Critical mineral resources of the United States—Economic and environmental geology and prospects for future supply

Schulz, Klaus J.; DeYoung, John H.; Seal, Robert R.; Bradley, Dwight C.

doi:10.3133/pp1802

Cited by 229 publications

(47 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…11 and 13) because the exposed rocks of the Hassan Bag contain calk-alkaline basalt rocks (Ali et al, 2012). In general, the average concentration of Co in the study area is 2.4 times higher than the average concentration of Co in the igneous and metamorphic rocks such as dunite and serpentinite (Schulz, 2018). The concentration of Cu shows nearly the same trends as observed for the concentration of Co, except in sample number 5, which showed a significantly higher concentration (221 mg/kg).…”

Section: Discussionmentioning

confidence: 85%

Reconnaissance Stream Sediments Survey in the Sidakan Vicinity, Iraqi Kurdistan Region

et al. 2020

View full text Add to dashboard Cite

A stream survey was conducted in the Sidakan vicinity in the northeastern part of the Iraqi Kurdistan Region, which covered the catchment area of the main stream. The covered area is about 450 km2. The exposed rocks in the study area are mainly igneous with subordinate sedimentary and metamorphic rocks. The catchment area was divided into 14 sub-basins using Global Mapper software. The junction point of the valleys at the end of each sub-basin was sampled. From each junction point, 2 stream sediments were collected. The samples were sieved using the wet method into 2 mm fractions, before the fractions were subjected to x-ray fluorescence (XRF) and x-ray diffraction (XRD) analysis. The results obtained from both tests were used to calculate the concentrations of 9 elements (Cr, Ni, Co, Cu, U, Ag, V, Zn, and Cd). The element concentrations are presented in 9 concentration maps after normalizing the concentration values. Some anomalous results were found. The average concentrations of Ag and Cd were nearly 120 and 266 times higher than the background concentrations (6 mg/kg and 16 mg/ kg, respectively). The acquired data also showed interesting average concentrations for the elements Co, Cr, Ni, and U (280 mg/kg, 999 mg/kg, 375 mg/kg, and 12 mg/kg, respectively). All of these anomalous concentrations are discussed and possible reasons for their existence are given.

show abstract

Section: Discussionmentioning

confidence: 85%

Reconnaissance Stream Sediments Survey in the Sidakan Vicinity, Iraqi Kurdistan Region

et al. 2020

View full text Add to dashboard Cite

show abstract

“…The country is working on securing supply and decreasing dependency from imports, especially from China. Based on the U.S. President's Executive Order 13817 (The White House, 2017), the U.S. Geological Survey (USGS) conducted its first criticality assessment in decades (Schulz, DeYoung, Seal, & Bradley, 2017) and, furthermore, investigated the supply risk to the United States (Fortier et al, 2018). The U.S. Department of Commerce (2019) released the "Federal Strategy to Ensure Secure and Reliable Supplies of Critical Minerals" in June 2019.…”

Section: The German Strategy In the Light Of Global Developmentsmentioning

confidence: 99%

The Revised German Raw Materials Strategy in the Light of Global Political and Market Developments

Schmid

2021

Review of Policy Research

View full text Add to dashboard Cite

Raw material markets have proven to be challenging in recent years. The so-called critical raw materials (CRMs), which are required for green technology, have particularly high environmental and supply risks. The revised German raw materials strategy attempts to address challenges of production and supply of CRMs and other mineral-based raw materials. This contribution analyzes the motivation, measures, goals, and challenges of the German raw materials strategy in the light of global economic and political developments, applying the qualitative method GABEK®. Results show that the revised strategy is more ambitious and reaches farther than the initial strategy of 2010. Challenges that remain include the lack of willingness of the German industry to engage in mine production and the more pro-active political approaches demonstrated elsewhere. As all major economic powerhouses outside of Europe pursue a hands-on approach, it remains questionable if the revised German raw materials strategy will fundamentally be able to sustainably secure raw material supply for the German industry.

show abstract

“…(ⅱ) 花岗伟晶岩型钽铌矿床. 花岗伟晶岩型钽矿床是重要的钽资源类型, 主要分布在加拿大、俄罗斯、巴西、澳大利亚、中非和南非, 世界钽资源主要开采于加拿大Tanco和澳大利亚Greenbush, Wodgina等花岗伟晶岩中 [28] . 富钽伟晶岩主要产自于LCT型花岗伟晶岩, 成矿母岩体主要为黑云母花岗岩及二云母花岗岩, 偶尔见有花岗闪长岩.…”

Section: 主要为锂云母、绿柱石、铌铁矿-钽铁矿、细晶石、unclassified

A review of niobium and tantalum metallogenic regularity in China

Li¹,

Denghong²,

Li³

2019

Chin. Sci. Bull.

View full text Add to dashboard Cite

Critical mineral resources of the United States—Economic and environmental geology and prospects for future supply

Cited by 229 publications

References 0 publications

Reconnaissance Stream Sediments Survey in the Sidakan Vicinity, Iraqi Kurdistan Region

Reconnaissance Stream Sediments Survey in the Sidakan Vicinity, Iraqi Kurdistan Region

The Revised German Raw Materials Strategy in the Light of Global Political and Market Developments

A review of niobium and tantalum metallogenic regularity in China

Contact Info

Product

Resources

About