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3 results on '"calcite veins"'

1. U-Pb dating and geochemical dataset of fracture-filling calcite veins from the Bóixols-Sant Corneli anticline (Southern Pyrenees)

Author

Daniel Muñoz-López, David Cruset, Jaume Vergés, Irene Cantarero, Antonio Benedicto, Vinyet Baqués, Xavier Mangenot, Richard Albert, Axel Gerdes, Aratz Beranoaguirre, and Anna Travé

Subjects
Fluid flow, Calcite veins, Fractures, Geochemistry, U-Pb geochronology, Bóixols-Sant Corneli anticline, Computer applications to medicine. Medical informatics, R858-859.7, Science (General), Q1-390
Abstract

U-Pb dating and geochemical analyzes (δ18O, δ13C, Δ47, 87Sr/86Sr and elemental composition) have been applied to fracture-filling calcite veins and host carbonates from the Bóixols-Sant Corneli anticline, which developed along the front of the Bóixols thrust sheet in the Southern Pyrenees. This robust dataset is used to determine: (i) the absolute timing of fracturing and mineralization from fluid flow; (ii) the age and duration of fold evolution; and (iii) the variations and implications of fluid behavior across the anticline, as has been described in the article “Spatio-temporal variation of fluid flow behavior along a fold: The Bóixols-Sant Corneli anticline (Southern Pyrenees) from U–Pb dating and structural, petrographic, and geochemical constraints – Marine and Petroleum Geology (2022) (Muñoz-López et al., 2022).In this new contribution, we present the raw data that have been analyzed and discussed in the related research article and, also, the whole elemental and REE composition of calcite veins and host carbonates that has not been published yet. These data may be used to unravel the age and origin of veins, to understand their sequential evolution in orogenic belts and to compare our results with those obtained in similar settings worldwide.

Published
2022
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2. U-Pb dating and geochemical dataset of fracture-filling calcite veins from the Boixols-Sant Corneli anticline (Southern Pyrenees)

Author

Mineralogía y petrología, Mineralogia eta petrologia, Muñoz López, José Daniel, Cruset, David, Vergés, Jaume, Cantarero, Irene, Benedicto, Antonio, Baqués, Vinyet, Mangenot, Xabier, Albert, Richard, Gerdes, Axel, Beranoaguirre de Miguel, Aratz, Travé, Anna, Mineralogía y petrología, Mineralogia eta petrologia, Muñoz López, José Daniel, Cruset, David, Vergés, Jaume, Cantarero, Irene, Benedicto, Antonio, Baqués, Vinyet, Mangenot, Xabier, Albert, Richard, Gerdes, Axel, Beranoaguirre de Miguel, Aratz, and Travé, Anna

Abstract

U-Pb dating and geochemical analyzes ( 818 O, 813 C, A47 , 87 Sr/ 86 Sr and elemental composition) have been applied to fracture-filling calcite veins and host carbonates from the Boixols-Sant Corneli anticline, which developed along the front of the Boixols thrust sheet in the Southern Pyrenees. This robust dataset is used to determine: (i) the absolute timing of fracturing and mineralization from fluid flow; (ii) the age and duration of fold evolution; and (iii) the variations and implications of fluid behavior across the anticline, as has been described in the article "Spatio-temporal variation of fluid flow behavior along a fold: The Boixols-Sant Corneli anticline (Southern Pyrenees) from U-Pb dating and struc-tural, petrographic, and geochemical constraints - Marine and Petroleum Geology (2022) (Munoz-Lopez et al., 2022). In this new contribution, we present the raw data that have been analyzed and discussed in the related research article and, also, the whole elemental and REE composition of cal-cite veins and host carbonates that has not been published yet. These data may be used to unravel the age and origin of veins, to understand their sequential evolution in orogenic belts and to compare our results with those obtained in sim-ilar settings worldwide.

Published
2022

3. The origin of fluid in calcite veins and its implications for hydrocarbon accumulation in the Shunnan-Gucheng area of the Tarim Basin, China

Author

Xuguang Sha, Binbin Xi, Yixiong Qian, Donghua You, Jun Han, and Huili Li

Subjects
Calcite, Tarim Basin, 010504 meteorology & atmospheric sciences, lcsh:Gas industry, δ18O, lcsh:TP751-762, Geochemistry, Calcite veins, 010502 geochemistry & geophysics, 01 natural sciences, Matrix (geology), chemistry.chemical_compound, chemistry, Ordovician, Meteoric water, Fluid inclusions, Shunnan-Gucheng area, Inclusion (mineral), Dissolution, Geology, Diagenetic-hydrocarbon fluid, 0105 earth and related environmental sciences
Abstract

The high-angle, structural genetic calcite veins of the Ordovician in the Shunnan-Gucheng area in the Tarim Basin provide a convenient study of fluid properties, hydrocarbon migration, and accumulation events in the fault zone of this area. Based on detailed core investigation, studies on fluid inclusions in calcite veins and comparison of geochemical characteristics of limestone matrix and calcite veins were carried out. Multiple types of hydrocarbons inclusion (e.g., dry asphalt inclusion,three-phase hydrocarbon inclusion, oil and water inclusion,gas-rich inclusion) were found in calcite veins. Furthermore, the coexisted aqueous inclusions with the gas–liquid phase had a high homogenization temperature (130–160 °C). The distribution characteristics of 18O-depleted (δ18O: −13.1‰ to −8.7‰), 87Sr-enriched (87Sr/86Sr: 0.708 879 to 0.710 432), relatively high total Rare Earth Elements (REEs), and positive Europium Anomalies indicated that the structural origin of calcite veins was mainly derived from the dissolution of surrounding rocks and diagenetic-hydrocarbon fluids. Participation signs of meteoric water were not proved. The rich hydrocarbon inclusions in the calcite veins indicated that the north-east strike-slip fault zone in the Shunnan-Gucheng area is an essential channel for hydrocarbon migration and accumulation.

Published
2020

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