Title of article :
A new approach to kimberlite facies terminology using a revised general approach to the nomenclature of all volcanic rocks and deposits: Descriptive to genetic
Author/Authors :
Cas، نويسنده , , Ray and Porritt، نويسنده , , Lucy and Pittari، نويسنده , , Adrian and Hayman، نويسنده , , Pat، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2008
Pages :
15
From page :
226
To page :
240
Abstract :
Although kimberlite pipes/bodies are usually the remains of volcanic vents, in-vent deposits, and subvolcanic intrusions, the terminology used for kimberlite rocks has largely developed independently of that used in mainstream volcanology. Existing kimberlite terminology is not descriptive and includes terms that are rarely used, used differently, and even not used at all in mainstream volcanology. In addition, kimberlite bodies are altered to varying degrees, making application of genetic terminology difficult because original components and depositional textures are commonly masked by alteration. This paper recommends an approach to the terminology for kimberlite rocks that is consistent with usage for other volcanic successions. In modern terrains the eruption and emplacement origins of deposits can often be readily deduced, but this is often not the case for old, variably altered and deformed rock successions. A staged approach is required whereby descriptive terminology is developed first, followed by application of genetic terminology once all features, including the effects of alteration on original texture and depositional features, together with contact relationships and setting, have been evaluated. Because many volcanic successions consist of both primary volcanic deposits as well as volcanic sediments, terminology must account for both possibilities.
Keywords :
terminology , Volcanic , alteration , Descriptive , Genetic
Journal title :
Journal of Volcanology and Geothermal Research
Serial Year :
2008
Journal title :
Journal of Volcanology and Geothermal Research
Record number :
2245619
Link To Document :
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