Results 21 to 30 of about 13,754 (164)

Characteristics of Selected Physical and Mechanical Properties as well as Chemical Composition of Aggregates based on: Steel Slags, Porphyry and Diabase [PDF]

Archives of Civil Engineering, 2020
This paper presents the results of tests of selected physical and mechanical properties as well as the chemical composition of two types of natural aggregates: porphyry and diabase, as well as artificial aggregate based on steel slags.
Iwona Jonczy, Bartłomiej Grzesik, Michał Stawowiak, Anna Gerle   +3 more
doaj   +1 more source

Quantifying Hydrothermal Alteration: A Review of Methods

Geosciences, 2018
Hydrothermal alteration is proximal to many base and precious metal deposits, and its products can provide insights into the characteristics of hydrothermal systems.
Lucie Mathieu
doaj   +1 more source

The Leadville porphyry [PDF]

Science, 1883
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openaire   +3 more sources

Antik Çağ’da İnciller’in Güvenilirliği Meselesi/The Question of the Reliability of the Gospels in Antiquity

Oksident, 2019
The question of whether the traditional Gospels provide reliable historical information is discussed currently by scholars in light of various scientific methods. This matter, however, was also on the agenda among some intellectuals of antiquity.
Zafer Duygu
doaj   +1 more source

Isotopic Composition and Alteration Characteristics of Dacite Porphyry, and Their Prospecting Significance in the Dabaoshan Copper Deposit of Guangdong Province

Yankuang ceshi, 2020
BACKGROUND The main types of copper deposits are porphyry and skarn types. Dacite porphyry is a rock type commonly developed in the porphyry Cu-Mo-Au system.
ZHAO Chen-hui, WANG Cheng-hui, ZHAO Ru-yi, LIU Shan-bao, RAO Jiao-ping, LIU Wu-sheng, ZHANG Xiong, JIANG Jin-chang, LI Ting-jie   +8 more
doaj   +1 more source

Geophysical exploration and geological appraisal of the Siah Diq porphyry Cu–Au prospect: A recent discovery in the Chagai volcano magmatic arc, SW Pakistan

Open Geosciences, 2022
Discovery of the Siah Diq porphyry (Cu–Au) prospect in the foothill of Dam Koh volcano is a recent exploration success story of mineralization buried under a 46 m alluvium cover in an exploratory mature Chagai belt.
Khalil Yasir Shaheen, Wenyuan Li, Huang Jinku, Abbas Syed Ali, Jun Hong   +4 more
doaj   +1 more source

Constraints of magmatic oxidation state on mineralization in the Beiya alkali-rich porphyry gold deposit, western Yunnan, China

Solid Earth Sciences, 2017
The Beiya gold deposit is the biggest Cenozoic gold deposit in the Jinshajiang-Ailaoshan alkali-rich porphyry metallogenic belt within the Sanjiang region. Porphyry intrusions are widely distributed at the Beiya deposit. In this study, we investigate the
Xue-Quan Gao, Wen-Yan He, Xue Gao, Xin-Shang Bao, Zhen Yang   +4 more
doaj   +1 more source

Platinum-group elements (PGE) in the New Afton alkalic Cu-Au porphyry deposit, Canadian Cordillera, II: PGE distribution and models for the hydrothermal coprecipitation of Co-Ni-Pd-Pt in pyrite

Frontiers in Earth Science, 2023
The first part of this article can be found here: 10.3389/feart.2023.819129 (DOI). Occurrences of significant concentrations of platinum-group elements (PGE) in porphyry deposits have seen limited attention and the geochemical controls on their ...
Samuel J. Robb, Brandon M. Boucher, James E. Mungall, Jacob J. Hanley   +3 more
doaj   +1 more source

The content of copper and heavy metals in the multilayer soil mud from the Buchim lake under the Buchim mine's waste dump, Republic North Macedonia [PDF]

Tehnika, 2020
The intense mineral extraction in mining areas during the last several decades has produced a large amount of waste material and tailings, which release toxic elements to the environment.
Serafimovski Todor S., Tasev Goran K., Stafilov Trajce Z.   +2 more
doaj  

WP1 - Rhomb porphyry - data report [PDF]

, 2021
Samples of rhomb porphyry have been characterized with chemical analyses and different leaching experiments (column, container and standard leaching tests) to study their composition and leaching properties.
Børresen, Marion
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