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Alteration and paragenesis of the basalt-hosted Au deposits

Regional geologic map showing the distribution of Carlin-type Au deposits in the Dian-Qian-Gui area, China (modified from Su et al., 2018). Recent exploration discovered two primary Au deposits, including Jiadi and Damaidi, hosted in the Emeishan basalt in southwestern Guizhou Province ( Fig. 1 ), although a few small oxidized Au …

Distribution of basalt and location of the Daqiao …

Download scientific diagram | Distribution of basalt and location of the Daqiao conglomerate. Location of the cross-section is shown. from publication: A new interpretation of the sedimentary ...

Generation of Cenozoic intraplate basalts in the big mantle

According to their spatial distribution and deep seismic tomography, it is inferred that the recycled components are mostly from stagnant slabs in the mantle …

Iron solid-phase differentiation controls isotopic …

The study site is located on a small hill on northeastern Hainan Island in southern China (110° 38′ 52″ E, 19° 34′ 43″ N) (Fig. 1).This region is characterized by a tropical, moist, and monsoonal climate with a mean annual temperature of ∼ 24.4 °C and mean annual precipitation of ∼ 1696.5 mm (averaged between 1981 and 2010; all data …

Enrichment and speciation of chromium during basalt …

Geological map showing simplified distribution of the basalt in the Leizhou Peninsula, China and profiles sampling location (a); field photographs of NLC (b) and CLL (c) weathering profiles. ... The detailed profile and sample descriptions (including depth, horizon, and color) are given in Table 1. Table 1. Basic characteristics and main ...

Engineering geology of basaltic residual soil in Leiqiong, southern China

The studied samples were collected from typical residual soil (Q 4 el) from Shimaoling Formation (Q 2s) in Longmen Town (latitude 110° 02′ 03″ N, longitude 21° 41′ 53″ E) in China, at depths varying between 1.5 and 2.5 m (Fig. 1).Unweathered basalt at around 20.0 m was also obtained to examine the influence of weathering on chemical …

Distribution of the Tarim Flood Basalt Province and the …

Distribution of the Tarim Flood Basalt Province and the location of the study area Distribution of flood basalt after Chen et al. u2014e r Inset shows its geographical location in NW China.

BASALT refines binning from metagenomic data and …

BASALT consists of four modules: Automated Binning, Bin Selection, Refinement, and Gap Filling. First, assembled contigs are sorted into bins by several binning tools, each with multiple ...

Distribution of eruptive volcanic basalt in the South China …

The results from the above-mentioned methods have shown that the distribution of the eruptive volcanic basalt is mainly concentrated along the South China Sea's sea floor-spreading axis ...

Distribution map of the Cenozoic basalts in …

The U–Pb (249 to 1 Ma) and zircon fission track (ZFT) ages (65 to 1 Ma) suggest thermal annealing during later basalt transport, with < 1 to 203 Ma gaps between the U–Pb and ZFT ages.

Nickel isotope fractionation during intense weathering of basalt …

Given the wide distribution of mafic rocks (especially basalt) on the continental surface, basalt weathering is of global significance to the inputs of Ni to rivers. Studies on Ni isotopes have demonstrated differences in δ 60 Ni values between the upper continental crust (0.12 ± 0.15‰, Wu et al., 2022 ) and rivers (0.12–1.35‰, Cameron ...

Light δD apatites reveal deep origin water in North China …

Distribution of Mesozoic granitic rocks in the NCC and Liaodong Peninsula. a Simplified geological map of eastern China. The red front represents the present location of the western Pacific trench. Yellow star marks sampling location of basalt. b Distribution of Mesozoic granites in the Liaodong Peninsula, showing the sampling locations of ...

Vesicle distribution in basalt lava flow units in the …

The objective of this study was to construct vesicle distribution models of the basalt lava flow units, including conceptual geological models and thickness models, to understand the architecture ...

Chemical characterization, nano-particle mineralogy and …

Basalt dusts contain several agricultural essential elements (Ca, Mg, K, P, S and Fe) and beneficial elements (Na and Si) for crops. Basalt dusts are naturally obtainable (Gillman et al., 2002, Klein, 2002) and are environmentally sound as a soil amendment.Curiosity in the efficiency of crushed basalt to amend poor soils (especially …

Geochronology and geochemistry of Cenozoic basalts from …

The 40Ar–39Ar dating reveals three episodes of basaltic volcanism in eastern Guangdong of SE China since the late Eocene (i.e., 35.5, ~20 and 6.6 Ma). The …

Biomass distribution patterns of salt marshes: A detailed …

This study examines the spatial distribution of vegetation and its elevation relationship in central China's salt marsh wetlands, aiming to improve our understanding of biomass distribution. Using a combination of remote sensing modeling and field observations ( Berner et al., 2018 ; Byrd et al., 2018 ; Chen and Kirwan, 2022 ), we …

Vesicle distribution in basalt lava flow units in the Mesozoic …

The Mesozoic rift basins of northeast China are characterized by a significant proportion of basalt due to the progressive emplacement of basalt lava flows. The objective of this study was to construct vesicle distribution models of the basalt lava flow units, including conceptual geological models and thickness models, to understand …

Natural Basalt Gua Sha Massager Stone for Hot Cold …

Product Name: Natural Basalt Hot Cold Gua Sha Massager Stone Back Scraping Release SPA Therapy Feature: - No wax, no oil, original ecology. - Made of high-quality material, safe and eco-friendly, stable and durable. - Suitable for beauty salons, traditional Chinese medicine physiotherapy centers, hotels, homes, etc. >- Commonly …

Magnetic mineralogy of a weathered tropical basalt, Hainan …

The red soil (laterite) in subtropical to tropical southern and southeastern China provides important terrestrial archives of palaeoclimate and palaeoenvironment, e.g., Liu et al., 2012b, Liu et al., 2010. We present a detailed environmental magnetic investigation of a basalt weathering profile formed in a tropical climate.

CRYSTAL SIZE DISTRIBUTION OF PLAGIOCLASE IN BASALT …

Corpus ID: 249225681; CRYSTAL SIZE DISTRIBUTION OF PLAGIOCLASE IN BASALT FRAGMENTS FROM OCEANUS PROCELLARUM RECOVERED BY CHANG'E-5. @inproceedings{Webb2022CRYSTALSD, title={CRYSTAL SIZE DISTRIBUTION OF PLAGIOCLASE IN BASALT FRAGMENTS FROM OCEANUS PROCELLARUM …

Re–Os isotopic compositions of picrites from the Emeishan flood basalt

Picrites from the Lijiang area, in the western part of the Emeishan flood basalt province, are considered to be one of the most important indicators of the Emeishan mantle plume, and may represent initial mantle plume activity.This paper presents the first Re–Os isotope data for picrites from the province. Eighteen geochemically well …

Investigation of fiber length distribution on crack resistance

The length of basalt fiber produced by the company is usually set to a multiple of 3 mm. Hence, the frequency distribution of the skeleton gap axis length in the range of 0 ∼ 3 mm, 3 ∼ 6 mm and 6 ∼ 9 mm can be used to characterize the frequency distribution of basalt fibers with 3 mm, 6 mm and 9 mm, respectively.

Effect of basalt fiber distribution on the flexural–tensile rheological

Basalt fiber (BF), one of the four major high-tech fibers used in China, plays a reinforcing role and enhances the properties of composite materials [10]. These properties include natural compatibility, superior mechanical performance, stable chemical characteristics, and outstanding high temperature performance [11].

| (A) The distribution of the Emeishan basalts and cooper …

Cu concentration of the Emeishan basalts is high (i.e., an average of ∼170 ppm) and the copper mineralization grades range from about 1.0 to 4.0 wt% Cu ( Zhu et al., 2003;Wang et al., 2010).

Geochronological and geochemical characteristics of …

On the basis of detailed petrographic examination, a relatively fresh and representative sample was selected for K–Ar isotopic dating. Argon isotopic ratios and …

Growing magma chambers control the distribution of small …

Here, we present a case study of a small flood basalt field from eastern China to determine the role of the magma chamber in the formation and distribution of …

Pore size distribution curves of basalt residual soils

The basalt residual soil in Leizhou Peninsula is special regional soil. Comprehensive and systematic evaluation of engineering geological characteristics of the basalt residual soil can provide a ...

Late Cretaceous basalts in the eastern South China Block: …

Four basaltic rocks (Samples YX3-1, YX4-1, YX5-1, YX6-1 and YX7-1) were collected from the Youxian basin of the central SCB (Fig. 2 b).A set of zircon U-Pb ages of the Xinshi basalt in the western margin of the Youxian basin constrain the formation age to ∼ 80 Ma (Qin et al., 2020).These basaltic rocks show a broadly parallel conformity …

Optimization Mechanism of Mechanical Properties of Basalt …

As an emerging green industrial material, basalt fiber-epoxy composites are widely used in many fields such as aviation, ships and automobiles [].Reinforced phase basalt fibres with the advantages of green and pollution-free, high mechanical strength, good temperature resistance and chemical stability [2,3,4].Because of the good …

Distribution of igneous rocks in China revealed by …

We discussed the distribution of igneous rocks in China. ... A combination color contour and shaded relief map of reduced-to-pole magnetic anomaly data from the detailed compilation area over the Chinese continent and part of the China Sea. ... Basalt: 38,790: 0–14,146: 2570: 0–93,900: