Results 111 to 120 of about 20,814 (259)

The stability of MG-chlorite [PDF]

, 1985
The equilibrium Chlorite = Cordierite + Forsterite + Spinel + H₂0 has been experimentally determined with a chlorite of composition Mg₄.₇₅Al₂.₅Si₂.₇₅O₁₀(OH)₈.
McPhail, Derry Campbell
core  

Formation of corrensite, chlorite and chlorite-mica stacks by replacement of detrital biotite in low-grade pelitic rocks [PDF]

, 1994
Transmission and scanning electron microscopy were utilized to investigate the nature and mechanisms of alteration of abundant detrital biotite of volcanic origin and progressive modification of phyllosilicate aggregates in a prograde sequence of pelitic
DONALD R. PEACOR, Peacor, Donald R., WEI‐TEH JIANG, Jiang, Wei-Teh   +3 more
core   +1 more source

Subduction Initiation and Early Subduction Zone Development: Insights From the P–T–t Path of the Bay of Islands Metamorphic Sole

Journal of Metamorphic Geology, EarlyView.
ABSTRACT The processes involved during subduction initiation (SI) remain poorly constrained, in part due to the rarity of geological archives. Ophiolites and their underlying metamorphic soles are thought to form during subduction zone infancy and may thus provide critical constraints. Metamorphic soles are derived from oceanic crust of the lower plate
François Fournier‐Roy, Carl Guilmette, Mark Coleman, Kyle Larson, Douglas K. Tinkham, Alana M. Hinchey, John Wakabayashi, Jean H. Bédard, Louise Mérit, Philippe Agard, Loïc Labrousse, Antoine Godet   +11 more
wiley   +1 more source

Regional retrograde alteration of sub-greenschist facies chlorite to smectite [PDF]

, 1994
Dioctahedral smectite is present as a retrograde alteration product of chlorite in Permian-Triassic red slates of the Malaguide Complex in Sierra de Espuña (Betic Cordillera).
Nieto, Fernando, Huertas, Miguel Ortega, Velilla, Nicolás, Ortega-Huertas, M., Nieto, F., Peacor, Donald R., Peacor, D. R.   +6 more
core   +1 more source

Feldspar Albitization With Implications for Reservoir Quality Evolution of Eocene Turbidite Sandstones in Offshore Espírito Santo Basin, Eastern Brazil

Journal of Petroleum Geology, EarlyView.
ABSTRACT The diagenetic albitization of plagioclase and K‐feldspar grains is a transformative process that significantly alters sandstone's detrital composition and formation water chemistry, impacting reservoir quality. In this study, Eocene turbidite sandstones from the offshore Espírito Santo Basin, Brazil, were investigated to elucidate the role of
Eveline E. Zambonato, Luiz F. De Ros, Howri Mansurbeg   +2 more
wiley   +1 more source

Mica-chlorite intermixing and altered chlorite from the Nevado-Filabride micaschists, Southern Spain [PDF]

, 1991
12 páginas, 4 figuras, 2 tablasMinerals with biotite-like optical properties occur in the Nevado-Filabride micaschists. The grains are highly pleochroic, variable in colour from light yellow to deep red, and strongly recall the descriptions given for ...
Álvarez, F., Gómez-Pugnaire, M. T., Mellini, Marcello, Nieto, F.   +3 more
core  

Major elements geochemistry of chlorite in different ore deposits and its genesis and exploration significance: a case study from Naruo porphyry Cu deposit in Duolong ore district, Tibet

Frontiers in Earth Science
Chlorite is present extensively in many types of deposits. The mechanism underlying the chemical variations in chlorite remains unclear. The Naruo porphyry deposit is a giant copper porphyry deposit in the Duolong ore district of Tibet.
Faqiao Li, Juxing Tang, Yang Song, She Li, Pan Tang, Haifeng Li, Huanhuan Yang, Qin Wang, Yongqiang Wang, Zongzhui Danzeng, Yanbo Li, Jianli Li, Hongwei Li, Yujie Dong   +13 more
doaj   +1 more source

Porosity Preservation in Deeply Buried (8500 m) Jurassic Calcareous Mudstones of the Vienna Basin (Austria)

Terra Nova, EarlyView.
ABSTRACT Significant porosity of more than 5% was found at depths of more than 8500 m in poorly sorted, calcareous mudstones of the Malmian Mikulov Formation. These overpressured rocks are the main hydrocarbon source rock in the Vienna Basin. Core samples from present‐day depths of 8150 m to 8550 m were analysed using X‐ray diffraction and scanning ...
Susanne Gier, Jürgen Schieber, Andrea Forstner‐Schicker, Peter Krois   +3 more
wiley   +1 more source

Chlorite, corrensite, and chlorite-mica in Late Jurassic fluvio-lacustrine sediments of the Cameros Basin of Norheastern Spain [PDF]

, 2000
The distribution and crystal-chemical characteristics of chlorite, eorrensite, and mica in samples from a stratigraphic profile in the Cameros basin are controlled by changes in the sedimentary facies.
Rodas González, Magdalena, Frey, Martín, Fernández Barrenechea, José María, Mas Mayoral, José Ramón, Alonso Azcárate, Jacinto   +4 more
core   +1 more source

Occurrence and Levels of Glyphosate, Chlorate and Perchlorate in Irish Drinking Water: A Pilot Study

Water and Environment Journal, EarlyView.
ABSTRACT Safe drinking water is a crucial component of public health. Pesticides and disinfection byproducts are known pollutants of concern. This study aimed to investigate the levels of the herbicide glyphosate and disinfection byproducts in Irish drinking water.
Sewon Lee, Marie A. Coggins, Jim Garvey, Alison Connolly   +3 more
wiley   +1 more source