A sed i ment bud get for the cen tral Viet nam shelf off Nha Trang over the last deglacial Ho lo cene highstand pe riod has been inves ti gated on the ba sis of shal low seis mic and sed i ment core data and em pir i cal equa tions. The an nual sus pended sed i ment dis charge to the Nha Trang shelf ranges from: 4.3 to 5.4 Mt/year. Es ti mates based on pub lished em pir i cal equa tions sug gest that the sed i ment dis charge by three main lo cal moun tain ous rivers (the Cai, Dinh and Van Phong rivers) that en ter the Nha Trang shelf ranges be tween 1.7 and 4 Mt/year, which im plies that the lo cal rivers dis charge ap prox i mately 75% of the to tal an nual sed i ment in put to the shelf. The an nual sed i ment sup ply of the Cai River is ap prox i mately 2 and 6 times higher than that of the Dinh and Van Phong rivers, re spec tively. The highstand sed i ment depocentre of the Nha Trang shelf is mostly attached to the lo cal river out flows, in di cat ing their im por tance as the prin ci pal sed i ment sup ply sources to the shelf. Ad di tional sources of sed i ment sup ply to the Nha Trang shelf can prob a bly be re lated to along-shore trans port from the nearby shelves. Cal cu la tions based on seis mic and sed i ment core data in di cate that the net sed i ment vol ume stor age on the Nha Trang shelf is ap prox i mately 2.15 Mt/year. Ap prox i mately 50% of the to tal sed i ment yield sup plied to the shelf is prob a bly trans ported along-shore to the south. The sed i ment bud get model for highstand de pos its on the Nha Trang shelf is typ i cal for a small moun tain ous river ba sin, which is sig nif i cantly dif fer ent from that of the large river delta sys tems in Viet nam such as the Mekong and Red rivers where 90% of the river sed i ments are cap tured on the delta plain/sub aque ous part and only 10% of the river sed i ments are trans ported to the nearby shelf. In con trast, most of the sed i ments sup plied by small moun tain ous rivers off Nha Trang are trans ported to the mid-shelf, form ing a shore-par al lel mud depocentre. Key words: sed i ment bud get, Nha Trang shelf, cen tral Viet nam, Ho lo cene highstand, se quence stra tig ra phy.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.