Proceedings of the Yorkshire Geological Society最新文献_第3页

Yorkshire Geological Society Registered Charity No. 220014 Society Proceedings 2018 约克郡地质学会注册慈善机构第220014号

IF 1 4区地球科学

Proceedings of the Yorkshire Geological Society Pub Date : 2019-05-23 DOI: 10.1144/pygs2019-005

Society

引用次数: 0

Neil Aitkenhead (1936–2018)

IF 1 4区地球科学

Proceedings of the Yorkshire Geological Society Pub Date : 2019-04-25 DOI: 10.1144/pygs2019-003

Society

引用次数: 0

Age of the Acadian deformation and Devonian granites in northern England: a review 英国北部阿卡迪亚变形时代与泥盆纪花岗岩:述评

IF 1 4区地球科学

Proceedings of the Yorkshire Geological Society Pub Date : 2018-12-19 DOI: 10.1144/PYGS2018-009

Society N. Woodcock, N. Soper, A. Miles

{"title":"Age of the Acadian deformation and Devonian granites in northern England: a review","authors":"\tSociety\t\t\tN. Woodcock, N. Soper, A. Miles","doi":"10.1144/PYGS2018-009","DOIUrl":"https://doi.org/10.1144/PYGS2018-009","url":null,"abstract":"Field evidence shows that emplacement of Devonian granites in northern England overlaps in space and time with the end of the supposed Acadian deformation in their country rocks. The age of this Acadian event in England and Wales is in need of review because of revised Rb-Sr and K-Ar decay constants and recently acquired radiometric ages on the granites. Published K-Ar and Ar-Ar cleavage ages recalculated to the new decay constants range from 404 to 394 Ma (Emsian, Early Devonian). Emplacement of the Skiddaw and Weardale granites at 398.8 ± 0.4 and 399.3 ± 0.7 Ma respectively is indicated by U-Pb zircon ages, and is compatible with the field evidence. However, emplacement of the Shap Granite at a Re-Os molybdenite age of 405.2 ± 1.8 Ma and at the youngest U-Pb zircon age of 403 ± 8 Ma matches the field evidence less well. The apparent paradox in these ages is resolved if the K-Ar ages record only the end of millions of years of cleavage formation. An earlier cluster of K-Ar and Ar-Ar cleavage ages at 426–420 Ma (Ludlow to Přidoli, late Silurian) dates a pre-Acadian resetting event soon after Iapetus closure, an event of uncertain significance. Ion microprobe U-Pb zircon ages for the Shap Granite have a mean of 415.6 ± 1.4 Ma but a range of 428–403 Ma, compatible with a long magmatic history. Thermal considerations suggest that this history was not at the upper crustal emplacement site but in a mid-crustal mush zone, now preserved at about 10 km depth as a component of the Lake District and North Pennine batholiths.","PeriodicalId":49665,"journal":{"name":"Proceedings of the Yorkshire Geological Society","volume":"30 5 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2018-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90208678","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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: 15

Emplacement of oil in the Devonian Weardale Granite of northern England 英格兰北部泥盆纪威尔代尔花岗岩中石油的就位

IF 1 4区地球科学

Proceedings of the Yorkshire Geological Society Pub Date : 2018-12-07 DOI: 10.1144/PYGS2018-008

Society Mas'ud Baba, J. Parnell, S. Bowden, J. Armstrong, Magali Perez, X. Wang

引用次数: 4

Summary of the new stratigraphic guide to the Chalk Group in the UK and Norwegian sectors of the North Sea 英国和挪威北海白垩组新地层指南摘要

IF 1 4区地球科学

Proceedings of the Yorkshire Geological Society Pub Date : 2018-10-16 DOI: 10.1144/PYGS2018-011

Society F. Gradstein, C. Waters

引用次数: 1

Miospores from the Brigantian stratotype section at Janny Wood, Cumbria 英国坎布里亚郡Janny Wood的布里甘层型剖面的小孢子

IF 1 4区地球科学

Proceedings of the Yorkshire Geological Society Pub Date : 2018-08-31 DOI: 10.1144/PYGS2017-004

Society D. McLean, B. Owens, David J. Bodman, F. McLean

引用次数: 7

The ‘tunnel’ valleys of East Anglia and Fenland, UK: subaerial, not subglacial 英国东安格利亚和芬兰的“隧道”山谷:在地面上，而不是在冰川下

IF 1 4区地球科学

Proceedings of the Yorkshire Geological Society Pub Date : 2018-08-31 DOI: 10.1144/PYGS2017-009

Society R. Gallois

{"title":"The ‘tunnel’ valleys of East Anglia and Fenland, UK: subaerial, not subglacial","authors":"\tSociety\t\t\tR. Gallois","doi":"10.1144/PYGS2017-009","DOIUrl":"https://doi.org/10.1144/PYGS2017-009","url":null,"abstract":"Integrated field surveys, continuously cored boreholes and seismic-reflection surveys in Fenland and the adjacent marine embayment of The Wash have revealed a network of concealed valleys. These are interpreted as a pre-glacial, cold-climate fluvial system that entered the North Sea via a gap in the Chalk escarpment at the mouth of The Wash. The pre-glacial Fenland valley system was overridden by an ice sheet during the Anglian Stage (Marine Isotope Stage (MIS) 12) when it became infilled with glacial deposits, mostly till and varved clay. East of the Chalk escarpment, a pre-glacial network of dipslope valleys drained directly to the North Sea. This was also overridden by Anglian ice and locally over-deepened, presumably by subglacial meltwater. The over-deepened parts have been referred to as tunnel valleys by various authors, but they can be more accurately described as glacially modified fluvial valleys. The analysis of high-resolution seismic-reflection profiles in the North Sea and adjacent areas has revealed complex anastomosing networks of tunnel valleys that were formed subglacially without a fluvial precursor or superimposed on possible fluvial systems that were glacially modified to the extent that they cannot now be confidently identified as fluvial in origin. In comparison, the concealed fluvial valleys of East Anglia and Fenland have been subject to minor glacial modifications, and are morphologically distinct from the North Sea examples. They should not be referred to as tunnel valleys. Prior to the Anglian glaciation, the rivers that flowed from the Midlands to the North Sea passed through one of two gaps in the Chalk escarpment, the Goring Gap in the south and a similar gap that is now concealed beneath the Wash. The field evidence does not support the presence of an additional gap in the intervening Bury St Edmunds area. A wide embayment to the north of this in the Thetford to Swaffham area in which the crest of the Chalk escarpment has been displaced eastwards by up to 20 km is an Anglian glaciation erosion feature.","PeriodicalId":49665,"journal":{"name":"Proceedings of the Yorkshire Geological Society","volume":"94 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2018-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90376945","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

The Chalk Group (Upper Cretaceous) of the Northern Province, eastern England – a review 英国东部北部省白垩群(上白垩统)的回顾

IF 1 4区地球科学

Proceedings of the Yorkshire Geological Society Pub Date : 2018-08-09 DOI: 10.1144/PYGS2017-010

S. Mitchell

{"title":"The Chalk Group (Upper Cretaceous) of the Northern Province, eastern England – a review","authors":"S. Mitchell","doi":"10.1144/PYGS2017-010","DOIUrl":"https://doi.org/10.1144/PYGS2017-010","url":null,"abstract":"A review of the Chalk of the Northern Province recognizes six formations, five of which (Hunstanton, Ferriby, Welton, Burnham and Flamborough formations) crop out in northern Norfolk, Lincolnshire and Yorkshire, and a sixth (Rowe Formation) is buried beneath the drift of Holderness. The Hunstanton, Ferriby and Flamborough formations are largely devoid of flints, whereas the Welton (other than its two basal members) and Burnham formations have nodular and tabular flints, respectively. Previous work on the lithostratigraphy and marker beds is presented, and an overview of the distribution of the more important macrofossils is provided. Especial attention is given to the succession at Speeton through the Hunstanton, Ferriby and lower Welton formations with details of the oxygen and carbon isotope signatures. The Speeton section is internationally important because of its expanded Albian-Mid Cenomanian succession. Small sections of the Burnham Formation in Speeton–Buckton cliffs are also presented for the first time. The appendix reviews the relevant Cretaceous stage boundaries with reference to the Chalk of the Northern Province together with details of the fossil zones that are used in this paper.","PeriodicalId":49665,"journal":{"name":"Proceedings of the Yorkshire Geological Society","volume":"1 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2018-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1144/PYGS2017-010","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44502709","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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: 7

The macrofauna of the Vale House Flints Member (Burnham Chalk Formation, Upper Turonian, Late Cretaceous) of Lincolnshire and a palaeoenvironmental reconstruction 林肯郡晚白垩世上Turonian Burnham白垩组Vale House燧石组大型动物群及其古环境重建

IF 1 4区地球科学

Proceedings of the Yorkshire Geological Society Pub Date : 2018-07-31 DOI: 10.1144/PYGS2017-387

Society Jonathan P. Green

引用次数: 2

The first British occurrence of khaidarkanite from Great Sled Dale, Angram Common, Keld, Swaledale, North Yorkshire, UK 在英国首次发现的海达肯石，来自英国北约克郡Keld, Swaledale, Angram Common, Great Sled Dale

IF 1 4区地球科学

Proceedings of the Yorkshire Geological Society Pub Date : 2018-07-31 DOI: 10.1144/PYGS2018-007

Society T. Cotterell, I. Dossett

引用次数: 0