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Research Progresses on Hyperpycnal Flow Deposits

Authors:

Abstract

Hyperpycnal flow is a kind of sustained turbidity currents generating from flood-river estuary, flowing along the bottom of water for its higher density than catchment basins water. It has frequent occurrences and stable sediments supplies, which are triggered by river floods. Hyperpycnal flow is controlled by factors of topography, climate and density differences. It takes place in both marine facies and terrestrial lacustrine basin. Hyperpycnal flow deposits in lacustrine basins have advantages of lower water density, closer to source areas, enough terrain altitude difference, well developed mesoscopic rivers or streams and active tectonic movements, comparing to marine environment. Hyperpycnal flow appears a diluting tendency from vicinity to distance and corresponds to specific sedimentary structures and sequences. Hyperpycnites or hyperpycnal flow deposits can be distinguished from turbidites by: well developed micro-erosional surfaces, the combinations of upward-coarsening intervals and upward-fining intervals formed in waxing and waning flows, and the richness in terrestrial organic matters. It has important scientific values and practical significances to make further researches on hyperpycnal flow deposits. It will be not only propitious to fulfill sedimentary theory of deep-water gravity flows and to analyze sedimentary environment, but also in favor of guiding exploration of deep-water unconventional petroleum.
4th INTERNATIONAL CONFERENCE
of PALAEOGEOGRAPHY
ABSTRACTS
Beijing, China
September, 2019
112
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BO-12
Research Progresses on Hyperpycnal Flow Deposits
Renchao Yan g 1,2, A.J. (Tom) Vanloon3, Carlos Zavala4, Zuozhen Han 1, Aiping Fan 1, and Funing
Sun 1
(1. College of Earth Science and Engineering, Shandong University of Science and Technology,
Qingdao 266590, Shandong, China;2. Laboratory for Marine Mineral Resources, Qingdao
National Laboratory for Marine Science and Technology, Qingdao 266071, China;3. Geocom
Consultants, Valle del Portet 17, 03726 Benitachell, Spain; 4. GCS Argentina
Calle Interna
1320, Bahia Blanca
B8JUF
O
Argentina)
Abstract: Hyperpycnal flow is a kind of sustained turbidity currents generating from
flood-river estuary, flowing along the bottom of water for its higher density than
catchment basins water. It has frequent occurrences and stable sediments supplies,
which are triggered by river floods. Hyperpycnal flow is controlled by factors of
topography, climate and density differences. It takes place in both marine facies and
terrestrial lacustrine basin. Hyperpycnal flow deposits in lacustrine basins have
113
advantages of lower water density, closer to source areas, enough terrain altitude
difference, well developed mesoscopic rivers or streams and active tectonic movements,
comparing to marine environment. Hyperpycnal flow appears a diluting tendency from
vicinity to distance and corresponds to specific sedimentary structures and sequences.
Hyperpycnites or hyperpycnal flow deposits can be distinguished from turbidites by:
well developed micro-erosional surfaces, the combinations of upward-coarsening
intervals and upward-fining intervals formed in waxing and waning flows, and the
richness in terrestrial organic matters. It has important scientific values and practical
significances to make further researches on hyperpycnal flow deposits. It will be not
only propitious to fulfill sedimentary theory of deep-water gravity flows and to analyze
sedimentary environment, but also in favor of guiding exploration of deep-water
unconventional petroleum.
Key words: Hyperpycnal flow, Hyperpycnites, Gravity flows, Control factors,
Sedimentary characteristics, Depositional model
价
 1,2, A.J. (Tom) Vanloon3, Carlos Zavala4,  1,  1,  1
(1.
们乾们
266590

;2.
仅
,
们之O
266071

;3.Geocom Consultants, Valle del
Portet 17, 03726 Benitachell, Spain;4.GCS Argentina
Calle Interna 1320, Bahia Blanca
B8JUF
O
Argentina)
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