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Ore genesis of the Wusihe carbonate-hosted Zn-Pb …

2018-1-6 · The Wusihe carbonate-hosted Zn-Pb deposit (3.7 Mt. Zn + Pb at a grade of 8.6% Zn and 2.0% Pb) is the largest deposit in the Dadu River Valley district of the Sichuan-Yunnan-Guizhou metallogenic province of southwest China. Three types of orebodies occur: (1) stratiform, banded and lamellar, within dolomite of the Neoproterozoic Dengying Formation; (2) vein type; and (3) breccia …

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:100085. .,,,19765。. 1998、2000、。. 2005University of Central Florida 。. 2009 " ...

Numerical simulation and analysis of fracture etching ...

2021-1-16 · Boundary conditions: The entrance boundary: When y = ± 0.5W f, -k μ ∂ P ∂ y = U 0 and C f = C 0 · f(x).. The exit boundary: When y = ±0.5 W, P = P 0 and ∂ C f ∂ y = 0.. Closed boundary: When × = 0 and L,-n · U = 0 and -n · (-φ D e · ∇ C f + U C f) = 0. 3. Controling regimes. When it comes to acid fracturing in dolomite reservoirs, there is a classic theory of acid-rock ...

CP

2021-8-3 · Received: 25 Nov 2020 – Discussion started: 21 Dec 2020 – Revised: 20 May 2021 – Accepted: 25 Jun 2021 – Published: 03 Aug 2021 Abstract The Early Cretaceous is characterized by warm background temperatures (i.e., greenhouse climate) and carbon cycle perturbations that are often marked by ocean anoxic events (OAEs) and associated shifts ...

Selective Catalytic Reduction of NO With NH3 over High ...

2020-4-28 · ABSTRACT In order to find efficient catalysts for low-temperature selective catalytic reduction with ammonia (NH3-SCR), several MnO2 with different crystal structure have been supported on high-purity palygorskite (Pal) by a hydrothermal method. The effect of MnO2 crystal structures on the NH3-SCR performance of the catalysts was investigated.

Effects of dicyandiamide and dolomite application on N2O ...

2015-12-1 · Shaaban M, Peng Q, HR, Wu Y, Lin S, Zhao J (2015) Dolomite application to acidic soils: a promising option for mitigating N 2 O emissions. Environ Sci Pollut Res. doi: 10.1007/s11356-015-5238-4 Simek M, Cooper JE (2002) The influence of soil pH on denitrification: progress towards the understanding of this interaction over the last 50 years.

Volume 49 Issue 4 | Geology | GeoScienceWorld

2020-11-20 · Read Volume 49 Issue 4 of Geology. COVER: Partially melted pelitic (garnet-sillimanite) gneisses with alternating garnet-rich, garnet-poor, and mafic granulite layers at Rundvågshetta, East Antarctica. The garnet occasionally contains sapphirine + quartz assemblage as evidence of ultrahigh-temperature metamorphism.

Structural and Compositional Variations in Some Natural ...

2020-9-5 · Dolomite concentrates from sedimentary rocks ranging in age from Eocene to Ordovician have been examined by powder and single-crystal X-ray methods. They not infrequently contain about 5 mol per cent excess, as determined by a powder X-ray method, and have weakened order reflections relative to those of dolomite of 1: 1 molar composition ...

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2021-3-18 ·  ( 2021-08-07 ) ,,1974,,(),,。2011,( 2016 )。 2018,2019 …

Desulfurization of fuels with half-calcined dolomite ...

2020-12-1 · Article Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days. Citations are the number of other articles citing this article, calculated by Crossref and updated daily.

Interpretation: Vol 8, No 4

The November issue of Interpretation features seven special sections: (1) seismic interpretation of fractures in deep subsurface, (2) Europe — diverse subsurface characterization challenges, (3) interesting features (aka funny-looking things) seen on seismic data, (4) integrated geophysical imaging, (5) Colombia, (6) shallow urban underground cavity survey technology and environmental ...

CP

In November 2009 stalagmite SN17 (Fig. 3), 320 mm in length, was collected 200 m behind the cave entrance where the bedrock is dolomite. X-ray diffraction (XRD) analyses suggest that the stalagmite is composed of aragonite, except for the bottom section …

Journal of Materials in Civil Engineering | Vol 33, No 11

Journal of Materials in Civil Engineering. November 2021 | Volume 33, Issue 11. ISSN (print): 0899-1561 | ISSN (online): 1943-5533. Available Issues. Current Issue All Issues. Subscribe. Volume 33 Volume 32 Volume 31 Volume 30 Volume 29 Volume 28 Volume 27 Volume 26 Volume 25 Volume 24 Volume 23 Volume 22 Volume 21 Volume 20 Volume 19 Volume 18 ...

The Stone Forest, near Kunming — An Insider''s Guide

2021-8-10 · Chinese: Shílín /shrr-lin/ ''Stone Forest''. Area : 400 square Kilometers (150 sq. mi.) Recommended time for a visit : 3–4 hours. Open: 8:30am to 6:00pm. Popular activities: see the vast stone forest with waterfalls, lakes, and karst caves; discover the life of the Sani (Yi) people. Must-sees: The Greater and Lesser Stone Forests ...

Dolomite rejection from crushed pebble phosphate by ...

2019-11-1 · The pebble phosphate from mining operations (top size 10 mm) was roll crushed to minus 1 mm and subjected to attrition scrubbing under different conditions of scrubbing time, pH, temperature and rpm. The scrubbed products were deslimed at 53 µm. The coarse and fine fractions were analyzed to determine the content of MgO.

Origin of the penecontemporaneous sucrosic dolomite in …

2020-12-1 · The sucrosic dolomite with occasional cloudy core and clear rim has bright cathodoluminescence, high inclusions temperature, significant negative skewness carbon and oxygen isotopic compositions, and rare-earth element (REE) pattern similar to seawater, indicating it experienced two periods of dolomitization, evaporative concentration reflux ...

Terahertz Lens Fabricated by Natural Dolomite

We fabricate a kind of biconvex lens from the natural dolomite cluster. The lens works well at 0.1 THz based on the relatively high refractive index and low absorption coefficients. Compared with the lens fabricated by a dolomite stone, such a lens can focus dispersive terahertz beam efficiently in terahertz imaging systems, which indicates ...

Multi-step continuous-flow synthesis

2017-1-20 · Multi-step continuous-flow synthesis J. Britton and C. L. Raston, Chem. Soc. Rev., 2017, 46, 1250 DOI: 10.1039/C6CS00830E This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. You can use material from this article in …