Kimberlites of Camsell Lake field and some features of construction, and composition of lithosphere roots of southeastern part of Slave Craton, Canada
Notice bibliographique
Résumé
Since the discovery of the first kimberlite pipe CL-25 within a new kimberlite field situated east of Camsell Lake in 1994 Petrographic and petrochemical characteristics of the CL-25 and CL-174 kimberlites are very close; the distribution patterns of compositions of garnets, magnesian ilmenites, and Cr-spinellide from both pipes are also quite identical. All the characteristics of kimberlites and their mantle-derived minerals reported for the CL-25 Pipe It is made up of typical kimberlite breccia with a high content of xenogenous material represented chiefly by the host granitoids and metamorphic rocks. Petrochemical and petrographical characteristics of the kimberlites from the CL-174 Pipe also permit them to be classified as group I (Skinner, Like the CL-25 Pipe, this pipe is poor in diamonds. The kimberlite rocks found in a system of dikes and in boulder trains near Snap Lake drastically differ from the kimberlites from the CL-25 and CL-174 pipes in petrography, petrochemistry, mineralogy, and in being incomparably richer in diamonds. The kimberlites from the Snap Lake region are established in a series of dikes up to 4 m thick, drilled on the western shore of the lake, in its southern part. Also, they are found in a blind body, resembling a thick (about 100 m) sill, drilled at a depth of 100 m; this body is made up of compositionally complex breccia with an upward variable amount of kimberlite material, reaching the maximum in the lower part of the body. A great deal of kimberlite fragments (hundreds of kilograms) have been established in a boulder train, extended from Snap Lake through a peninsula in the southern part of the lake. The dikes of the western shore are made up of kimberlite rocks with the massive texture of the groundmass and virtually contain no host rock xenoliths; the mantle rock xenoliths are very rare and are represented chiefly by serpentinized granular peridotites. Grains of pyropes, mainly of purple color and up to 3 mm in size, are very scarce. Grains of octahedral chromites up to 1.5 mm in size are also rare. Ilmenites in the rock are not found at all. It was established that the crushed and panned specimen, composed of several ten small fragments of 1.1 kg in total weight, contained 11 grains of pyrope, 16 grains of chromite, and 4 grains of diamond, the largest of which was about 2 mm in size. In composition these rocks belong to the most magnesian varieties of kimberlites and have analogs among the Siberian diamond-rich kimberlites: 31.6 -32.4 wt.% Si02, 0.73 -0.83 wt.% Ti02, 3.18 -3.93 wt.% A1203, 8.61 -9.38 wt.% Fe203, 0.18 -0.23 wt.% MnO, 32.5 -33.7 wt.% MgO, 1.64 -5.39 wt.% CaO, 0.01 -0.15 wt.% Na20, 0.36 -0.58 wt.% K20, 0.50 -0.82 wt.% P205; LOI= 13.2-15.9 wt.%. The pyropes from kimberlites have an unusually wide range of variations in Cr203 contents, up to 17 wt.%, and this distinguishes them from the pyropes from the South-African and Siberian pipes,
Récupéré en direct depuis OpenAlex et désinversé. Les résumés ne sont pas conservés dans cette base de données : les index inversés représentent 8,6 Go des 9,3 Go de texte de la base, et le serveur dispose de 13 Go libres.
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) | 0,002 | 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 ».