Results 11 to 20 of about 1,453,523 (291)

Whole Rock, Mineral Chemistry during Skarn Mineralization-Case Study from Tongshan Cu-Mo Skarn Profile

open access: yesApplied Sciences, 2023
Studying the activation, migration and precipitation processes of ore-forming elements is essential for understanding the genesis and mechanisms of skarn deposits.
Ran Bi, Fangyue Wang, Wenqi Zhang
doaj   +1 more source

Legal Deposit Web Archives and the Digital Humanities: a Universe of Lost Opportunity? [PDF]

open access: yes, 2018
Legal deposit libraries have archived the web for over a decade. Several nations, supported by legal deposit regu-lations, have introduced comprehensive national domain web crawling, an essential part of the national library re-mit to collect, preserve ...
Berube, Linda   +2 more
core   +3 more sources

Recognizing the threshold magnetic anisotropy for inclination shallowing: Implications for correcting inclination errors of sedimentary rocks

open access: yesFrontiers in Earth Science, 2014
Post-depositional compaction is an integral part of sedimentary rock formation and thus has been reasonably deemed as a major culprit for the long-recognized inclination-shallowing problem in sedimentary rocks.
Yongxiang eLi   +3 more
doaj   +1 more source

Development of resource-saving technology when mining ore bodies by blocks under rock pressure [PDF]

open access: yesE3S Web of Conferences, 2020
The article aims to develop the resource-saving technology when mining steep ore bodies applying 250 mm-diameter boreholes to break ore into the compressed environment. This will reduce dilution of the mined ore mass in conditions of rock pressure around
Pysmenniy Serhii   +4 more
doaj   +1 more source

Institutional Structure of the Russian Financial Market: The Need for Regulatory Transformation [PDF]

open access: yesФинансовый журнал, 2022
The article analyzes the current state of the Russian financial market’s institutional structure. The main variants of activity combinations of its participants allowed by the law are described.
Oleg M. Skapenker
doaj   +1 more source

Estimating Open Access Mandate Effectiveness: The MELIBEA Score [PDF]

open access: yes, 2015
MELIBEA is a Spanish database that uses a composite formula with eight weighted conditions to estimate the effectiveness of Open Access mandates (registered in ROARMAP).
Boivin, Jade   +4 more
core   +4 more sources

Geology, Alteration, Mineralization, Geochemistry and Petrology of intrusive units in the Shah Soltan Ali prospect area (Southwest of Birjand, South Khorasan province)

open access: yesJournal of Economic Geology, 2017
Introduction The Shah Soltan Ali area is located 85 km southwest of Birjand in the South Khorasan province. This area is part of the Tertiary volcanic-plutonic rocks in the east of the Lut block. The Lut block is bounded to the east by the Nehbandan and
Samaneh Nadermezerji   +2 more
doaj   +1 more source

Determination of Trace Elements in Magnetite by Laser Ablation-Inductively Coupled Plasma-Mass Spectrometry Using Multiple External Standards without an Internal Standard Calibration

open access: yesYankuang ceshi, 2016
Laser Ablation-Inductively Coupled Plasma-Mass Spectrometry (LA-ICP-MS) is commonly used to analyze trace elements in magnetite, which can be divided into internal standard (IS) and no internal standard (NIS) methods according to calibration techniques ...
MENG Yu-miao   +4 more
doaj   +1 more source

lp Norm Smooth Inversion of Magnetic Anomaly Based on Improved Adaptive Differential Evolution

open access: yesApplied Sciences, 2021
Due to the approved applicability of differential evolution (DE) in geophysical problems, the algorithm has been widely concerned. The DE algorithms are mostly applied to solve the geophysical parametric estimation based on specific models, but they are ...
Wei Du, Lianzheng Cheng, Yuanfang Li
doaj   +1 more source

Research Progress on Sb Geochemistry and Sb Isotopes

open access: yesYankuang ceshi, 2016
Antimony (Sb) has been widely used in products such as fire retardants, glass, rubber, paint, ceramics and semiconductors. It is found throughout igneous rocks but can be enriched in sedimentary rocks such as abysmal clays, shales and clastic rocks.
MENG Yu-miao   +4 more
doaj   +1 more source

Home - About - Disclaimer - Privacy