Results 1 to 10 of about 6,255 (170)

A Comparative Study on the Comminution Behavior of Diorite Rocks [PDF]

open access: yesHeliyon, 2021
In this article factors that affect the comminution behavior of heterogeneous diorite rocks obtained from two quarry locations in Botswana were investigated.
Gwiranai Danha   +2 more
exaly   +5 more sources

U-Pb age of titanite from diorit of Osnytsky Block (Volyn Megablock of Ukrainian Shield)

open access: yesГеологія і корисні копалини Світового океану, 2023
The Osnytsky block is a constituent part of the Osnytsky-Mikashevytsky volcano-plutonic belt. The leading place in the geological structure of the Osnytsky block is occupied by the rock association, which includes a number of plutonic formations from ...
VYSOTSKY O.B.   +3 more
doaj   +1 more source

Instability determination and construction monitoring analysis of shield excavation face in diorite-bearing strata

open access: yesYantu gongcheng xuebao, 2023
The stability of the excavation surface is directly related to that of the surrounding rock of tunnels and the influence level of disturbance deformation of strata, which is the key issue to the shield construction technology.
LIU Fengzhou 1, 2, XU Qianwei 3, ZHONG Jixin 2, HE Xiang 3, WANG Jing 1, LAI Shouxi 4
doaj   +1 more source

Petrology, geochemistry and tectonic setting of alkaline mafic rocks in the Jalal Abad area in the NW of Zarand (Kerman Province): Evidence for Paleo-Tethys rifting in the Central Iran [PDF]

open access: yesپترولوژی, 2018
The Jalal Abad region lies within the southern sector of Posht Badam block near to Jalal Abad, Najaf Abad iron deposits. In this region, several mafic intrusions and associated dyke and sills were intruded within the volcano-sedimentary unit of Rizu ...
Yusef Vesali   +4 more
doaj   +1 more source

Large Igneous Provinces (LIPs) and Anoxia Events in “The Boring Billion”

open access: yesGeophysical Monograph Series, Page 449-486., 2021

Exploring the links between Large Igneous Provinces and dramatic environmental impact

An emerging consensus suggests that Large Igneous Provinces (LIPs) and Silicic LIPs (SLIPs) are a significant driver of dramatic global environmental and biological changes, including mass extinctions.
Shuan‐Hong Zhang   +4 more
wiley  

+1 more source

An Experimental and Numerical Study of Diorite-Porphyrites With Different Weathered Degree in the Direct Shear Test

open access: yesFrontiers in Earth Science, 2020
There are many well-developed weathered diorite-porphyrites, except main rocks, in the Jurong pumped storage power station of Jiangsu Province, China. Due to different geological environments, diorite-porphyrites emerged by invading faults and can alter ...
Haotian Fan   +6 more
doaj   +1 more source

Rb–Sr dating and S–Sr–Nd isotopic constraints on the genesis of the Hehuashan Pb–Zn deposit in the Middle–Lower Yangtze River Metallogenic belt, China

open access: yesSolid Earth Sciences, 2021
The Hehuashan sediment-hosted Pb–Zn deposit is a large-scale (Pb + Zn>1 Mt) deposit hosted in the Tongling mining district of the Middle-Lower Yangtze River belt (MLYB).
Guangxian Liu   +4 more
doaj   +1 more source

Geology, petrology, geochemistry and geochronology of Tarik Darreh plutonic rocks, northeastern Iran

open access: yesJournal of Economic Geology, 2020
Introduction The investigated area in northeastern Iran that is known as the Tarik Darreh arsenopyrite-Au-W prospecting target is situated in the Kopeh Dagh zone (Fig. 1).
Jamal Ghavi   +4 more
doaj   +1 more source

The optimal use of crumb rubber in hot-mix asphalt by dry process: A laboratory investigation using Marshall mix design

open access: yesTransportation Engineering, 2022
This paper aims to use the Marshall method to design and evaluate crumb-rubber modified (CRM) and conventional dense-graded (DG) hot mix asphalt (HMA), as there were limited previous experimental investigations that compared their properties by varying ...
Eng Hie Tan   +2 more
doaj   +1 more source

Rock alteration at the post-Variscan nonconformity: implications for Carboniferous–Permian surface weathering versus burial diagenesis and paleoclimate evaluation [PDF]

open access: yesSolid Earth, 2021
A nonconformity refers to a hiatal surface located between metamorphic or igneous rocks and overlying sedimentary or volcanic rocks. These surfaces are key features with respect to understanding the relations among climate, lithosphere and tectonic ...
F. Liang   +6 more
doaj   +1 more source

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