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List of Reviewers for 74 74 评审员名单
IF 1.4 4区 地球科学 Q2 Earth and Planetary Sciences Pub Date : 2024-01-01 DOI: 10.1111/rge.12326
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引用次数: 0
Granitic-melt and carbonic-fluid inclusions in diopside megacrysts from ankaramitic basalt dikes at Kamisano, Yamanashi prefecture, northeastern Japan 日本东北部山梨县上佐野安卡拉米特玄武岩尖晶石中的透辉石巨晶中的花岗岩熔体和碳流包裹体
IF 1.4 4区 地球科学 Q2 Earth and Planetary Sciences Pub Date : 2023-12-13 DOI: 10.1111/rge.12324
Takashi Amagai, Masanori Kurosawa
Large phenocrysts, known as megacrysts, are focal points for research due to their ability to encapsulate large inclusions suitable for precise chemical analyses. Ankaramite, a distinctive type of undifferentiated volcanic rock, stands out due to its high MgO and CaO contents and the presence of abundant Ca-rich clinopyroxene (diopside) and less common Mg-rich olivine phenocrysts. In this study, granitic melt inclusions together with carbonic fluid inclusions were identified within diopside megacrysts of ankaramitic basalt dikes in the Kamisano region, Yamanashi Prefecture, Japan. The identified melt inclusions are completely crystallized and primarily composed of quartz, alkali feldspar, and plagioclase, with smaller amounts of pargasite, augite, apatite, and sulfides. Small amounts of residual glass were also occasionally observed in the inclusions. The average chemical composition of these granitic melts within the inclusions corresponds to that of calc-alkaline granodiorite and the melts are characterized by low water content (0.38 wt%) and high concentrations of sulfur (7000 ppm), copper, and iron. The findings suggested that the composition of granitic melt inclusions may provide insights into the characteristics of near-surface hydrothermal metal ore deposits. The diopside megacrysts also contain CO2H2O fluid inclusions, which are completely crystallized and mainly comprised of calcite and chlorite, along with small amounts of quartz. The crystals are interpreted to have formed by the reaction of original CO2H2O fluids and host diopside. The diopside megacrysts are estimated to have started crystallization from tholeiitic basalt at a depth of ~30 km in the lower crust, and trapped fluids and granitic melts as inclusions at a shallower depth when the tholeiitic magma ascended.
大型斑晶,即巨晶,是研究的焦点,因为它们能够包裹适合精确化学分析的大型包裹体。安卡拉石是一种独特的未分化火山岩,其MgO和CaO含量高,富钙斜辉石(透辉石)丰富,富镁橄榄石斑晶少见。在日本山山县神野地区的安卡拉岩玄武岩脉中,发现了花岗质熔体包裹体和碳流体包裹体。熔融包裹体完全结晶,主要由石英、碱长石、斜长石组成,含少量的闪长石、辉长石、磷灰石和硫化物。在夹杂物中偶尔也观察到少量的残余玻璃。这些包裹体中的花岗岩熔体的平均化学成分与钙碱性花岗岩闪长岩相对应,熔体的特征是低含水量(0.38 wt%)和高浓度的硫(7000 ppm)、铜和铁。这些发现表明,花岗岩熔体包裹体的组成可能为了解近地表热液金属矿床的特征提供线索。透辉石巨晶中还含有CO2 - H2O流体包裹体,该包裹体结晶完全,主要由方解石和绿泥石组成,并含有少量石英。这些晶体是由原始的CO2 - H2O流体和寄主透辉石反应形成的。推测透辉石巨型晶体在地壳下部~ 30km深度的拉斑玄武岩中开始结晶,并在拉斑岩浆上升时在较浅的深度以包裹体形式捕获流体和花岗岩熔体。
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引用次数: 0
Spatial and temporal distribution of hydrocarbon production on the UK continental shelf 英国大陆架油气生产的时空分布
IF 1.4 4区 地球科学 Q2 Earth and Planetary Sciences Pub Date : 2023-12-05 DOI: 10.1111/rge.12323
Ukari Osah, John Howell
Hydrocarbon production from oil and gas fields is controlled by a variety of interconnected factors with a hierarchy of significance that is, for the most part, difficult to untangle. This article documents and investigates the spatial and temporal distribution of key hydrocarbon field parameters on the UK Continental Shelf. Data have been compiled from publicly available sources for 424 fields. Variables are considered as “descriptive parameters,” “control parameters” and “outcomes”. Descriptive parameters are metadata such as field name, location, etc. Control Parameters include depositional environment, present depth of burial, porosity, permeability, reservoir formation pressure, reservoir temperature, average net-to-gross, number of fault populations, hydrocarbon API, field area, bulk rock volume, well density, number of wells (production and injection), well spacing, gas oil ratio, reservoir thickness, fluid saturation, compartmentalization (quantitated by number of observable non-communicating fault compartments), structural complexity (scaled from 0 to 5), field production strategy, trap type and stratigraphic heterogeneity. Outcomes are used to assess field performance and include final recovery factor (estimated), maximum production rate, and cumulative monthly production. Analysis of the database illustrates a number of empirical observations regarding hydrocarbon production on the UKCS. The Jurassic plays have been the most successful in the region in terms of total volumes produced while the Permian reservoirs of the SNS account for the majority of the gas. Most of the UKCS reservoirs record top depths between 2000 and 4500 m with good reservoir quality. The best reservoir quality is observed in reservoirs that were deposited within deep marine systems. The largest hydrocarbon reserves are found in the Northern North Sea basin in these deep marine (as well as paralic and shallow marine) reservoirs. Using the data from this article and affiliated data, potential exists for extracting insight beyond spatio-temporal distributions.
油气田的油气产量受多种相互关联的因素控制,这些因素具有重要的层次结构,在很大程度上难以理清。本文记录并研究了英国大陆架主要油气田参数的时空分布。数据是从424个领域的公开来源汇编而来的。变量被认为是“描述性参数”、“控制参数”和“结果”。描述性参数是元数据,如字段名、位置等。控制参数包括沉积环境、当前埋藏深度、孔隙度、渗透率、储层压力、储层温度、平均净总比、断层数量、油气API、油田面积、岩石体积、井密度、井数(生产和注入)、井距、油气比、储层厚度、流体饱和度、分区化(通过观察到的非连通断层分区数量来量化)、构造复杂性(从0到5)、油田生产策略、圈闭类型和地层非均质性。结果用于评估油田性能,包括最终采收率(估计)、最大产量和累计月产量。对该数据库的分析说明了一些关于UKCS油气生产的经验观察结果。就总产量而言,该地区侏罗纪气藏最为成功,而SNS的二叠纪储层占了大部分天然气。大多数英国大陆架储层的顶深在2000 ~ 4500米之间,储层质量良好。在深海体系中沉积的储层质量最好。最大的油气储量位于北海盆地北部的这些深海(以及海陆和浅海)储层中。利用本文中的数据和相关数据,有可能提取超越时空分布的洞察力。
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引用次数: 0
Trace element composition of fluorite from the Chumathang pegmatite deposit, eastern Ladakh, India 印度拉达克东部楚马唐伟晶岩矿床萤石微量元素组成
IF 1.4 4区 地球科学 Q2 Earth and Planetary Sciences Pub Date : 2023-11-28 DOI: 10.1111/rge.12322
Stanzin Namga, Pankaj K. Srivastava, Rajni Magotra, Pawan Singh
The fluorite deposit of the Chumathang area of south-eastern Ladakh, India, is hosted in pegmatite which cross-cuts the Paleogene Chumathang granite. The rare earth element and yttrium (REE-Y) and the trace element's composition of different colored (green, purple, and white) fluorite were investigated to understand its genesis. The green fluorite core is surrounded by purple fluorite, indicating that green fluorite crystallized earlier than the purple one. The white fluorite is mineralized with green fluorite, it does not exhibit any zoning like the other fluorite. The REE pattern of green and white fluorites is similar to those in the host pegmatite and associated Chumathang granite. ƩREE content in fluorite increases from green, white to purple. Fluorites in the study area are characterized by negative Ce suggesting partial reducing conditions during its formation. The Y/Y*, Ce/Ce*, and Eu/Eu* ratios show that fluorite records the compositional evolution of the hydrothermal solutions that transported the trace and REE from the host granite during the fluid–wall rocks interactions. The fluorite exhibits a positive Y anomaly which is suggestive of strong Y-Ho fractionation in the fluid system. Chumathang fluorite show significant degrees of differentiation between terbium (Tb) and lanthanum (La) in all the purple, green, and white colored fluorite. The Tb/La and Tb/Ca ratios of the fluorites confirm the role of pegmatitic melt and hydrothermal fluid in the genesis of Chumathang fluorite.
印度拉达克东南部楚马唐地区的萤石矿床赋存于与古近系楚马唐花岗岩交叉的伟晶岩中。研究了不同颜色(绿、紫、白)萤石的稀土元素、钇(REE-Y)及微量元素组成,了解其成因。绿色萤石芯被紫色萤石包围,说明绿色萤石比紫色萤石更早结晶。白色萤石与绿色萤石矿化,不像其他萤石一样表现出任何分带。绿、白萤石的稀土元素模式与寄主伟晶岩及其伴生的楚马塘花岗岩相似。ƩREE萤石的含量由绿色、白色到紫色逐渐增加。研究区萤石具有负Ce特征,表明其形成过程中存在部分还原条件。Y/Y*、Ce/Ce*和Eu/Eu*比值表明,萤石记录了流体-围岩相互作用过程中从寄主花岗岩输送微量元素和稀土元素的热液组分演化过程。萤石呈正Y异常,提示流体体系中存在强Y- ho分馏作用。楚马唐萤石在所有紫色、绿色和白色萤石中都表现出明显的铽(Tb)和镧(La)分化。萤石的Tb/La和Tb/Ca比值证实了伟晶岩熔体和热液在楚马塘萤石成因中的作用。
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引用次数: 0
List of Reviewers for 73 73的审稿人列表
IF 1.4 4区 地球科学 Q2 Earth and Planetary Sciences Pub Date : 2023-01-01 DOI: 10.1111/rge.12306
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引用次数: 0
Environmental risk assessment of the contamination of river water and sediments from the Bor mining area, East Serbia―Secondary Cu enrichment at the reservoir site 东塞尔维亚博尔矿区河水和沉积物污染的环境风险评价——水库遗址的二次Cu富集
IF 1.4 4区 地球科学 Q2 Earth and Planetary Sciences Pub Date : 2023-01-01 DOI: 10.1111/rge.12314
Olaotse Osenyeng, D. Ishiyama, Stefan Đorđievski, D. Adamović, Y. Ogawa
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引用次数: 0
Assimilation and extensive metasomatism of agpaitic rocks from the transitional layered kakortokite, Ilímaussaq Intrusion, South Greenland 南格陵兰岛Ilímaussaq侵入区过渡性层状kakortokite中绿质岩的同化和广泛交代作用
4区 地球科学 Q2 Earth and Planetary Sciences Pub Date : 2023-01-01 DOI: 10.1111/rge.12320
Hans Kristian Schønwandt, Gregory B. Barnes, Thomas Ulrich
Abstract The peralkaline Ilímaussaq Intrusion of the Gardar Province in South Greenland consists of several intrusive phases that have been related to different magmatic pulses and igneous cumulate processes. The lowermost exposed part of the intrusion is kakortokite, a eudialyte‐nepheline syenite, with distinctive sub‐horizontal layering which passes upwards into lujavrite, a fine‐grained melanocratic eudialyte‐nepheline syenite. Along the contact between kakortokite and lujavrite lies a transitional layered kakortokite, which has been defined previously based on textural and mineralogical criteria. However, published literature presents conflicting descriptions of this sequence in terms of thickness, layering, contacts, and mode of origin. Our own and previous field and petrographic investigations suggest that parts of the eudialyte‐rich zones in the transitional layered kakortokite comprise metasomatized and partially assimilated naujaite autoliths, a sodalite‐rich eudialyte nepheline syenite, detached probably from the roof of the intrusion. Here, we focus on the nature of the transitional layered kakortokite and conclude, in contrast to the conventional model, that it was formed by metasomatic transformation and assimilation of naujaite autoliths. We propose that the breakdown and replacement of sodalite locally increased chlorine and sodium concentrations, which may have catalyzed the precipitation of eudialyte. In detail, we suggest that the uppermost four eudialyte‐rich horizons were strongly influenced by metasomatic processes caused by mineral‐melt reaction, and were not simply the result of conventional igneous magmatic cumulate formation, as has been inferred for the underlying kakortokite layered units. Recognition of a significant metasomatic process has important bearing on the distribution of minerals with specific elements, like REE in eudialyte, both from a petrological and an economic perspective.
南格陵兰加尔达省的过碱性Ilímaussaq侵入岩由多个侵入期组成,这些侵入期与不同的岩浆脉冲和火成岩堆积作用有关。侵入体最下部的暴露部分为kakortokite,这是一种双透光石-霞石正长岩,具有独特的亚水平层状,向上进入一种细粒黑晶双透光石-霞石正长岩。在kakortokite和绿黄铁矿之间的接触处存在过渡性层状kakortokite,这是先前根据结构和矿物学标准定义的。然而,已发表的文献在厚度、分层、接触和起源模式方面对这一序列提出了相互矛盾的描述。我们自己和之前的野外和岩石学研究表明,过渡性层状kakortokite中部分富钠析岩带由交代和部分同化的钠辉石自长岩组成,这是一种富钠析岩的榴辉石正长岩,可能与侵入体顶部分离。本文对过渡性层状岩的性质进行了研究,并与传统模式不同,认为其是由钠辉石自岩的交代转化和同化作用形成的。我们认为钠石的分解和替换局部增加了氯和钠的浓度,这可能催化了析液的沉淀。详细地说,我们认为最上面的四个富含双溶物的层位受到矿物熔融反应引起的交代过程的强烈影响,而不仅仅是传统的火成岩岩浆堆积形成的结果,正如对下伏的kakortokite层状单元所推断的那样。从岩石学和经济学的角度来看,认识一个重要的交代过程对具有特定元素的矿物的分布具有重要的意义,如在透析液中REE。
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引用次数: 0
The formation of schwertmannite colloids and natural remediation of toxic elements from Shojin River, Hokkaido, Japan 日本北海道朔津河中有毒元素的天然修复及施魏特曼矿胶体的形成
IF 1.4 4区 地球科学 Q2 Earth and Planetary Sciences Pub Date : 2023-01-01 DOI: 10.1111/rge.12315
Frances Chikanda, Sereyroith Tum, Tatsuya Matsui, S. Norota, T. Otake, Tsutomu Sato
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引用次数: 0
Geochronology, magma source, and geochemistry of igneous rocks in the northern Taebaeksan metallogenic region, South Korea 韩国太白山成矿区北部火成岩年代学、岩浆源和地球化学
IF 1.4 4区 地球科学 Q2 Earth and Planetary Sciences Pub Date : 2023-01-01 DOI: 10.1111/rge.12312
Il-Hwan Oh, C. Heo, Sang‐Gun No, Seong-Jun Cho
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引用次数: 0
Geological and hypogene mineralization characteristics of the hematite‐rich Pelusa IOCG prospect, Antofagasta Region, Northern Chile 智利北部Antofagasta地区富赤铁矿Pelusa IOCG远景区地质及深部成矿特征
IF 1.4 4区 地球科学 Q2 Earth and Planetary Sciences Pub Date : 2023-01-01 DOI: 10.1111/rge.12310
Nicolás Carvajal, S. Kojima, A. Vallejo, Freddy Ildefonso
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引用次数: 0
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Resource Geology
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