Zusammenfassung
Die Grundzüge der geosynklinalen und orogenen Entwicklung des Faltengürtels von Petchabun werden beschrieben. Bisher wurde angenommen, daß dieses Gebiet während der „Indosinischen“ Orogenese (Trias) deformiert wurde. Die neuen Daten belegen, daß die bedeutendste Orogenese in Thailand nach dem Unter Perm einsetzte (West-Thailand) und vor dem höchsten Perm abgeschlossen war (Petchabun). Die sog. „Paleotethys“ wurde während dieser Orogenese hier geschlossen. Die bekannten obertriadischen Deformationen sind dagegen rein intrakontinental und somit von untergeordneter Bedeutung.
Abstract
The main aspects of the geosynclinal and orogenic evolution of the Petchabun foldbelt in Central Thailand are described. This area was previously thought to be deformed by the „Indosinian“ (Triassic) orogeny. The new data show that the main orogenic event in Thailand can be dated: Post Lower Permian — Pre Uppermost Permian. Evidence is given that „Paleotethys“ closed on Thai territory during this orogenic event. The known Upper Triassic deformations in Northern Thailand are supposed to be strictly intracontinental and therefore of minor importance.
Résumé
Les traits principaux du développement géosynclinal et orogénique de la ceinture plissée du Petchabun (Thailande) sont décrits. Jusqu'à présent on pensait que cette région avait été déformée pendant l'orogenèse «Indosinienne» (Trias). Les données nouvelles indiquent que l'orogenèse la plus importante a commencée après le Permien inférieur (dans l'Ouest de la Thailande) et qu'elle s'est terminée avant le Permien supérieur (région de Petchabun). Ici, la soi-disant «Paléotéthys» s'est fermée au cours de cette orogenèse. Les déformations bien connues du Trias supérieur sont exclusivement intracontinentales et n'ont ainsi qu'une signification subordonnée.
Краткое содержание
Описаны основные чер ты геосинклинальног о и горообразовательно го развития пояса складок Petchabun. До сих пор считалось, что эта область была деформирована во вре мя „индокитайского“ орогенеза (триас). Новые данные говорят о том, что наиб олее значительные ор огенезы в Таиланде протекали после ранней Перми (за падный Таиланд) и зако нчились до поздней перми (Petchabun). Т. н. „Палеотетис“ за крылся во время этого орогенеза. Зато известные верхнетри асовый деформации яв ляются чисто интраконтитентальн ыми и имеют второстепенн ое значение
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Helmcke, D., Lindenberg, HG. New data on the „Indosinian“ Orogeny from Central Thailand. Geol Rundsch 72, 317–328 (1983). https://doi.org/10.1007/BF01765912
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DOI: https://doi.org/10.1007/BF01765912