Geological Curator最新文献_第5页

Francis Basset, 1st Baron De Dunstanville and Baron Basset of Stratton, and his mineral specimens at the Bath Royal Literary and Scientific Institution and the Natural History Museum, London 弗朗西斯·巴塞特，第一代德·邓斯坦维尔男爵和斯特拉顿的巴塞特男爵，以及他在伦敦巴斯皇家文学和科学研究所和自然历史博物馆的矿物标本

Geological Curator Pub Date : 2019-12-01 DOI: 10.55468/gc1478

T. Cotterell, M. Williams

引用次数: 0

A geological tale of two cities: Cuvier and Brongniart's map of Paris (1811) and Conybeare and De la Beche's map of Bath (1823) 两个城市的地质故事:居维叶和布隆尼亚尔的巴黎地图(1811年)和康尼贝尔和德拉贝歇的巴斯地图(1823年)

Geological Curator Pub Date : 2019-12-01 DOI: 10.55468/gc1477

K. Cook

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44th Annual General Meeting 第44届年度股东大会

Geological Curator Pub Date : 2019-12-01 DOI: 10.55468/gc1484

Geological Curators' Group

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Pyrite decay - into the great unknown 黄铁矿的衰变-进入伟大的未知

Geological Curator Pub Date : 2019-06-01 DOI: 10.55468/gc409

C. Baars

{"title":"Pyrite decay - into the great unknown","authors":"C. Baars","doi":"10.55468/gc409","DOIUrl":"https://doi.org/10.55468/gc409","url":null,"abstract":"More than 200 years of research have brought us little closer to understanding, let alone controlling, pyrite oxidation in geological collections. This appears paradoxical, because thousands of papers have been written on the deterioration of iron sulfides by geochemists, engineers and conservators. But whilst reaction products and pathways are characterised well, the causes of deterioration of different types of iron sulfide specimens in geological collections remain elusive. To make matters even more complicated for the museum conservator, published guidelines for the management of such specimens are patchy and often contradictory. Currently available condition assessment methodologies are barely suitable for routine monitoring of large collections, results of specimen monitoring exercises are not necessarily replicable, and, in the absence of guidance on suitable storage conditions, triggers for, and suitability of, conservation actions are difficult to determine. A new approach is required to end the guess work and add some substance, based on evidence, to the collection care of geological collections in museums. This paper does not answer these questions but introduces a framework for a research agenda that would underpin a robust approach to the delivery of preventive conservation of geological collections. This includes a definition of what kind of material change in minerals constitutes damage; categorisation of damage/change; development of a protocol for routine condition assessments; the definition of an adequate storage environment; and testing rigorously the suitability of conservation treatments.","PeriodicalId":203203,"journal":{"name":"Geological Curator","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122843348","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

The role of pyrite in fossilisation and its potential instability 黄铁矿在石化过程中的作用及其潜在的不稳定性

Geological Curator Pub Date : 2019-06-01 DOI: 10.55468/gc402

K. Miles

{"title":"The role of pyrite in fossilisation and its potential instability","authors":"K. Miles","doi":"10.55468/gc402","DOIUrl":"https://doi.org/10.55468/gc402","url":null,"abstract":"Pyrite often forms in organic-rich marine sediments through bacterial action. Bacteria reduce organics to form bisulphide, which reacts in turn with dissolved iron in seawater to form pyrite. Consequently, it is frequently found in stratigraphic formations that consist of marine clays. Pyrite can be involved in fossilisation through a number of ways, including complete replacement, as infill in permineralised bone, or simply as microcrystals finely disseminated through the fossil and matrix. Replacement by pyrite can often be easily recognised: the fossil may have a gold or brassy metallic lustre. Infill is harder to recognise, and disseminated pyrite even more so. Pyrite in fossils may be stable or unstable- in its stable form, pyritised fossils will generally retain their shiny, metallic appearance. Pyrite preservation and stability can vary even within the same specimen. Fossils preserved in pyrite can be prone to oxidation, particularly at high relative humidities. There are a number of signs that indicate oxidation is occurring, depending on the severity of the condition. One or more of the following may be present: a sulphurous smell, white or yellow powdery crystals on the surface of the specimen, expansion cracks, as well as acid burns on associated labels, boxes and drawers. Such burns often have a characteristic ovoid appearance. If left unchecked, pyrite oxidation can completely destroy a specimen and its labels.","PeriodicalId":203203,"journal":{"name":"Geological Curator","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128888322","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

Keep calm and call the conservator: it is only pyrite decay and your specimen may be salvageable 保持冷静，打电话给管理员:这只是黄铁矿的腐烂，你的标本可能还可以抢救

Geological Curator Pub Date : 2019-06-01 DOI: 10.55468/gc406

N. Larkin

引用次数: 0

The Dendermonde Mammoth: fighting pyrite decay and the preservation of unique paleontological heritage 猛犸象:对抗黄铁矿腐烂和保存独特的古生物遗产

Geological Curator Pub Date : 2019-06-01 DOI: 10.55468/gc408

Anthonie Hellemond

{"title":"The Dendermonde Mammoth: fighting pyrite decay and the preservation of unique paleontological heritage","authors":"Anthonie Hellemond","doi":"10.55468/gc408","DOIUrl":"https://doi.org/10.55468/gc408","url":null,"abstract":"The Dendermonde mammoth is a unique skeleton of a woolly mammoth (Mammuthus primigenius) which was found between 1968-1969, in the area around the city of Dendermonde (Oost-Vlaanderen - Belgium). This 29,000 year old skeleton was mounted in 1975 by its finder Hugo De Potter in the attic of the 'Vleeshuismuseum'. The skeleton consists of ca. 74 original elements. Some of these elements originate from the Hofstade collection of the Royal Belgian Institute of Natural Sciences in Brussels (RBINS). Since 1990 the skeleton has not been chemically treated and no monitoring of temperature or relative humidity took place. As a result of years of exposure and lack of any treatment, the bones of the Dendermonde mammoth were covered with a thick layer of dust and affected by pyrite decay. The skeleton was showing several visual outbursts of pyrite blooming out of the fossilised cartilage as well as numerous desiccation cracks. By the end of March 2017 the Belgian Paleontological Association (BVP), the Royal Belgian Institute of Natural Sciences (RBINS) and the city museum of Dendermonde (Stedelijk museum Dendermonde) decided to restore the skeleton in order to preserve an important piece of Belgian paleontological heritage.","PeriodicalId":203203,"journal":{"name":"Geological Curator","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125129553","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

Obituary: Joy Irving (1951 - 2019) 讣告:乔伊·欧文(1951 - 2019)

Geological Curator Pub Date : 2019-06-01 DOI: 10.55468/gc413

Monica Price, J. Hay

引用次数: 0

Prehistoric human material in the Nottingham Natural History Museum, and the Cresswell Crags Museum and Heritage Centre 诺丁汉自然历史博物馆的史前人类材料，克雷斯韦尔峭壁博物馆和遗产中心

Geological Curator Pub Date : 2019-06-01 DOI: 10.55468/gc412

N. Mantl

引用次数: 0

Comparing sulphamic acid to acetic and formic acids for the preparation of large mesozoic marine reptile fossils, and a method for monitoring residual acid and salt removal following acid preparation 磺胺与乙酸、甲酸制备大型中生代海洋爬行动物化石的比较，以及酸制备后残酸除盐的监测方法

Geological Curator Pub Date : 2019-06-01 DOI: 10.55468/gc411

L. Noè, M. Gómez-Pérez, S. Padilla-Bernal

{"title":"Comparing sulphamic acid to acetic and formic acids for the preparation of large mesozoic marine reptile fossils, and a method for monitoring residual acid and salt removal following acid preparation","authors":"L. Noè, M. Gómez-Pérez, S. Padilla-Bernal","doi":"10.55468/gc411","DOIUrl":"https://doi.org/10.55468/gc411","url":null,"abstract":"Chemical preparation is an important technique in palaeontology that uses a dilute aqueous acid solution to remove calcareous matrix from fossils, but which leads to the evolution of salts as a by-product. Acid preparation is usually undertaken using formic and acetic acids, whereas sulphamic acid has only rarely been considered. Sulphamic acid is a strong acid, with many industrial uses, but which has fewer health and safety concerns, and produces fewer irritant fumes, than formic or acetic acids. Three comparative procedures were undertaken to understand the action of sulphamic acid in relation to formic and acetic acids, using calcareous matrix from Colombian (South American) large Mesozoic marine reptiles. The results of these procedures indicate sulphamic acid acts in a comparable manner to formic acid, and more rapidly than acetic acid, in terms of rate of matrix removal. Afourth procedure investigated the removal of acid and salt residues following sulphamic acid preparation of a Colombian large Mesozoic marine reptile fossil, a process essential for the long-term survival of any acid prepared specimen. The fossil was immersed in type 1 deionized water, and increasing electrical conductivity was used as a proxy for ionic leaching. The results imply the preparators 'rule of thumb' of soaking a specimen in water for three times the length of time spent in the acid solution, is inadequate to ensure satisfactory removal of acid and salt residues. Although tested on a specimen prepared using sulphamic acid, the technique for post-preparation ion removal is equally be applicable to all fossils prepared using sulphamic, formic or acetic acids in aqueous solution.","PeriodicalId":203203,"journal":{"name":"Geological Curator","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127555740","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