 yields the oldest 14 C calibrated age ( 2 . 5 – 2 . 7 cal. ka), and the deposition ages of At-ph 6 to At-ph 1 range from cal. AD 554 to 1678 . At-ph 4 (At-b) is the thickest phreatic ejecta, with a volume of ~ 3 × 10 6 m 3 . Five phreatic eruptions occurred from Atosanupuri Volcano between 1 , 500 and 1 , 000 cal. BP. The youngest eruption, At-ph 1 (At-a) occurred at 300 ~ 400 cal. BP, which might be documented in historical records. phreatic","PeriodicalId":264556,"journal":{"name":"Journal of the Geological Society of Japan","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133741743","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: 2
沖縄トラフ熱水域の科学掘削（IODP331次航海）におけるポストドリリング研究展開 冲绳海槽热液区科学挖掘(IODP331次航海)开展后钻探研究
Journal of the Geological Society of Japan Pub Date : 2017-04-15 DOI: 10.5575/GEOSOC.2017.0010
高井研
{"title":"沖縄トラフ熱水域の科学掘削（IODP331次航海）におけるポストドリリング研究展開","authors":"高井研","doi":"10.5575/GEOSOC.2017.0010","DOIUrl":"https://doi.org/10.5575/GEOSOC.2017.0010","url":null,"abstract":"","PeriodicalId":264556,"journal":{"name":"Journal of the Geological Society of Japan","volume":"123 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130446403","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
A new model for a hydrothermal circulation system and limit of the life 热液循环系统的新模型及生命极限
Journal of the Geological Society of Japan Pub Date : 2017-04-15 DOI: 10.5575/GEOSOC.2017.0014
J. Ishibashi, K. Yanagawa, K. Takai
{"title":"A new model for a hydrothermal circulation system and limit of the life","authors":"J. Ishibashi, K. Yanagawa, K. Takai","doi":"10.5575/GEOSOC.2017.0014","DOIUrl":"https://doi.org/10.5575/GEOSOC.2017.0014","url":null,"abstract":"Integrated Ocean Drilling Program (IODP) Expedition 331 was conducted in September 2010 and provided an unique opportunity to directly access the subseafloor environment beneath an active hydrothermal field in the Iheya North Knoll in the mid-Okinawa Trough. Localities of five drilled sites (C0013–C0017) along the slope of a knoll cover the hydrothermal field, represented by vigorous high temperature fluid venting from the active hydrothermal mound named NBC. Drilling at Site C0016 at the flank part of the mound revealed hydrothermal sulfide/sulfate mineralization comparable to that in Kurokotype volcanic massive sulfide deposit. From Sites C0013 and C0014 located 100 and 450 m east from the mound, evidence for lateral intrusion of the hydrothermal component was observed by intense and widespread hydrothermal alteration, stepwise change in profiles of pore fluid chemistry, and drastic change in physical properties of the sediment. On the other hand, downward infiltration of seawater was recognized even at 50 m below the seafloor at Site C0017 located 1550 m apart from the mound. These results suggest the mixing region between the high-temperature and reductive hydrothermal environment and the low-temperature and oxidative seawater-dominant environment outspreads over a km scale beneath the active hydrothermal field. Furthermore, microbiological studies revealed that habitat of subvent microorganism significantly overlaps this mixing region. Expedition 331 was successful in providing a new model for a hydrothermal fluid circulation system that develops in a geologic setting dominated by volcanic sediment.","PeriodicalId":264556,"journal":{"name":"Journal of the Geological Society of Japan","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125899857","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: 1
Discovery of Cyrtospirifer (Late Devonian Brachiopoda) from Choanji in the South Kitakami Belt, northeastern Japan 日本东北北上南带川池地区发现Cyrtospirifer(晚泥盆世腕足动物)
Journal of the Geological Society of Japan Pub Date : 2017-02-15 DOI: 10.5575/GEOSOC.2016.0059
J. Tazawa
{"title":"Discovery of Cyrtospirifer (Late Devonian Brachiopoda) from Choanji in the South Kitakami Belt, northeastern Japan","authors":"J. Tazawa","doi":"10.5575/GEOSOC.2016.0059","DOIUrl":"https://doi.org/10.5575/GEOSOC.2016.0059","url":null,"abstract":"©The Geological Society of Japan 2017 101 Abstract: Three Cyrtospirifer species (Cyrtospirifer choanjiensis sp. nov., Cyrtospirifer sp. 1 and Cyrtospirifer sp. 2) are described for the first time from Choanji, eastern part of the South Kitakami Belt, northeastern Japan. The occurrence of the Late Devonian brachiopod Cyrtospirifer from Choanji indicates the presence of Upper Devonian rocks in the Choanji area. Report","PeriodicalId":264556,"journal":{"name":"Journal of the Geological Society of Japan","volume":"66 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133447267","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
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