Breakup of China-Korea Platform and Establishment of North China and Huatai Cratons
Notice bibliographique
Résumé
Half a century ago, the well-known pre-Cambrian crystalline basement outcrops extensively in the southern Northeast China, North China and Alashan Desert of Northwest China, which were considered by T.K. Huang and J.S. Ren as a unitary China-Korea Platform. This idea has been being in use until now. Recently, the studies of tectonostratigraphic terrain demonstrate that the China-Korea Platform is composed of both the North China Craton and the Huatai Craton, and contains 11 terrains in all. The range of North China Craton redefined was limited within northern and western Liaoning province, Hebei province, main part of Shanxi province, and northern Shaanxi province. The other regions of original China-Korea Platform, including southern Jilin province, Liaodong peninsula, Shandong province, northern parts of Anhui and Jiangsu provinces, Henan province, the Shaanxi plain and the Alashan Desert-Helan Mts. constitute the new established Huatai craton. The boundary between two cratons and adjacent Paleozoic organic belts are separated by a series of large faults. The North China Craton is the initial continent crust in whole China, which is composed of 4 terrains, including the Yanliao continent block, Jinji orogenic belt, Mengshan continent block and the Yinshan rift belt. The North China Craton originated from the late Paleoproterozoic (1850Ma) orogeny and collision, which resulted in assembly of the former 3 terrains and finally solidification of the craton. The Yinshan rift belt occurred in Mesoproterozoic and was the remains of separation of North China Craton and Siberia Platform. The prominent features of North China Craton are the unconformity between Paleoproterozoic Hutuo Group and Mesoproterozoic Changcheng System, and the deposition of Mesoproterozoic caprock represented by the Jixian profile. According to these characteristics, only Siberia Platform and Canada Shield in the world are comparable to this craton. Over the crystalline basement of Huatai Craton, the first unconformity between Palaeo-Meso Proterozoic Liaohe Group and Neoproterozoic Xihe Group marked its solidification in about 1000 Ma. Therefore, the origin of Huatai Craton can be traced in the world. It is quite evident that Rodinia was a united ancient continent in Neoproterozoic. In view of Cambrian stratigraphic studies in China, it is believed that the assembly between North China Craton and Huatai Craton occurred at the beginning of the Middle Cambrian (about 536 Ma). Before Middle Cambrian, two cratons belonged to different ancient continents and had never been jointed. Therefore there was no united China-Korea Platform during the period from Archean to early stage of Cambrian.
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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) | 0,000 | 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 ».