Carbonates in Jurassic deposits in the southeast of the Nyurol'ka depression (Tomsk Region)

被引：0
|
作者：
Nedolivko, NM
Zhukovskaya, EA
Bazhenov, VA
机构：
[1] Tomsk Polytech Univ, Tomsk 634034, Russia
[2] Russian Acad Sci, Inst Petr & Gas Geol, Tomsk 634021, Russia
[3] Tomsk Nat Resources Comm, Tomsk 634021, Russia
来源：
GEOLOGIYA I GEOFIZIKA | 2001年 / 42卷 / 03期
关键词：
sedimentary rocks; calcite; siderite; dolomite; sedimentogenesis; diagenesis; catagenesis; epigenesis; Jurassic;
D O I：
暂无
中图分类号：
P [天文学、地球科学];
学科分类号：
07 ;
摘要：
We studied the morphology, composition, occurrence, and sizes of deposits of secondary carbonates in Jurassic sedimentary rocks in the southeast of the Nyurol'ka depression (Tomsk Region). We have established a significant difference in the mineralogical and structural compositions of the carbonates as a result of their different genesis and the effect of oil and gas fluids during the formation and destruction of hydrocarbon pools. Diagenetic carbonates have a nearly stoichiometric composition and a nearly ideal structure and are least recrystallized. Carbonates that underwent catagenesis have larger crystals and a more isomorphous and defect structure. In the marginal zones of oil deposits the minerals are most crystallized. Siderite has the most defect structure, and dolomite is similar in structure to calcite, from which it might have formed.
引用
收藏
页码：491 / 501
页数：11
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