Окенический рифтогенез - Дубинин Е.П.
ISBN 5-89118-198-3
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4.5.1 .The model description.................................................................... 161
4.5.2. Evolution of the axial magma chamber during its formation and cooling ................... 163
4.5.3. Connection of a thermal state of the axial magma chamber with an axial high relief....... 168
4.5.4. Processes in axial magma reservoirs ..................................................... 170
CHAPTER 5. A HYDROTHERMAL CONVECTION IN MOR RIFT ZONES................................................. 174
5.1. GENERAL CHARACTERISTIC OF HYDROTHERMAL ACTIVITY IN MOR RIFT
ZONES.........................................,................................................ 174
5.2. DURATION OF EXISTENCE AND SPATIAL DISTRIBUTION OF HYDROTHERMAL
SYSTEMS ....................................................................................... 177
5.2.1. Hydrothermal mineralization.............................................................. 178
5.3. MODELS OF A HYDROTHERMAL CONVECTION ........................................................... 181
5.3.1. Convection in a porous medium............................................................ 183
5.3.2. Single-pass convection................................................................... 184
5.3.3. Convection induced by a difference of a relief........................................... 185
CHAPTER 6. METALLOGENY OF RIFT ZONES .................................................................. 187
6.1. HYDROTHERMAL SULFIDE DEPOSITS OF SLOW RATE SPREADING RIDGES ................................... 187
6.1.1. Snake Pit hydrothermal field (MARK area, MAR 23° N) ..................................... 187
6.1.2. TAG hydrothermal field, MAR26°N.......................................................... 193
6.2. HYDROTHERMAL SULFIDE DEPOSITS OF AVERAGE RATE SPREADING RIDGES ................................ 198
6.2.1. East Pacific Rise, 21° N .............................................198
6.2.2. Southern segment of Explorer ridge....................................................... 201
6.2.3. Juan de Fuca ridge....................................................................... 201
6.3. HYDROTHERMAL SULFIDE DEPOSITS OF THE SEGMENTS OF EPR WITH FAST
SPREADING RATE..............................................................206
6.4. HYDROTHERMAL SULFIDE DEPOSITS OF THE SEGMENTS OF EPR WITH VERY FAST
SPREADING RATE..............................................................209
6.5. TECTONO-MAGMATIC CYCLE AND FORMATION OF DEEP-WATER POLYMETALIC
SULFIDES .................................................................. 211
291
6.6. ESTIMATION OF FORMATION TIME OF POLYMETALLIC SULFIDE DEPOSITS............. 215
CHAPTER 7. PALEOSPREADING RIDGES IN A STRUCTURE OF AN OCEAN
LITHOSPHERE................................................................218
7.1. GEOLOGICAL AND GEOPHYSICAL CHARACTERISTIC OF PALEOSPREADING
RIDGES ................................................................... 220
7.1.1. Labrador paleospreading ridge....................................... 222
7.1.2. Aegir paleospreading ridge in the Norwegian basin .................. 223
7.1.3. Mathematician paleospreading ridge.................................. 224
7.1.4. Gravity anomalies over paleospreading ridges........................ 226
7.2. EVOLUTION OF THERMAL STRUCTURE OF LITHOSPHERE AT A DYING OF
SPREADING RIDGES ......................................................... 226
7.2.1. Evolution of a lithosphere of Labrador ridge ....................... 226
7.2.2. Evolution of a lithosphere of a Mathematician ridge ................ 231
7.3. PALEORIFT PLATE BOUNDARIES - SUTURE ZONES OF AN OCEAN LITHOSPHERE ........ 233
7.3.1. Passive riftogenious continental margins ........................... 233
7.3.2. Paleorift boundaries formed at jumping of a spreading axis ......... 336
7.3.3. Paleorift boundaries formed at a propagating of a spreading ridge .. 239
7.3.4. Paleorift boundaries formed at an evolution of triple junctions..... 239
CHAPTER 8. ENERGY OF THE EARTH (SOROKHTIN-USHAKOV MODEL)..........................242
8.1. FORMATION AND EARLY (PRE-RIFT) STAGE OF THE EARTH DEVELOPMENT............. 242
8.2. ENERGY OF THE EARTH DEVELOPMENT........................................... 249
8.2.1. Energy of an accretion and gravity differentiation of the Earth .... 250
8.2.2. Radiogenic energy................................................... 252
8.2.3. Energy balance of the Earth ........................................ 254
CHAPTER 9. OCEAN RIFTOGENESIS IN A HISTORY OF THE EARTH ...........................258
9.1. TECTONIC CONSEQUENCES OF TIDAL INTERPLAY OF A MOON WITH THE EARTH ... 258
