Scientific Quarterly Journal of Geosciences

Scientific Quarterly Journal of Geosciences

Facies, depositional environments, and sandstone provenance of the Hojedk Formation in Zarand area, Northwest Kerman

Document Type : Original Research Paper

Authors
Yaghoub Lasemi
Ali Kheradmand
Teacher training University of Iran, Tehran, Iran
Abstract
The Hojedk Formation (Middle Bajocian-Lower Bathonian) is a thick, mainly siliciclastic and coal- bearing succession, in the Zarand area, northwest Kerman. It thickens along the Kuhbanan Fault, where its thickness exceeds than 1000 meters. The lower contact of the Hojedk Formation is gradational with the Badamu Formation. Its upper contact with the basal conglomerate of the Bidou Formation is an erosional unconformity.
The purpose of this study is facies analysis, recognition of depositional environments and sandstone provenance of the Hojedk Formation in the Zarand area. This area is a part of a" pull apart basin " developed between Nayband and Kuhbanan strike -slip faults during Middle - Late Jurassic time.
The lower portion of the Hojedk Formation was deposited in a river dominated delta, but the main part of the formation (middle and upper portion) was deposited in a meandering river environment. The sandstones of the Hojedk Formation are mainly phyllarenite, in which over 50% of the grains are low - grade metamorphic rock fragments. The north - northwest to south-southeast paleocurrent direction and northward increase in grain size, along the Kuhbanan Fault, indicate a north to northwest source for the siliciclastic rocks of the Hojedk Formation.
Keywords
depositional environments
Hojedk Formation
Zarand

Subjects

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Scientific Quarterly Journal of Geosciences
Volume 8, 31-32
Spring & Summer 1999, vol. 8, No. 31-32
Summer 2000
Pages 50-63