Deep water sedimentary characteristics of expansion transformation margin in the Xisha area of the South China Sea
Notice bibliographique
Résumé
Xisha Area is located in the northern part of the South China Sea. The water depth is about 1000m to 3000m. Since Cenozoic , the Xisha area has experienced dual effects of extension and strike slip on the western margin, forming a special tectonic background of continental slope uplift. Overall, the Xisha area belongs to the continental slope system of the northern South China Sea. It is separated by the Qiongdongnan Basin to the north, on the west connected to the Yuedong Shelf , and  on the south and east ,adjacent to the deep-sea basin. It has developed three stages of sedimentation: fault depression, fault depression transformation, and depression. During the transition and depression periods, carbonate platform sediments developed due to rising sea levels and lacking of injection of terrestrial debris. After the Middle Miocene, the Xisha area was deep-water sedimentary environment on the continental slope, dominated by deep-sea to semi deep-sea sediments, with carbonate platform sediments developed on local uplifts. Under the special tectonic background, two types of deep-water sedimentary systems developed in the Xisha Sea during the Miocene period.During Miocene ,the Xisha Sea area was marine sedimentary environment, with developping two different types of deep-water sedimentary bodies. One type is a deep-water channel supplied by terrestrial debris from the Yuedong River system, and the other is a deep-water channel supplied by carbonate debris from the Xisha Platform. Deep water channels supplied by terrestrial debris are mainly influenced by ancient topography and sea level rise and fall, with strong mobility and mutual cutting characteristics between channels; Deep water channels supplied by carbonate rock debris are mainly influenced by ancient topography, with vertical accretion as the main source and weak mobility of the channels.The deep water channels filled with terrestrial debris developed in the research area are a process of low sea level and early marine invasion from the early to late stages of channel development. From the early stage to the late stage ,the limitation of deep water channels gradually becoming weaker, and the channels developping from a single channel with strong restriction in the early stage to a composite channel with multiple single channels cutting and overlapping each other in the middle stage, and then to late stage channel complexes and channelized lobes.In the Late Miocene, deep-water channels filled with carbonate rock debris developed in the Xisha Sea area, mainly in the depressions between the Guangle Platform and the Xisha Platform  and on the east side of the Huaguang sag. This type of deep-water channel developed in the early Late Miocene, and on seismic profiles, the reflection characteristics in the upstream and downstream are relatively similar, mainly consisting of a single channel vertically stacked. However, the location of the channel is different, and the characteristics of the channel also changed. The filling material of this type of channel is carbonate rock debris from the Xisha Platform, which has strong paleotopographic limitations and is mainly vertically accreted. 
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Comment cette classification a été obtenuedéplier
Prédiction distillée sur la base complète
Imitation des enseignantsNi prévalence calibrée, ni vérité terrain. Validation humaine à venir. Apprise à partir de 10 348 étiquettes directes de Codex et de 10 348 étiquettes directes de Gemma. Le mode candidate est l'union des têtes enseignantes seuillées; le consensus est leur intersection. Ces sorties portent le statut machine_predicted_unvalidated et ne sont ni des étiquettes humaines ni des étiquettes directes de modèles de pointe.
Scores Codex et Gemma par catégorie
| Catégorie | Codex | Gemma |
|---|---|---|
| Métarecherche | 0,000 | 0,000 |
| Méta-épidémiologie (sens strict) | 0,000 | 0,000 |
| Méta-épidémiologie (sens large) | 0,000 | 0,000 |
| Bibliométrie | 0,000 | 0,000 |
| Études des sciences et des technologies | 0,000 | 0,000 |
| Communication savante | 0,000 | 0,000 |
| Science ouverte | 0,000 | 0,000 |
| Intégrité de la recherche | 0,000 | 0,000 |
| Charge utile insuffisante (le modèle a refusé de juger) | 0,001 | 0,000 |
Scores machine (provisoires)
Les deux têtes enseignantes du modèle étudiant, lues sur ce travail. Un score ordonne la base pour la relecture; il n'affirme jamais une catégorie, et le statut de validation accompagne chaque rangée tel quel.
Scores de référence d'un modèle non mature (critères de maturité non atteints, 7 itérations). Un score ordonne; il n'affirme jamais une catégorie.
score_only:v0-immature-baseline · tel quel depuis la passe de notation : score_only signifie que le nombre peut ordonner les travaux, et qu'aucune étiquette de catégorie n'en découleClassification
machine, non validéePrédiction automatique; un appel candidat d’une seule tête enseignante, pas un consensus.
Le détail, modèle par modèle et score par score, se trouve en fin de page sous « Comment cette classification a été obtenue ».