Geology of the Purcell Trench rift valley and Sandpoint Conglomerate: Eocene en echelon normal faulting and synrift sedimentation along the eastern flank of the Priest River metamorphic complex, northern Idaho
Notice bibliographique
Résumé
Research Article| September 01, 2000 Geology of the Purcell Trench rift valley and Sandpoint Conglomerate: Eocene en echelon normal faulting and synrift sedimentation along the eastern flank of the Priest River metamorphic complex, northern Idaho P.T. Doughty; P.T. Doughty 1Department of Geological Sciences, Queen's University, Kingston, Ontario K7L 3N6, Canada Search for other works by this author on: GSW Google Scholar R.A. Price R.A. Price 1Department of Geological Sciences, Queen's University, Kingston, Ontario K7L 3N6, Canada Search for other works by this author on: GSW Google Scholar GSA Bulletin (2000) 112 (9): 1356–1374. https://doi.org/10.1130/0016-7606(2000)112<1356:GOTPTR>2.0.CO;2 Article history received: 31 Mar 1997 rev-recd: 24 Apr 1999 accepted: 01 Nov 1999 first online: 01 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Twitter LinkedIn Tools Icon Tools Get Permissions Search Site Citation P.T. Doughty, R.A. Price; Geology of the Purcell Trench rift valley and Sandpoint Conglomerate: Eocene en echelon normal faulting and synrift sedimentation along the eastern flank of the Priest River metamorphic complex, northern Idaho. GSA Bulletin 2000;; 112 (9): 1356–1374. doi: https://doi.org/10.1130/0016-7606(2000)112<1356:GOTPTR>2.0.CO;2 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGSA Bulletin Search Advanced Search Abstract The Priest River metamorphic complex is separated from less metamorphosed rocks to the east by the Purcell Trench, a north-trending, glaciated valley. Between Sandpoint and Bonners Ferry, Idaho, exposures of variably dipping Sandpoint Conglomerate are juxtaposed with mid-crustal metamorphic rocks that extend across the valley. The presence and location of faulting in the Purcell Trench have been controversial, and the age and tectonic significance of the Sandpoint Conglomerate have been enigmatic. New geologic mapping, metamorphic thermobarometry, and 40Ar/39Ar thermochronology verify the existence and location of the Eocene (45–55 Ma) east-dipping Purcell Trench normal fault zone, which consists of en echelon, right-stepping northern and southern fault segments. An unfaulted east-dipping homocline occupies the gap between them. It formed in the footwall of the west-dipping East Newport normal fault, which roots on the opposite side of the metamorphic culmination. "Chrontours" of K-Ar and 40Ar/39Ar cooling dates record progressive and nearly synchronous Eocene quenching of the metamorphic infrastructure as it was being exhumed by both the East Newport and the Purcell Trench normal faults. The Sandpoint Conglomerate is an Eocene basin-fill deposit that accumulated above the East Newport fault. Displacement on the east-dipping southern Purcell Trench fault eventually propagated across the footwall of the East Newport fault, transferring the Sandpoint Conglomerate to the hanging wall of the southern Purcell Trench fault and stranding it in the Purcell Trench. These relationships, which provide new insights on the process of extensional exhumation, should be helpful in tectonic interpretations of the Cordillera and other orogenic belts. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.
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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 | 0,003 |
| 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) | 0,007 | 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 ».