syngenetic


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syngenetic

[¦sin·jə¦ned·ik]
(geology)
Pertaining to a primary sedimentary structure formed contemporaneously with sediment deposition.
Pertaining to a mineral deposit formed contemporaneously with the enclosing rock. Also known as ideogenous.
References in periodicals archive ?
It is a large, syngenetic magma body composed of basic and ultra-basic rocks emplaced an estimated 2.8B years ago.
Beaudoin, "Proterozoic Pb isotope evolution in the Belt-Purcell Basin; constraints from syngenetic and epigenetic sulfide deposits," Economic Geology, vol.
This occurrence is a stratabound pod and was originally interpreted as a syngenetic VMS showing (e.g., Snow and Coker 1987).
The presence of pyrite as framboids and as isolated euhedral forms in Oropos-Kalamos bulk-lignite samples supports the hypothesis that pyrite is of syngenetic origin as a result of the reaction between ferrous ions, sulfur ions, and elemental sulfur by bacterial reduction in the reducing deposition environment.
When exploitation in altered oecotopes corresponding to this type of forest is excluded, a syngenetic evolution by enrichment and competition among species is also developed, up to reach a stage of secondary tree shrubwood, in which few species dominate the coverage.
[41, 12, 20], or 2) flushing of the sediments by metal-enriched syngenetic brines or contemporaneous exhalation of such brines into marine basin, e.g.
The U occurrences are syngenetic and appear to bear some similarities to the world-class Uranium deposit of Rossing in Namibia (Laznicka 1993), which is characterized by low-grade ore (approx.
All of the topaz thus far recovered has been found in miarolitic, syngenetic pegmatites in the Mesozoic alkali granite (Menzies, 1995).
Syngenetic barite and subordinate amounts of low-grade sulphide rock and silica rock were deposited as sediments.
In the Precordillera and Frontal Cordillera areas (San Juan and Mendoza provinces), syngenetic mineral deposits are associated with ophiolites in suture zones that carry chromite, magnetite and massive sulphides, talc and asbestos; the talc and asbestos have resulted from post-ophiolite metamorphism.
The early nonluminescent C1 to growth zones of dark red luminescent C2 is a syngenetic seawater-shallow burial diagenetic environment; the subsequent nonluminescent C3 is related to the meteoric fluid system resulting from tectonic uplift and exposure.