New insights in the origin of cone-in-cone structures

Previous theories on cone-in-cone structure origin have failed to explain some of its features, such as the absence of cone-in-cone in veins other than horizontal and the cross-cutting relations of conical surfaces to detritical clay films. They have neither taken in account the importance of pore p...

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Detalles Bibliográficos
Autor principal: Selles-Martinez, J.
Formato: JOUR
Materias:
concretion
cone-in-cone structure
hypothesis
pore pressure
shale
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_08912556_v9_n2_p172_SellesMartinez
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_08912556_v9_n2_p172_SellesMartinez
record_format dspace
spelling todo:paper_08912556_v9_n2_p172_SellesMartinez2023-10-03T15:41:18Z New insights in the origin of cone-in-cone structures Selles-Martinez, J. concretion cone-in-cone structure hypothesis pore pressure shale Previous theories on cone-in-cone structure origin have failed to explain some of its features, such as the absence of cone-in-cone in veins other than horizontal and the cross-cutting relations of conical surfaces to detritical clay films. They have neither taken in account the importance of pore pressures in the process of growth of veins and concretions nor the effects of its fall in the deformation of these calcite bodies. A new hypothesis for cone-in-cone origin is presented, which states that cones are a secondary feature. They are superimposed on crystalline aggregates that grow in overpressured chambers and formed as a result of brittle fracture induced by a decrease in pore pressure within materials having different mechanical properties (plastic host sediments and brittle calcite bodies). The acceptance of this hypothesis will help in the identification of seals in ancient diagenetic environments and in assessing depth of entrapment for fluids. © 1994 Springer. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_08912556_v9_n2_p172_SellesMartinez
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic concretion
cone-in-cone structure
hypothesis
pore pressure
shale
spellingShingle concretion
cone-in-cone structure
hypothesis
pore pressure
shale
Selles-Martinez, J.
New insights in the origin of cone-in-cone structures
topic_facet concretion
cone-in-cone structure
hypothesis
pore pressure
shale
description Previous theories on cone-in-cone structure origin have failed to explain some of its features, such as the absence of cone-in-cone in veins other than horizontal and the cross-cutting relations of conical surfaces to detritical clay films. They have neither taken in account the importance of pore pressures in the process of growth of veins and concretions nor the effects of its fall in the deformation of these calcite bodies. A new hypothesis for cone-in-cone origin is presented, which states that cones are a secondary feature. They are superimposed on crystalline aggregates that grow in overpressured chambers and formed as a result of brittle fracture induced by a decrease in pore pressure within materials having different mechanical properties (plastic host sediments and brittle calcite bodies). The acceptance of this hypothesis will help in the identification of seals in ancient diagenetic environments and in assessing depth of entrapment for fluids. © 1994 Springer.
format JOUR
author Selles-Martinez, J.
author_facet Selles-Martinez, J.
author_sort Selles-Martinez, J.
title New insights in the origin of cone-in-cone structures
title_short New insights in the origin of cone-in-cone structures
title_full New insights in the origin of cone-in-cone structures
title_fullStr New insights in the origin of cone-in-cone structures
title_full_unstemmed New insights in the origin of cone-in-cone structures
title_sort new insights in the origin of cone-in-cone structures
url http://hdl.handle.net/20.500.12110/paper_08912556_v9_n2_p172_SellesMartinez
work_keys_str_mv AT sellesmartinezj newinsightsintheoriginofconeinconestructures
_version_ 1807320005504663552

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