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Low-temperature hydrothermal alteration of trachybasalt

2009-12-1  The conversion of volcanic glass to secondary alteration products is one of the most common mineralogical transformations during low-temperature hydrothermal alteration of submarine basalts. To better understand the mechanism and kinetics of this transformation, porphyritic and formerly glassy trachybasalt, recovered from Conical Seamount, Papua New

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LOW-TEMPERATURE HYDROTHERMAL ALTERATION OF

Low-temperature interaction of trachybasalt with hydrothermal fluids at this submerged volcano occurred in response to the formation of submarine epithermal-style gold mineralization. Alteration of the coherent volcanic rocks is heterogeneous with pronounced differences in alteration intensity occurring between igneous minerals and the ...

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Low-temperature hydrothermal alteration of trachybasalt

Low-temperature hydrothermal alteration of trachybasalt at Conical Seamount, Papua New Guinea: Formation of smectite and metastable precursor phases December 2009 Clays and Clay Minerals 57(6):725-741

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Low-temperature hydrothermal alteration of trachybasalt

2009-12-1  Low-temperature hydrothermal alteration of trachybasalt at Conical Seamount, Papua New Guinea: formation of smectite and metastable precursor phases

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Low-temperature hydrothermal alteration of intra-caldera ...

2008-10-15  Overall, the results from the intra-caldera tuffs on Gran Canaria are consistent with low-temperature alteration in the shallow, epithermal part of a larger, fault-controlled hydrothermal system associated with emplacement of the high-level Fataga magma chamber system (Fig. 11A–C). Water and/or steam would have migrated along caldera ...

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Low-temperature hydrothermal alteration of natural ...

The hydrothermal alteration event occurred contemporaneously with the main rifting phase of the Red Sea and widespread low- temperature mineralizations along the Red Sea coast. Keywords hydrothermal alteration zircon Eastern Desert Egypt metamictization Raman infrared.

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22. LOW-TEMPERATURE HYDROTHERMAL ALTERATION

2006-11-20  22. LOW-TEMPERATURE HYDROTHERMAL ALTERATION OF JURASSIC OCEAN CRUST, SITE 801 Jeffrey C. Alt,2 Christian France-Lanord,3 P. A. Floyd,4 Paterno Castillo,5 and Albert Galy3 ABSTRACT Low-temperature hydrothermal alteration of basement from Site 801 was studied through analyses of the mineralogy, chemistry, and oxygen isotopic

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Low-Temperature Hydrothermal Metamorphic

2012-2-1  The island-arc volcanics situated in the eastern part of the Căpîlnaş-Techereu nappe (South Apuseni Mountains, Romania) were studied to evaluate the temperature, fluid properties, and mineral chemistry during low-temperature metamorphism. Detailed observations of metamorphic mineral assemblages were conducted using powder X-ray diffraction and

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Li-isotope exchange during low-temperature alteration of ...

2021-2-1  If alteration of the upper oceanic crust made up a large fraction of the Li sink from the ocean then either the δ 7 Li of the diagenetic sink was much larger than that of the low-temperature hydrothermal sink, or the bulk δ 7 Li of the sources of Li to the ocean was similar to that of vent fluids (i.e., much lower than today).

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1.2 Low Temperature Properties of Materials

2015-3-5  1.2 Low Temperature Properties of Materials Materials properties affect the performance of cryogenic systems. Properties of materials vary considerably with temperature Thermal Properties: Heat Capacity (internal energy), Thermal Expansion Transport Properties: Thermal conductivity, Electrical conductivity

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Low-temperature hydrothermal alteration of mid-oceanic ...

2009-6-12  This result suggests that the low-temperature hydrothermal alteration at mid-oceanic ridge does not play an important role as an Mg sink. These petrological and geochemical features of B 1 -group and B 2 -group samples can be comparable to those of the upper and lower pillow zone in IPOD/ODP Hole 504B, respectively.

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Low-temperature hydrothermal alteration of natural ...

The hydrothermal alteration event occurred contemporaneously with the main rifting phase of the Red Sea and widespread low- temperature mineralizations along the Red Sea coast. Keywords hydrothermal alteration zircon Eastern Desert Egypt metamictization Raman infrared.

More

Low-temperature hydrothermal alteration of natural ...

good agreement with an apatite fission track age of 22.2—448 (2s) Ma. The hydrothermal alteration event occurred contemporaneously with the main rifting phase of the Red Sea and widespread low- temperature mineralizations along the Red Sea coast. Keyw o rds: hydrothermal alteration, zircon, Eastern Desert, Egypt, metamictization, Raman, infrared.

More

22. LOW-TEMPERATURE HYDROTHERMAL ALTERATION

2006-11-20  22. LOW-TEMPERATURE HYDROTHERMAL ALTERATION OF JURASSIC OCEAN CRUST, SITE 801 Jeffrey C. Alt,2 Christian France-Lanord,3 P. A. Floyd,4 Paterno Castillo,5 and Albert Galy3 ABSTRACT Low-temperature hydrothermal alteration of basement from Site 801 was studied through analyses of the mineralogy, chemistry, and oxygen isotopic

More

Investigating Low-temperature Hydrothermal Alteration

2014-11-19  Investigating Low-temperature Hydrothermal Alteration in Drill cuttings From Pilgrim Hot springs, Alaska, Using a suite of Low cost Analytical techniques Joshua K. Miller1, christian Haselwimmer2 , and Anupma Prakash2 1 Department of Geology and Geophysics, University of Alaska Fairbanks 2 Geophysical Institute, University of Alaska Fairbanks

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Low-Temperature Alteration at the World-Class LaRonde ...

Water-rock equilibrium exchange models indicate that the high δ 18 O values that characterize the LaRonde Penna deposit are compatible with low-temperature (~150ºC) hydrothermal alteration at high water-rock oxygen atomic ratios (1–50).

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Low temperature aqueous alteration of basalt: Mineral ...

2017-7-21  Ehlmann et al., 2012], hydrothermal and low temperature aqueous alteration of basalt in Svalbard, Norway [Hausrath et al., 2008a, 2008b], phyllosilicates in Deccan bole beds [Gavin et al., 2012], and alteration in the cold, dry climate of the Antarctic Dry Valleys (M. R. Salvatore et al., Initial stages of rock weathering in cold desert ...

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Seafloor Magnetism Under Hydrothermal Alteration:

2021-12-15  Intermediate hydrothermal alteration products retain a secondary chemical remanent magnetization (CRM) which is related to the long-term magnetization variations in oceanic basalts. The established framework allows characterizing MORB hydrothermal alteration and ultimately contributes to resolving the complexity of seafloor magnetism.

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Subsurface Geology, Petrology and Hydrothermal

2015-4-28  hydrothermal alteration and present state of the geothermal system. Petrochemistry of these wells revealed subsurface lithostratigraphy that includes, consolidated pyroclastic tuff, pyroclastics, basalt, trachybasalt, phonolite, trachy-andesite, syenitic intrusive units, while trachyte constitutes over 90% of the total.

More

1.2 Low Temperature Properties of Materials

2015-3-5  1.2 Low Temperature Properties of Materials Materials properties affect the performance of cryogenic systems. Properties of materials vary considerably with temperature Thermal Properties: Heat Capacity (internal energy), Thermal Expansion Transport Properties: Thermal conductivity, Electrical conductivity

More

Low-temperature hydrothermal alteration of mid-oceanic ...

2009-6-12  This result suggests that the low-temperature hydrothermal alteration at mid-oceanic ridge does not play an important role as an Mg sink. These petrological and geochemical features of B 1 -group and B 2 -group samples can be comparable to those of the upper and lower pillow zone in IPOD/ODP Hole 504B, respectively.

More

Low-temperature hydrothermal alteration of natural ...

good agreement with an apatite fission track age of 22.2—448 (2s) Ma. The hydrothermal alteration event occurred contemporaneously with the main rifting phase of the Red Sea and widespread low- temperature mineralizations along the Red Sea coast. Keyw o rds: hydrothermal alteration, zircon, Eastern Desert, Egypt, metamictization, Raman, infrared.

More

22. LOW-TEMPERATURE HYDROTHERMAL ALTERATION

2006-11-20  22. LOW-TEMPERATURE HYDROTHERMAL ALTERATION OF JURASSIC OCEAN CRUST, SITE 801 Jeffrey C. Alt,2 Christian France-Lanord,3 P. A. Floyd,4 Paterno Castillo,5 and Albert Galy3 ABSTRACT Low-temperature hydrothermal alteration of basement from Site 801 was studied through analyses of the mineralogy, chemistry, and oxygen isotopic

More

Investigating Low-temperature Hydrothermal Alteration

2014-11-19  Investigating Low-temperature Hydrothermal Alteration in Drill cuttings From Pilgrim Hot springs, Alaska, Using a suite of Low cost Analytical techniques Joshua K. Miller1, christian Haselwimmer2 , and Anupma Prakash2 1 Department of Geology and Geophysics, University of Alaska Fairbanks 2 Geophysical Institute, University of Alaska Fairbanks

More

Low temperature aqueous alteration of basalt: Mineral ...

2017-7-21  Ehlmann et al., 2012], hydrothermal and low temperature aqueous alteration of basalt in Svalbard, Norway [Hausrath et al., 2008a, 2008b], phyllosilicates in Deccan bole beds [Gavin et al., 2012], and alteration in the cold, dry climate of the Antarctic Dry Valleys (M. R. Salvatore et al., Initial stages of rock weathering in cold desert ...

More

Seafloor Magnetism Under Hydrothermal Alteration:

2021-12-15  Intermediate hydrothermal alteration products retain a secondary chemical remanent magnetization (CRM) which is related to the long-term magnetization variations in oceanic basalts. The established framework allows characterizing MORB hydrothermal alteration and ultimately contributes to resolving the complexity of seafloor magnetism.

More

Subsurface Geology, Petrology and Hydrothermal

2015-4-28  hydrothermal alteration and present state of the geothermal system. Petrochemistry of these wells revealed subsurface lithostratigraphy that includes, consolidated pyroclastic tuff, pyroclastics, basalt, trachybasalt, phonolite, trachy-andesite, syenitic intrusive units, while trachyte constitutes over 90% of the total.

More

Hydrothermal uranium uptake at ridge crests Nature

Although low-temperature alteration of the ocean floor traps large quantities of uranium from sea water1,2, the mass balance between the crust and sea water along the mid-ocean ridges and ...

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Abiotic formation of condensed carbonaceous matter in

2018-11-28  The crystallization and stability fields of these low-temperature assemblages give constraints on the formation of CCM-BastHadr and CCM-PPFtc assemblages during hydrothermal alteration at depth in ...

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Hydrothermal alteration mapping from Landsat-8 data,

2020-4-9  Hydrothermal alteration mapping from Landsat-8 data, Sar Cheshmeh copper mining district, south-eastern Islamic Republic of Iran Amin Beiranvand Pour∗, Mazlan Hashim Institute of Geospatial Science and Technology, Universiti Teknologi Malaysia, 81310 Skudai, Johor Bahru, Malaysia Available online 23 December 2014 Abstract

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