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Brewsterite-Ba and Harmotome from the Wicklow Lead Mines, Co. Wicklow, Ireland 爱尔兰威克洛威克洛铅矿公司的Brewsterite Ba和Harmotme
Q4 Earth and Planetary Sciences Pub Date : 2022-01-01 DOI: 10.3318/IJES.2005.23.1.101
D. Green, A. Tindle, S. Moreton
Abstract:The zeolite group minerals brewsterite-Ba and harmotome occur as minor latestage primary phases in the low-temperature Pb-Zn veins at Glendalough and Glendasan, Co. Wicklow. Brewsterite-Ba was identified on a single specimen from the Old Luganure Mine. Harmotome occurs at the Glendalough Mine, the Foxrock Mine and the Old Luganure Mine. Quantitative analyses of crystals of brewsterite-Ba reveal the most barium-rich composition yet reported: ($Ba_{1.88},Sr_{0.02},K_{0.01},Na_{0.01}$) [$Al_{4.03}Si_{12.02}O_{32}$]-$nH_{2}O$. This is close to the hypothetical barium end member. The harmotome is also barium-rich. It contains lesser amounts of sodium and potassium, but no calcium. This is the first record of brewsterite-Ba from Ireland.
摘要/ Abstract摘要:在Glendalough和Glendasan, Co. Wicklow的低温铅锌矿脉中,沸石族矿物brewsterite-Ba和harmotome作为次要的晚期原生相出现。在旧卢格努尔矿的单一标本上鉴定出了Brewsterite-Ba。harmonome出现在Glendalough矿、Foxrock矿和Old Luganure矿。对brewsterte - ba晶体进行定量分析,发现了迄今为止报道的最富钡的成分:($Ba_{1.88},Sr_{0.02},K_{0.01},Na_{0.01}$) [$Al_{4.03}Si_{12.02}O_{2}O$]-$nH_{2}O$。这和假设的钡端元很接近。和声也是富含钡的。它含有少量的钠和钾,但不含钙。这是来自爱尔兰的brewsterite-Ba的第一个记录。
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引用次数: 2
Abstracts of the 47th Irish Geological Research Meeting, Galway, February 2004 第47届爱尔兰地质研究会议摘要,戈尔韦,2004年2月
Q4 Earth and Planetary Sciences Pub Date : 2022-01-01 DOI: 10.3318/ijes.2004.22.1.55
I. Sanders
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引用次数: 0
ENIGMATIC (BAR-LIKE) MICROSCOPIC PHOSPHATIC ELEMENTS FROM THE LOWER MISSISSIPPIAN OF IRELAND 爱尔兰密西西比河下游神秘的(棒状)微观磷元素
Q4 Earth and Planetary Sciences Pub Date : 2022-01-01 DOI: 10.3318/IJES.2010.28.61
Mags Duncan
Abstract:Enigmatic Bar-like phosphatic microfossils have been isolated from early Mississippian acid insoluble residues of fully marine facies in Ireland where they are usually associated with other phosphatic elements such as conodonts and fish microfossils. Seven Bar-like element morphotypes are described together with a discussion on the possible affinities of these elements. Where coexisting in one sample, a number of the morphotypes resemble the morphology of disarticulated laminae of conulariid exoskeleton. Others differ and appear as discrete elements; it is possible that they represent different morphological parts of a single organism. Comparison of these elements is also made to morphologically similar elements occurring back as far as the Ordovician. However, without articulated material their identification remains in open nomenclature.
摘要/ Abstract摘要:从爱尔兰早密西西比期的全海相酸不溶性残留物中分离出了神秘的条状磷微化石,通常与其他磷元素(如牙形刺和鱼类微化石)有关。描述了7种棒状元素形态,并讨论了这些元素可能的亲和关系。当在一个样品中共存时,许多形态类型类似于圆锥状外骨骼的分离层的形态。另一些则不同,表现为离散的元素;它们有可能代表同一生物的不同形态部分。将这些元素与早在奥陶纪就出现的形态相似的元素进行了比较。然而,没有明确的材料,他们的识别仍然是开放的命名法。
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引用次数: 0
MAJOR ION CHEMISTRY IN A COASTAL KARSTIC GROUNDWATER RESOURCE LOCATED IN WESTERN IRELAND 西爱尔兰海岸岩溶地下水资源中的主要离子化学
Q4 Earth and Planetary Sciences Pub Date : 2022-01-01 DOI: 10.3318/IJES.2012.30.13
B. Petrunic, F. Einsiedl, G. Duffy
Abstract:The extent of seawater intrusion in a coastal karstic aquifer system along the southern shore of Galway Bay, western Ireland, was investigated using spatial and temporal variations in major ion chemistry and nutrient levels. The background water was Ca- and bicarbonate-rich with variable concentrations of Mg. In general, higher Mg concentrations were detected in the Gort lowlands region compared with sites in the Burren, likely due to contact with dolomite layers. Nitrate concentrations ranged from 1.3mg/L to 78.5mg/L as NO3, and dissolved organic carbon concentrations ranged from 0.6mg/L to 4.9mg/L, suggesting that anthropogenic contamination due to surface activities occurs at some locations in the study area. Based on salinity values, on Na and Cl concentrations and on Cl/Br mass ratios, five of the 24 operational wells sampled were in a saltwater-influenced zone. Three of these wells contained <0.5% seawater, and the extent of saltwater influence was dependent on seasonal conditions. Water levels were monitored in six unused wells, and at four of these locations groundwater levels responded to the tidal variations in Galway Bay. During the study period, seawater intrusion and/or tidal influence on groundwater levels was found to occur within 5km of the coastline. The inland extent of seawater intrusion on the karst system is dependent on the hydrologic conditions at the time of measurement. The results provide a baseline dataset from which the influence of climatic and environmental changes on the aquifer system can be assessed in the future.
摘要:利用主要离子化学和营养水平的时空变化,研究了爱尔兰西部戈尔韦湾南岸沿海岩溶含水层系统中海水入侵的程度。背景水富含Ca和碳酸氢盐,含不同浓度的Mg。一般来说,与Burren地区相比,Gort低地地区的Mg浓度更高,这可能是由于与白云石层接触。硝酸盐浓度范围为1.3mg/L至78.5mg/L(以NO3计),溶解有机碳浓度范围为0.6mg/L至4.9mg/L,表明研究区域的一些位置发生了由地表活动引起的人为污染。根据盐度值、Na和Cl浓度以及Cl/Br质量比,采样的24口操作井中有5口位于盐水影响区。其中三口井含有<0.5%的海水,海水影响的程度取决于季节条件。对六口未使用的水井的水位进行了监测,其中四口水井的地下水位对戈尔韦湾的潮汐变化做出了反应。在研究期间,发现海水入侵和/或潮汐对地下水位的影响发生在海岸线5km范围内。海水入侵岩溶系统的内陆程度取决于测量时的水文条件。这些结果提供了一个基线数据集,将来可以根据该数据集评估气候和环境变化对含水层系统的影响。
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引用次数: 9
THE CHALK OUTLIER AT BALLYDEENLEA, CO. KERRY; A STORY OF DISCOVERY 克里郡巴利迪恩利的粉笔异常值;一个发现的故事
Q4 Earth and Planetary Sciences Pub Date : 2022-01-01 DOI: 10.3318/IJES.2011.29.27
G. L. Davies
Abstract:In 1960 P.T. Walsh discovered a small outlier of Upper Cretaceous chalk at Ballydeenlea to the north of Killarney, Co. Kerry. The background to the discovery is explained, and evidence is presented suggesting that M.F. O'Meara of the Geological Survey of Ireland may have visited the site in July 1942, eighteen years before Walsh drew the attention of the geological world to Ballydeenlea.
摘要/ Abstract摘要:1960年,P.T. Walsh在克里州基拉尼北部的Ballydeenlea发现了一小块上白垩统的异常物。书中解释了这一发现的背景,并提供了证据,表明爱尔兰地质调查局的M.F. O'Meara可能在1942年7月访问过这个地点,比沃尔什引起地质学界对巴利迪恩利的注意早了18年。
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引用次数: 1
The Geomorphology of Gola, North-West Ireland 爱尔兰西北部戈拉的地貌
Q4 Earth and Planetary Sciences Pub Date : 2022-01-01 DOI: 10.3318/IJES.2015.33.55
J. Knight, H. Burningham
Abstract:AbstractThe island of Gola, offshore north-west County Donegal, Ireland, shows a range of geomorphic and sedimentary features of Pleistocene and Holocene age, but hitherto these features have not been described. This study reports on the main glacigenic (Pleistoceneage) and coastal (Holocene) geomorphic features, their associated sediments and their environmental interpretations in the context of regional Pleistocene and Holocene climate change. The contemporary geomorphology of Gola is strongly controlled by its underlying geology and Pleistocene glacial history (which includes its paraglacial inheritance), and its exposed Atlantic-facing location.
摘要:爱尔兰多尼戈尔郡西北近海的戈拉岛显示出更新世和全新世的一系列地貌和沉积特征,但迄今为止尚未对这些特征进行描述。本研究报告了区域更新世和全新世气候变化背景下的主要冰川地貌(Pleistocceneage)和海岸地貌(全新世)特征、相关沉积物及其环境解释。戈拉的当代地貌受到其潜在地质和更新世冰川历史(包括其副冰川遗产)以及其暴露的面向大西洋的位置的强烈控制。
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引用次数: 1
A SEDIMENT SINK FOR POSSIBLE TERTIARY AEOLIAN SEDIMENT IN GALWAY BAY, WESTERN IRELAND 西爱尔兰戈尔韦湾可能存在的第三纪风成沉积物汇
Q4 Earth and Planetary Sciences Pub Date : 2022-01-01 DOI: 10.3318/IJES.2012.30.41
D. Williams, M. Barham
Abstract:There is substantial evidence to suggest that Ireland during the Tertiary Period was subject to a period of intense chemical weathering. Two exposures illustrating this environment in western Ireland are described, adding to the known examples of this type of weathering elsewhere in Ireland. The surface features of quartz sand grains may be used to distinguish the environments through which they have passed during transport and deposition. Quartz-grain surface features photographed by a scanning electron microscope are described from a sediment facies, ∼10,000 years old, retrieved from cores taken from beneath the floor of Galway Bay. Many of these show the action of glacial activity by characteristic fracture patterns, as might be expected in Holocene sediment in an Irish context. Some of the grains, however, show features that suggest a prior aeolian component to their transport history. These grains are compared with quartz grains previously described and with the product of Tertiary Period weathering recovered from a sand pit at Pollnahallia, Co. Galway. Similarities suggest that some of the sand grains found at depths of ∼2—5m beneath the substrate surface of Galway Bay may have originated from chemical weathering and aeolian transport during the late Tertiary Period and then been reworked in glacial and subsequent deltaic environments.
摘要:有大量证据表明,爱尔兰在第三纪经历了一段强烈的化学风化期。描述了爱尔兰西部这一环境的两次暴露,增加了爱尔兰其他地方这种类型风化的已知例子。石英砂颗粒的表面特征可用于区分它们在运输和沉积过程中所经过的环境。扫描电子显微镜拍摄的石英颗粒表面特征描述了从戈尔韦湾海底岩芯中提取的距今约10000年的沉积相。其中许多显示了冰川活动通过特征性断裂模式的作用,正如在爱尔兰的全新世沉积物中所预期的那样。然而,一些颗粒显示出的特征表明,它们的运输历史中存在先前的风成成分。这些颗粒与之前描述的石英颗粒以及从戈尔韦州Pollnahallia的沙坑中回收的第三纪风化产物进行了比较。相似之处表明,在戈尔韦湾底面以下2~5m深处发现的一些沙粒可能起源于第三纪晚期的化学风化和风成搬运,然后在冰川和随后的三角洲环境中被改造。
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引用次数: 0
PLEISTOCENE TO HOLOCENE STRATIGRAPHY OF AZOKH 1 CAVE, LESSER CAUCASUS 高加索小区AZOKH 1洞穴更新世至全新世地层
Q4 Earth and Planetary Sciences Pub Date : 2022-01-01 DOI: 10.3318/IJES.2010.28.75
J. Murray, P. Domínguez-Alonso, Y. Fernández-Jalvo, T. King, E. Lynch, P. Andrews, L. Yepiskoposyan, N. Moloney, I. Cáceres, E. Allué, L. Asryan, P. Ditchfield, D. M. Williams
Abstract:Azokh Cave is located in the southern Caucasus and contains a Pleistocene and Holocene sediment infill. The site is significant due to its geographic location at an important migratory route-way between the African subcontinent and Eurasia, and the recovery of Middle Pleistocene hominid remains in the sedimentary sequence during a previous phase of excavation. The stratigraphy of the largest of the cave's entrance passages, Azokh 1, is described in full in this paper for the first time. It is broadly divisible into nine units. Our investigations have shown that the stratigraphy splits between two spatially isolated sequences. The upper of these two sequences has proven to be fossiliferous and has yielded many types of mammal (macro and micro) fossils as well as evidence for human occupation. The base of this fossiliferous (upper) sequence is dated at around 300ka whilst the uppermost level appears to be largely confined to the Holocene (≈150 years BP).
摘要:Azokh洞位于高加索南部,具有更新世和全新世沉积物充填。该遗址位于非洲次大陆和欧亚大陆之间的重要迁徙路线上,并且在前一阶段的挖掘中在沉积序列中恢复了中更新世的原始人类遗骸,因此具有重要意义。这篇论文首次完整地描述了最大的洞穴入口通道Azokh 1的地层。它大致可分为九个单位。我们的研究表明,地层学在两个空间上孤立的层序之间分裂。这两个序列的上部已被证明是化石,并产生了许多类型的哺乳动物(宏观和微观)化石以及人类居住的证据。这个化石层序的底部(上部)的年代约为300ka,而最上层似乎主要局限于全新世(约150年BP)。
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引用次数: 15
The Irish Fossil Polyplacophora 爱尔兰多placophora化石
Q4 Earth and Planetary Sciences Pub Date : 2022-01-01 DOI: 10.3318/IJES.2007.25.1.27
J. Sigwart
Abstract:Three species of fossil polyplacophoran molluscs are known from Ireland. Two species were originally described in the nineteenth century: Helminthochiton griffithi Salter in M'Coy, 1846 and Pterochiton thomondiensis (Baily, 1859), and an articulated specimen representing a third indeterminate species, described here for the first time. Previous work on the evolutionary context of these species has relied on published illustrations and descriptions without examination of the type material. As chitons are considered rare in the fossil record, these specimens represent an interesting and important aspect of Irish palaeobiology.
摘要:在爱尔兰已知三种软体动物化石。19世纪最初描述了两个物种:1846年M'Coy的Helminthochiton griffithi Salter和1859年的Pterochiton thomondiensis,以及一个代表第三个不确定物种的关节标本,在这里首次描述。先前关于这些物种进化背景的工作依赖于已发表的插图和描述,而没有检查类型材料。由于石鳖在化石记录中被认为是罕见的,这些标本代表了爱尔兰古生物学的一个有趣而重要的方面。
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引用次数: 7
Using Tellus stream sediment geochemistry to fingerprint regional geology and mineralisation systems in Southeast Ireland 利用Tellus溪流沉积物地球化学对爱尔兰东南部区域地质和矿化系统进行指纹识别
Q4 Earth and Planetary Sciences Pub Date : 2022-01-01 DOI: 10.3318/IJES.2018.36.45
Benedikt M. Steiner
Abstract:Regional stream sediment geochemistry provides a useful tool for screening relatively large areas for anomalous metal concentrations. Large, open-source governmental datasets represent an affordable option for smaller companies to prioritise areas for follow-up. Equally, such datasets are useful in applied geochemical research. This study investigates recently released Tellus regional stream sediment analyses for Southeast Ireland, focusing on counties Wicklow, Wexford, and parts of Kildare, Carlow, Kilkenny and Waterford. The aim is to: i) apply trace element ratios and vectors to define and confirm key lithologies and types of mineralisation previously mapped in the study area, ii) provide a tool to reconstruct the geological setting at a 1:500k regional scale and iii) outline follow-up areas from a mineral exploration point of view. I demonstrate that governmental geochemical datasets can not only define anomalous areas per se, but also support the recognition of regional geological trends and the definition of a number of ore deposit styles. The Tellus dataset for Southeast Ireland, despite its low-density and regional nature, confirmed the regional geological setting albeit in limited detail. Geochemical vectors for Li-Cs-Ta (LCT) pegmatites in the Leinster Granite as well as Volcanogenic Massive Sulphide (VMS) mineralisation in the Copper Coast and Avoca areas, were established and support previous univariate anomaly detection studies. The workflow will be particularly beneficial in remote and poorly mapped areas where geochemical surveys can add additional value to support ongoing definition of stratigraphy, lithologies and anomalous metal abundances.
摘要:区域河流沉积物地球化学为筛选相对较大区域的异常金属浓度提供了有用的工具。大型开源政府数据集是小型公司优先考虑后续领域的一个负担得起的选择。同样,这些数据集在应用地球化学研究中也很有用。本研究调查了最近发布的爱尔兰东南部Tellus地区河流沉积物分析,重点是威克洛县、韦克斯福德县以及基尔代尔、卡洛、基尔肯尼和沃特福德的部分地区。其目的是:i)应用微量元素比例和矢量来定义和确认研究区域先前绘制的关键岩性和矿化类型,ii)提供一种在1:500k区域尺度上重建地质环境的工具,以及iii)从矿产勘探的角度概述后续区域。我证明,政府的地球化学数据集不仅可以定义异常区域本身,还可以支持对区域地质趋势的识别和对多种矿床类型的定义。尽管爱尔兰东南部的Tellus数据集具有低密度和区域性,但它证实了区域地质背景,尽管细节有限。建立了伦斯特花岗岩中Li-Cs-Ta(LCT)伟晶岩的地球化学矢量,以及铜海岸和Avoca地区的火山成因块状硫化物(VMS)矿化,并支持以前的单变量异常检测研究。该工作流程在偏远和地图绘制不佳的地区尤其有益,在这些地区,地球化学调查可以增加额外的价值,以支持正在进行的地层学、岩性和异常金属丰度的定义。
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引用次数: 9
期刊
Irish Journal of Earth Sciences
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