scholarly journals Mineralogical investigation of zinc and copper ores from the Blue Hill area in Maine, U.S.A., for Blackhawk Mining Limited

1963 ◽  
Author(s):  
W Petruk
Keyword(s):  
Hill Area ◽  
Mineralogical Investigation ◽  
Copper Ores

scholarly journals Lidar-Based Morphometry of Conical Hills in Temperate Karst Areas in Slovenia

2021 ◽  
Vol 13 (14) ◽  
pp. 2668
Author(s):  
Tamás Telbisz
Keyword(s):  
Empirical Distribution ◽  
Inverse Gaussian ◽  
Digital Terrain ◽  
Terrain Models ◽  
Starting Point ◽  
Significant Difference ◽  
Karst Areas ◽  
Hill Area ◽  
The Hill ◽  
Comprehensive Study

Conical hills, or residual hills, are frequently mentioned landforms in the context of humid tropical karsts as they are dominant surface elements there. Residual hills are also present in temperate karsts, but generally in a less remarkable way. These landforms have not been thoroughly addressed in the literature to date, therefore the present article is the first attempt to morphometrically characterize temperate zone residual karst hills. We use the methods already developed for doline morphometry, and we apply them to the “inverse” topography using LiDAR-based digital terrain models (DTMs) of three Slovenian sample areas. The characteristics of hills and depressions are analysed in parallel, taking into account the rank of the forms. A common feature of hills and dolines is that, for both types, the empirical distribution of planform areas has a strongly positive skew. After logarithmic transformation, these distributions can be approximated by Inverse Gaussian, Normal, and Weibull distributions. Along with the rank, the planform area and vertical extent of the hills and dolines increase similarly. High circularity is characteristic only of the first-rank forms for both dolines and hills. For the sample areas, the the hill area ratios and the doline area ratios have similar values, but the total extent of the hills is slightly larger in each case. A difference between dolines and hills is that the shapes of hills are more similar to one another than those of dolines. The reason for this is that the larger, closed depressions are created by lateral coalescence, while the hills are residual forms carved from large blocks. Another significant difference is that the density of dolines is much higher than that of hills. This article is intended as a methodological starting point for a new topic, aiming at the comprehensive study of residual karst hills across different climatic areas.

Natural radioactivity of thermal springs and related precipitates in Gellért Hill area, Buda Thermal Karst, Hungary

2019 ◽  
Vol 201 ◽  
pp. 32-42 ◽  
Author(s):  
Petra Kovács-Bodor ◽  
Katalin Csondor ◽  
Anita Erőss ◽  
Dénes Szieberth ◽  
Ágnes Freiler-Nagy ◽  
...  
Keyword(s):  
Natural Radioactivity ◽  
Thermal Springs ◽  
Hill Area ◽  
Buda Thermal Karst

Silver catalyzed bioleaching of low-grade copper ores. Part III: Column reactors

2007 ◽  
Vol 88 (1-4) ◽  
pp. 35-51 ◽  
Author(s):  
J.A. Muñoz ◽  
D.B. Dreisinger ◽  
W.C. Cooper ◽  
S.K. Young
Keyword(s):  
Low Grade ◽  
Copper Ores

Formation conditions of high-grade tin-copper ores in the Churpun’ya deposit (Yakutia)

2007 ◽  
Vol 416 (1) ◽  
pp. 987-990
Author(s):  
A. V. Volkov ◽  
V. Yu. Prokof’ev ◽  
A. A. Sidorov
Keyword(s):  
High Grade ◽  
Formation Conditions ◽  
Copper Ores
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