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Spahievo Bulgaria

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Journal Article
Journal: Economic Geology
Published: 01 August 2000
Economic Geology (2000) 95 (5): 1155–1164.
.... The Spahievo ore district, Bulgaria, is adjacent to the Oligocene Borovitsa caldera, one of the largest in Europe. Juxtaposition of porphyry mineralization, barren advanced argillic alteration, and low-sulfidation epithermal alteration and mineralization zones along the caldera margin provides an uncommon...
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Series: Geological Society, London, Special Publications
Published: 01 January 2002
DOI: 10.1144/GSL.SP.2002.204.01.06
EISBN: 9781862394520
... are more common in the southeastern sector; Pb–Zn(–Ag) breccia- and vein deposits in volcanic rocks, hydrothermal veins and fault- related breccias, the latter connected with metamorphic core complexes. The first group comprises deposits such as Skouries and Maronia in Greece and Spahievo in Bulgaria...
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Series: Geological Society, London, Special Publications
Published: 01 January 2002
DOI: 10.1144/GSL.SP.2002.204.01.09
EISBN: 9781862394520
.... 1997 ; Singer & Marchev 2000 ). Mining at Madjarovo ore district in Bulgaria is believed to have commenced during Thracian times, with most development beginning in the 1950s. More than 10 million tons of base metal ore have been mined; another 6.5 million tons of base metal reserves and low...
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Series: Geological Society, London, Special Publications
Published: 01 January 2014
DOI: 10.1144/SP402.7
EISBN: 9781862396784
...Abstract Abstract Precious metal epithermal, sedimentary-rock-hosted prospects constitute a new class of ore deposits recently described in the Tertiary Eastern Rhodopes of southeastern Bulgaria. The Stremtsi prospect investigated in this contribution is located in a distal location...
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Series: Society of Economic Geologists Guidebook Series
Published: 01 January 2001
DOI: 10.5382/GB.34
EISBN: 9781934969878
... ( Baska et al., 1980 ); and Spahievo, Bulgaria ( Velinov et al., 1972, 1990 ). This style of mineralization is most commonly preserved in Tertiary rocks, though it is recognized to have formed as far back as the Early Proterozoic in central Sweden (Enåsen). The old examples are commonly highly...
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